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• Hacking the Case Interview

McKinsey case interviews are the most difficult part of the McKinsey interview process. If you have an upcoming McKinsey case interview and are feeling stressed, overwhelmed, or unsure what to do, we have you covered.

While McKinsey case interviews can seem complicated and challenging, they can be relatively straight forward with enough practice.

In this article, we’ll walk you through a McKinsey case interview step-by-step to give you an overview of what to expect and what you should be doing every step of the way.

We’ll cover in detail:

• McKinsey interview process
• What is a McKinsey case interview?
• Why does McKinsey use case interviews?
• What do McKinsey case interviews assess?
• What is the format of a McKinsey case interview?
• How do I solve a McKinsey case interview?
• What are examples of McKinsey case interviews?
• McKinsey phone case interview differences
• How to prepare for McKinsey case interviews?
• What are recommended resources for McKinsey case interviews?

If you’re looking for a step-by-step shortcut to learn case interviews quickly, enroll in our case interview course . These insider strategies from a former Bain interviewer helped 30,000+ land consulting offers while saving hundreds of hours of prep time.

McKinsey Interview Process

The timeline and dates in the McKinsey interview process may slightly differ depending on whether you are applying as an undergraduate student, MBA student, advanced degree student, or working professional.

However, the overall components in the process are roughly the same. The McKinsey interview process has five major steps:

1. Attend McKinsey networking events

McKinsey typically hosts several networking events before the McKinsey application is due.

Attending these events is not required. If you have a strong resume and background, you can still receive a McKinsey interview even if you did not attend any events.

If you attend a top-tier undergraduate or MBA school, these networking events are less important. McKinsey has relationships with these schools and consistently hires students from these schools every year for internship and full-time opportunities. Your resume will get reviewed regardless of whether you attend a networking event or not.

If you do not attend a top-tier undergraduate or MBA school, these networking events will be much more important. Since your school is not a school that McKinsey targets, McKinsey recruiters spend much less time looking at applications from your school. Networking is crucial to giving your resume an opportunity to be reviewed.

Similarly, if you are applying to McKinsey as a working professional, networking events are much more important. Although McKinsey hires people from nontraditional backgrounds, you will need to do the work needed to get your name and resume in front of recruiters through networking or referrals.

2. Submit your McKinsey application

After all of the networking events are over, McKinsey will have a deadline for submitting your application, which typically consists of four components: McKinsey application questions, resume, cover letter, and referrals.

3. Pass your first round McKinsey interview

A few weeks after the application deadline, you will receive an invitation from McKinsey for the first of two rounds of interviews.

If you are applying as a student, interviews will take place on your school’s campus. If you are applying as a working professional, interviews will take place at the McKinsey office that you are applying for.

Your McKinsey first round interview consists of two separate 40- to 60-minute interviews. The majority of the time will be focused on case interviews, but you will also get a few other types of questions.

4. Pass your second or final round McKinsey interview

Your  McKinsey final round interview will typically consist of two to three separate 40- to 60-minute interviews. You’ll see the same four types of McKinsey interview questions that you saw in your first round interviews.

• McKinsey case interview
• McKinsey Personal Experience Interview (PEI)
• “Why McKinsey?” question
• “Why Consulting?” question

There are three important distinctions between your first round McKinsey interview and your final round McKinsey interview.

One, your interviewers will likely be more senior people at McKinsey. This means that the case interviews you receive may be a bit less structured and more qualitative in nature. The case interview may feel more like a discussion where you and the interviewer are discussing your opinions and ideas on a business problem.

Two, there will be more of an emphasis on assessing your fit with the firm. The first round interview is primarily used as a screener to determine whether or not you can solve case interviews effectively and whether or not you have the potential to be a great consultant.

Final round interviews will also continue to assess this, but interviewers will also be determining whether or not you would be a great fit with the office. Are you coachable and easy to work with? Are you collaborative? These are a few of the qualities that interviewers want to see.

Three, your interviewers may read the notes that your interviewers wrote during your McKinsey first round interview. If there was a particular area of the case interview that you struggled with, interviewers may want to test you again on it to make sure that it is not a significant weakness.

5. Receive your McKinsey Offer

After finishing your final round interview, all you have left to do is to wait for your McKinsey offer. McKinsey typically calls candidates to tell them that they are being extended a job offer before emailing them.

Some candidates receive a phone call with good news on the same day of their final round interview. Most candidates receive their call within a few days.

If you have not heard back from McKinsey after a few days, that does not necessarily mean that you did not receive a McKinsey offer. Sometimes, you may be on the borderline of receiving an offer and McKinsey would like to finish interviewing other people before deciding whether or not to give you an offer.

Be patient on waiting for McKinsey to get back to you. If you have not heard back in a week, you can send a follow-up email with the recruiter to ask if there are any updates.

When you finally get your call and offer letter, all that is left to do is sign to secure your job at McKinsey!

What is a McKinsey Case Interview?

A McKinsey case interview , also known as a “case” for short, is a 30 to 45-minute exercise in which you and the interviewer work together to develop a recommendation or answer to a business problem.

These business problems can be anything that real companies face:

• How can Uber increase its profitability?
• What can Netflix do to increase customer retention?
• How should Tesla price its new electric vehicle?
• Where should Disney open another Disneyland theme park?

McKinsey case interviews simulate what the consulting job will be like by placing you in a hypothetical business situation. Cases simulate real business problems that consulting firms solve for their clients. Many McKinsey case interviews are based on actual projects that interviewers have worked on.

While McKinsey consulting projects typically last between 3 to 9 months, McKinsey case interviews condense solving the business problem into just 30 to 45 minutes.

McKinsey case interviews can cover any industry, including retail, consumer packaged goods, financial services, energy, education, healthcare, government, and technology.

They can also cover a wide range of business situations, including entering a new market, launching a new product, acquiring a company, improving profitability, and growing revenues.

Although McKinsey case interviews cover a wide range of industries and business situations, no technical or specialized knowledge is needed.

Why Does McKinsey Use Case Interviews?

McKinsey uses case interviews because they are the best way for McKinsey to predict which candidates will make the best consultants. McKinsey case interviews do not predict this perfectly, but they come quite close. Assessing candidates based only on their McKinsey resume is not sufficient. 

Since McKinsey case interviews simulate the consulting job by placing you in a hypothetical business situation, McKinsey interviewers use case interviews to see how you would perform as a hypothetical consultant.

Many of the skills and qualities needed to successfully complete a case interview are the same skills and qualities needed to successfully finish a McKinsey consulting case project.

Case interviews also give you a sense of whether you would like the consulting job at McKinsey.

If you find case interviews interesting and exciting, you’ll likely enjoy consulting and working at McKinsey. If you find case interviews dull and boring, consulting may not be the best profession for you.

What Do McKinsey Case Interviews Assess?

McKinsey case interviews assess five different qualities or characteristics.

All of these five qualities can be assessed in just a 30 to 45-minute McKinsey case interview. This is what makes case interviews so effective in assessing consulting candidates.

1. Logical, structured thinking

Consultants need to be organized and methodical in order to work efficiently.

• Can you structure complex problems in a clear, simple way?
• Can you take tremendous amounts of information and data and identify the most important points?
• Can you use logic and reason to make appropriate conclusions?

2. Analytical problem solving

Consultants work with a tremendous amount of data and information in order to develop recommendations to complex problems.

• Can you read and interpret data well?
• Can you perform math computations smoothly and accurately?
• Can you conduct the right analyses to draw the right conclusions?

3. Business acumen

A strong business instinct helps consultants make the right decisions and develop the right recommendations.

• Do you have a basic understanding of fundamental business concepts?
• Do your conclusions and recommendations make sense from a business perspective?

4. Communication skills

Consultants need strong communication skills to collaborate with teammates and clients effectively.

• Can you communicate in a clear, concise way?
• Are you articulate in what you are saying?

5. Personality and cultural fit

Consultants spend a lot of time working closely in small teams. Having a personality and attitude that fits with the team makes the whole team work better together.

• Are you coachable and easy to work with?
• Are you pleasant to be around?

What is the Format of a McKinsey Case Interview?

Although there is a wide range of different cases you could be asked to solve, all McKinsey case interviews follow the same progression.

• Understanding the case background : the interviewer will provide you information on who the company or client is, what their business problem is, and any other relevant context needed for the case
• Asking clarifying questions : you’ll have the opportunity to ask questions to confirm your understanding of the case
• Structuring a framework : you’ll create and present a framework to the interviewer that organizes your thoughts and identifies the different areas or key questions you’d like to further investigate
• Starting the case : the interviewer will ask either a quantitative or qualitative question for you to answer
• Solving quantitative problems : the interviewer may ask you to perform math calculations, such as calculating profit, breakeven , or analyzing charts and graphs 
• Answering qualitative questions : the interviewer may ask business judgment questions to assess your business acumen and intuition
• Delivering a recommendation : the interviewer will ask you for your final overall recommendation for the case.

It is worth noting that while most consulting firms opt for a candidate-led interview approach, where the interviewee takes the lead in navigating a case, McKinsey stands out with its interviewer-led format .

In McKinsey's interviewer-led approach, the interviewer plays a more active role in guiding the conversation. 

Rather than the candidate taking charge of the case, the interviewer presents the business problem and directs the discussion. 

This approach aligns with McKinsey's emphasis on teamwork, collaboration, and adaptability, skills crucial in the world of consulting. By simulating the client-consultant interaction, this approach helps assess how candidates handle challenges in real-time discussions.

How Do I Solve a McKinsey Case Interview?

Below, we’ll walk through the seven steps of a McKinsey case interview that was presented in the previous section to show you how you should solve a McKinsey case interview.

1. Understanding the case background

The case interview will begin with the interviewer giving you the case background information. Let’s say that the interviewer reads you the following: 

Interviewer : Our client, Coca-Cola, is a large manufacturer and retailer of non-alcoholic beverages, such as sodas, juices, sports drinks, and teas. They have annual revenues of roughly $30 billion and an operating margin of roughly 30%. Coca-Cola is looking to grow and is considering entering the beer market in the United States. Should they enter?

As the interviewer reads this, take notes. It is important to understand what the objective of the case is and keep track of information.

One strategy for taking notes effectively is to turn your paper landscape and draw a vertical line to divide your paper into two sections. The first section should be roughly two-thirds of the page while the second section will be one-third of the page.

Take notes in the second section of your page.

After the interviewer finishes giving the case background information, confirm that you understand the situation and objective. Provide a concise synthesis like the following:

You : To make sure I understand correctly, our client, Coca-Cola, is a large manufacturer and retailer of non-alcoholic beverages. They are looking to grow and our objective is to determine whether or not they should enter the U.S. beer market.

Interviewer : That sounds right.

Make sure your synthesis is concise. You do not want to regurgitate verbatim everything that the interviewer has said. Only mention the most important pieces of information.

You should also make sure you verify the objective of the case. Answering or solving the wrong case objective is the quickest way to fail a case interview.

2. Asking clarifying questions

Next in the case interview, you’ll have the opportunity to ask questions before you begin thinking about how to solve the case.

At this point, only ask questions that are critical for you to fully understand the case background and objective. You’ll be able to ask more questions later.

You might ask a few questions like the following:

You : Is Coca-Cola looking to specifically grow revenues or profits?

Interviewer : Coca-Cola wants to grow profits.

You : Is there a particular financial goal or metric Coca-Cola is trying to reach within a certain time frame?

Interviewer : They are looking to grow annual profits by $2 billion within 5 years.

You : Great. Those are all the immediate questions I have for now.

3. Structuring a framework

After you understand the case background and objective of the case interview, lay out a framework of what areas you want to look into in order to answer or solve the case.

A case interview framework is simply a tool that helps you structure and break down complex problems into simpler, smaller components. Think of a framework as brainstorming different ideas and organizing them into different categories.

When creating a framework, it is completely acceptable to ask the interviewer for a few minutes of silence to write out a framework.

You : Would you mind if I take a few minutes to structure my thoughts and develop a framework to tackle this case?

Interviewer : Of course, go ahead.

For this case example, what do you need to know in order to help Coca-Cola decide whether or not they should enter the beer market?

You might brainstorm the following questions:

• Does Coca-Cola know how to produce beer?
• Would people buy beer made by Coca-Cola?
• Where would Coca Cola sell its beer?
• How much would it cost to enter the beer market?
• Will Coca-Cola be profitable from doing this?
• How can Coca-Cola outcompete competitors?
• What is the market size of the beer market?

This is not a very structured way of tackling the case, so organize these ideas into a framework that has 3 – 4 broad areas, also called “buckets”, that you want to investigate.

An easy way to develop these buckets is to ask yourself, what 3 – 4 things must be true for you to 100% recommend that Coca-Cola should enter the beer market.

In an ideal world. These four things would need to be true:

• The beer market is an attractive market with high profit margins
• Competitors are weak and Coca-Cola will be able to capture significant market share
• Coca-Cola has the capabilities to produce an outstanding beer product
• Coca-Cola will be extremely profitable

You can rephrase these points to be the broad categories in your framework.

Next, let’s add a few bullets under each category to give more detail on exactly what information we need to know to decide whether Coca-Cola should enter the beer market.

This entire process of brainstorming ideas and developing a structured framework should only take a few minutes.

For a complete guide on how to create tailored and unique frameworks for each case, check out our article on case interview frameworks .

Now that you have your framework, turn your paper to face the interviewer and walk them through it.

You : To decide whether or not Coca-Cola should enter the market, I want to look into four main areas.

One, I want to look into the beer market attractiveness. Is this an attractive market to enter? I’d want to look into areas such as the market size, growth rate, and profit margins.

Two, I want to look into the beer competitive landscape. Is this market competitive, and will Coca-Cola be able to capture meaningful market share? I want to look into questions such as the number of competitors, how much market share each competitor has, and whether competitors have any competitive advantages.

Three, I want to look into Coca-Cola’s capabilities. Do they have the capabilities to succeed in the beer market? I want to look into things such as whether they have the expertise to produce beer, whether they have the distribution channels to sell beer, and whether there are any existing synergies they can leverage.

Four, I want to look into expected profitability. Will Coca-Cola be profitable from entering the beer market? I want to look into areas such as expected revenues, expected costs, and how long it would take to break even.

The interviewer might ask a few questions on your framework, but will otherwise indicate whether they agree or disagree with your approach.

4. Starting the case

McKinsey case interviews are interviewer-led. So, the interviewer will propose which area of your framework they would like to dive deeper into. They might say something like the following:

Interviewer : Your framework makes sense to me. Why don’t we start by estimating the size of the U.S. beer market.

5. Solving quantitative problems

Expect to perform calculations and analyze charts and graphs during your case interview.

Market sizing questions are one type of quantitative question you may get asked. Let’s say the interviewer asks you:

Interviewer : What is the market size of beer in the U.S.?

Most candidates jump right into the math, stating the U.S. population and then performing various calculations. Doing math without laying out a structure often leads to making unnecessary calculations or reaching a dead-end.

Laying out an upfront approach helps avoid these mistakes and demonstrates that you are a logical, structured thinker.

For this market sizing problem, you could structure your approach in the following way:

• Start with the U.S. population
• Estimate the percentage that are legally allowed to drink alcohol
• Estimate the percentage that drink beer
• Estimate the frequency in which people drink beer
• Estimate the average price per can or bottle of beer

Multiplying these steps together gives you the answer. By laying out an approach up front, the interviewer can easily understand how you are thinking about the problem. With the right structure, the rest of the problem is simple arithmetic.

Sometimes the interviewer will give you numbers to use for these calculations. Other times, you’ll be expected to make assumptions or estimates.

When performing your calculations, make sure to do them on a separate sheet of paper. Calculations often get messy and you want to keep your original paper clean and organized.

A sample answer to this question could look like this:

You : To estimate the market size of beer in the U.S., I’m going to start with the U.S. population. Then, I’ll estimate the percentage that are eligible to drink alcohol. I’ll then estimate the percentage of the remaining population that drinks beer.

If we take this and multiply it by the frequency in which people drink beer and the average price per can or bottle of beer, we will find an estimate for the market size. 

Does this approach make sense to you?

Interviewer : Makes sense to me.

You : Great. I’ll assume the U.S. population is 320M people. Assuming the average life expectancy is 80 years old and an even distribution of ages, roughly 75% of the population can legally drink alcohol.

This gives us 240M people. Of these, let’s assume 75% of people drink beer. That gives us 180M beer drinkers.

Let’s say on average, a person drinks five beers a week, or roughly 250 beers per year, assuming roughly 50 weeks per year.

This gives us 180M * 250 = 45B cans or bottles of beer.

Assuming the average can or bottle of beer costs $2, this gives a market size of $90B.

You should not only answer the question, but tie the answer to the case objective.

In other words, how does knowing the U.S. market size of beer help you decide whether or not Coca-Cola should enter the market?

You could say something like the following:

You : Given that Coca-Cola has annual revenues of $30B, a $90B beer market represents a massive opportunity. The market size makes the beer market look attractive, but I’d like to understand if beer margins are typically high and determine how much market share Coca-Cola could realistically capture.

6. Answering qualitative questions

In addition to asking quantitative questions during the case interview, the interviewer will also ask qualitative questions.

One type of qualitative question you could get asked are brainstorming questions. For example, the interviewer might ask:

Interviewer : What are the barriers to entry in the beer market?

Most candidates answer by listing ideas that immediately come to mind:

• Brewing equipment
• Beer production expertise
• Distribution channels

This is a highly unstructured way of answering the question. Make sure to use a simple structure to organize your thoughts.

A simple structure, such as thinking about barriers to entry as either economic barriers or non-economic barriers, helps facilitate brainstorming and demonstrates logic and structure.

With this structure, you might come up with the following answer:

You : I’m thinking of barriers to entry as economic barriers and non-economic barriers. Economic barriers include things such as equipment, raw material, and other capital. Non-economic barriers include: beer brewing expertise, brand name, and distribution channels.

Looking at these barriers, I think it will take Coca-Cola a lot of work to overcome these barriers. While Coca-Cola does have a brand name and distribution channels, they lack beer brewing expertise and would have to buy a lot of expensive equipment and machinery. These barriers make entering the beer market difficult.

7. Delivering a recommendation

You’ve done a ton of work so far in the case interview and now it is time to put everything together into a recommendation.

Throughout the interview, you should have been making notes of key takeaways after each question you answer.

Take a look at the key takeaways you’ve accumulated so far and decide whether you want to recommend entering the beer market or not entering the beer market:

• The U.S. beer market size is $90B compared to Coca-Cola’s annual revenue of $30B
• The beer market profit margins are 10% compared to Coca-Cola’s average margin of 30%
• The beer market is highly concentrated across all categories
• Barriers to entry are moderate
• There are some synergies with existing production

There is no right or wrong recommendation, as long as you support your recommendation with reasons and evidence.

Regardless of what stance you take, make sure you have a firm recommendation. You do not want to be flimsy and switch back and forth between recommending entering the market and not entering the market.

Secondly, make sure your recommendation is clear and concise. Use the following structure:

• Clearly state what your recommendation is
• Follow that with the 2 - 3 reasons that support your recommendation
• State what potential next steps would be to further validate your recommendation

The conclusion of the case might look like the following:

Interviewer : Let’s say that you bump into the CEO of Coca-Cola in the elevator. He asks you what your preliminary recommendation is. What do you say?

You : I recommend that Coca-Cola should not enter the U.S. beer market for the following three reasons.

One, although the market size is fairly large at $90B, the margins for beer are just 10%, significantly less than Coca-Cola’s overall operating margin of 30%.

Two, the beer market is very competitive. In all beer segments, market share is concentrated among a few players, which implies high barriers to entry. Coca-Cola lacks beer brewing expertise to produce a great product that existing incumbents have.

Three, there are not that many production synergies that Coca-Cola can leverage with its existing products. Coca-Cola would need to buy new equipment, source new raw materials, and provide new training to employees, which will be time-consuming and costly.

For next steps, I want to look into Coca-Cola’s annual expected profits if they were to enter the U.S. beer market. I hypothesize that they will be unable to achieve an increase in annual profits of $2B within five years, but I’d like to confirm this through further analysis.

What are Examples of McKinsey Case Interviews?

The best place to find examples of McKinsey case interviews is on their official website. There, they have provided four case interview examples that you can practice along with:

• Diconsa case interview practice :   Non-profit case focused on deciding whether to leverage a chain of convenience stores to deliver basic financial services to inhabitants of rural Mexico. Great practice case for the non-profit sector.
• GlobaPharm case interview practice :  Acquisition case focused on deciding whether a large pharmaceutical company should acquire a smaller startup. This case has very difficult math calculations that you can practice.
• Electro-light case interview practice :  New product launch case focused on deciding whether a beverage company should launch a new sports drink. Outstanding case to practice interpreting various charts and graphs.
• National Education case interview practice : Non-profit case focused on helping an Eastern European country’s Department of Education improve their school system. Another great practice case for the non-profit sector.
• Beautify case interview practice : Evaluate whether a beauty products company should be training in-store beauty consultants in the use of virtual channels to connect with customers
• Talbot trucks case interview practice : Determine whether to invest in the production and sale of electric trucks
• Shops corporation case interview practice : Improve internal diversity, equity, and inclusion for a retail company
• Conservation forever case interview practice : Prioritize large-scale biodiversity protection projects for a conservation NGO

We have videos that walk through the first two McKinsey case examples.

For more McKinsey case interview examples and practice cases, check out our article on 23 MBA consulting casebooks with 700+ free practice cases .

Many of the casebooks that MBA consulting clubs put together compile previous cases given by consulting firms, including McKinsey.

McKinsey Phone Case Interview Differences

The McKinsey phone interview consists primarily of a slightly shorter, 30-minute case interview. 

The major differences between a McKinsey phone interview and in-person interview are that the phone interview is shorter, has an easier case interview with less depth, does not have complicated exhibits, and lacks qualitative discussion.

  1. Shorter interview length

The case interview in a McKinsey phone interview is roughly 30 minutes, shorter than the typical 40- to 60-minute McKinsey case interview.

2. Easier case interview with less depth

The case interview in a McKinsey phone interview will be a more straight-forward business problem, such as:

• Why is profitability declining?
• Should we enter this new market?
• Should we acquire this company?

It is unlikely that you’ll get an unusual or atypical business situation.

Additionally, because the McKinsey phone interview is only 30 minutes, the case will be covered in less depth. There will either be fewer questions asked during the case or the questions asked will be very surface-level, not requiring deeper dives.

3. Does not have complicated exhibits

Given that the McKinsey phone interview is only 30 minutes, there will likely not be time for the interviewer to hand you several different exhibits with complicated charts and graphs. You’ll likely be given a simpler quantitative problem to solve.

4. Lacks qualitative discussion

In a typical case interview, the interviewer will ask a few qualitative questions to start a discussion to assess your business acumen.

Given that the McKinsey phone interview is only 30 minutes, there will likely only be enough time for you to solve the main quantitative problem and perhaps briefly answer one qualitative question.

Therefore, you’ll be less tested on business knowledge and principles during the McKinsey phone interview.

How to Prepare for McKinsey Case Interviews

There are seven steps to preparing for McKinsey case interviews.

1. Understand what a case interview is

The first step in preparing for McKinsey case interviews is to understand exactly what case interviews are.

When you are familiar with what case interviews are, it is important to know what a great McKinsey case interview performance looks like.

Knowing what a great McKinsey case interview performance looks like will facilitate how quickly you learn case interview strategies in the next step.

Before continuing onto the next step, you should be familiar with:

• The overall objective of a case interview
• The structure and flow of a case interview
• The types of questions you could get asked
• What a great case interview performance looks like

2. Learn the right strategies

Now that you have sufficient background knowledge, the next step in preparing for McKinsey case interviews is to learn the right strategies to build good case interview habits.

It is much more effective to learn the right case strategies the first time than to learn poor strategies and try to correct them later.

The quickest, most efficient way to learn these strategies is to go through our Comprehensive Case Interview Course .

If you prefer reading case interview prep books instead, the three I recommend are:

• The Ultimate Case Interview Workbook
• Case Interview Secrets

Hacking the Case Interview provides strategies on exactly what to do and what to say in every step of the case interview. It is a concise and straight to the point guide. I recommend this book as the first book to read for beginners.

Case Interview Secrets teaches core concepts such as the issue tree , drill-down analysis, and a hypothesis driven approach. It illustrates these concepts through stories and anecdotes. If you have read Hacking the Case Interview, I recommend also reading this book to get perspectives from a second author. Check out our full review of Case Interview Secrets .

Case in Point provides a ton of specific and complex frameworks. However, you likely won’t be using many of these in an actual case interview because many of them are overly complex and specific. If you have time, it may be useful to skim through this book. Check out our full review of Case in Point .

At the bare minimum, read either the first or second book. If you have the time, read the first two books so that you can get strategies from two different authors.

Make sure to spend sufficient time learning the right strategies before starting to practice cases. It is ineffective to practice cases if you have no idea what strategies to practice and refine.

Before moving onto the next step, you should at least have strategies for the following parts of a case interview:

• Developing unique and tailored frameworks
• Solving quantitative problems
• Answering qualitative questions
• Delivering a recommendation

3. Practice 3-5 cases by yourself

Once you have learned the right strategies, the next step in McKinsey case interview prep is to practice.

When practicing case interviews, it is usually better to practice with a case interview partner than to practice by yourself . Casing with a partner better simulates the real case interview experience.

However, when you are just starting to practice, I recommend doing the first 3 – 5 cases by yourself.

There are three reasons for this:

• You can get the hang of the case interview structure and format much more quickly working by yourself rather than having to wait to schedule a time with a partner
• There are many aspects of case interviews that you can practice without a partner, such as structuring a framework and solving quantitative problems. You can get much more practice working through these parts by yourself
• You may have difficulty finding a case interview partner if you are a complete beginner. Without having done any cases, you likely won’t know how to properly give a case or provide good feedback

4. Practice 5-10 cases with a partner

The next step in preparing for McKinsey case interviews is to case with a partner.

Casing with a partner is the best way to simulate a real case interview. There are many aspects of case interviews that you won’t be able to improve on unless you practice live with a partner.

When practicing cases with a partner, ensure you are spending enough time after cases to deliver feedback.

For a case that takes around 30 – 40 minutes, spend at least 15 – 20 minutes for feedback. Much of your learning and improvement will come from these feedback sessions.

Do not move onto the next step until you have done at least 5 – 10 cases and are beginning to feel comfortable with case interviews.

5. Practice with a former or current consultant

At this point, I highly recommend asking former or current consultants to give you a practice case. This will significantly help you prepare for case interviews.

Doing a mock case with a former or current consultant is highly advantageous because they know exactly how to run cases and give feedback. You’ll receive incredibly helpful feedback that your previous case partners likely missed.

If you feel that you are plateauing with your case partner, that is a sign you should do a mock case interview with a former or current consultant.

You can find former or current consultants among:

• People you met during the consulting recruiting process
• Your broader LinkedIn network

I would not ask a consultant that is involved with the consulting recruiting process for a case too prematurely. Although these practice cases are not evaluative, some firms will actually make note of how well you perform during the practice case.

At this point, you will have accumulated a long list of improvement areas from all of the different people you have cased with.

6. Work on your improvement areas

In this step of preparing for McKinsey case interviews, you will work on strengthening and fine-tuning your improvement areas. Examples of common improvement areas include:

• Creating a more complete and mutually exclusive framework
• Performing math calculations quicker or more smoothly
• Providing more structure to your qualitative answers
• Leading the case more proactively
• Delivering a more succinct recommendation

Try to focus on improving one thing at a time. This is much more effective than trying to improve everything at once.

For some areas, such as math, it will be better to work independently. For other areas, such as learning to proactively lead the case, it will be better to work with a case partner.

If you are looking for more cases, look at the resources listed in step four. If you are looking for specific drills or practice problems for a particular part of a case interview, check out The Ultimate Case Interview Workbook .

Do not move onto the next step until you have finished working on all of your improvement areas.

7. Stay sharp

If you have progressed this far, congratulations! You have almost finished preparing for McKinsey case interviews.

Once you feel that you have no more improvement areas to work on, the key is to not burn yourself out by doing too many unnecessary cases.

While each case that you do makes you slightly better, there is a point when doing too many cases can create case fatigue right before your interview. Case fatigue can negatively impact your interview performance.

On the other hand, you also don’t want to go weeks without having done a case. You may end up forgetting strategies or become rusty and slow.

Once you have achieved case mastery, I recommend doing no more than 2 cases per week in the weeks leading up to your interview. This ensures that you remain sharp for case interviews, but don’t have case fatigue.

What are Recommended Resources for McKinsey Case Interviews?

To prepare for McKinsey case interviews, you can use a variety of different case interview prep books, online courses, and coaching. We'll cover each of these different categories of resources in more detail.

McKinsey Case Interview Prep Books

Case interview prep books are great resources to use because they are fairly inexpensive, only costing $20 to $30. They contain a tremendous amount of information that you can read, digest, and re-read at your own pace.

Based on our comprehensive review of the 12 popular case interview prep books , we ranked nearly all of the case prep books in the market.

The three case interview prep books we recommend using are:

• Hacking the Case Interview : In this book, learn exactly what to do and what to say in every step of the case interview. This is the perfect book for beginners that are looking to learn the basics of case interviews quickly.
• The Ultimate Case Interview Workbook : In this book, hone your case interview skills through 65+ problems tailored towards each type of question asked in case interviews and 15 full-length practice cases. This book is great for intermediates looking to get quality practice.
• Case Interview Secrets : This book provides great explanations of essential case interview concepts and fundamentals. The stories and anecdotes that the author provides are entertaining and help paint a clear picture of what to expect in a case interview, what interviewers are looking for, and how to solve a case interview.

McKinsey Case Interview Courses

Case interview courses are more expensive to use than case interview prep books, but offer more efficient and effective learning. You’ll learn much more quickly from watching someone teach you the material, provide examples, and then walk through practice problems than from reading a book by yourself.

Courses typically cost anywhere between $200 to $400.

If you are looking for a single resource to learn the best McKinsey case interview strategies in the most efficient way possible, enroll in our comprehensive case interview course .

Through 70+ concise video lessons and 20 full-length practice cases based on real interviews from top-tier consulting firms, you’ll learn step-by-step how to crush your McKinsey case interview.

We’ve had students pass their McKinsey first round interview with just a week of preparation, but know that your success depends on the amount of effort you put in and your starting capabilities.

McKinsey Case Interview Coaching

With case interview coaching, you’ll pay anywhere between $100 to $300 for a 40- to 60-minute mock case interview session with a case coach. Typically, case coaches are former consultants or interviewers that have worked at top-tier consulting firms.

Although very expensive, case interview coaching can provide you with high quality feedback that can significantly improve your case interview performance. By working with a case coach, you will be practicing high quality cases with an expert. You’ll get detailed feedback that ordinary case interview partners are not able to provide.

Know that you do not need to purchase case interview coaching to receive a consulting job offer. The vast majority of candidates that receive offers from top firms did not purchase case interview coaching. By purchasing case interview coaching, you are essentially purchasing convenience and learning efficiency.

Case interview coaching is best for those that have already learned as much as they can about case interviews on their own and feel that they have reached a plateau in their learning. For case interview beginners and intermediates, it may be a better use of their money to first purchase a case interview course or case interview prep book before purchasing expensive coaching sessions.

If you do decide to eventually use a case interview coach, consider using our case coaching service .

There is a wide range of quality among coaches, so ensure that you are working with someone that is invested in your development and success. If possible, ask for reviews from previous candidates that your coach has worked with.

Summary of the Best McKinsey Case Interview Resources

To prepare for McKinsey case interviews as well as case interviews from other consulting firms, we recommend the following resources:

• Comprehensive Case Interview Course (our #1 recommendation): The only resource you need. Whether you have no business background, rusty math skills, or are short on time, this step-by-step course will transform you into a top 1% caser that lands multiple consulting offers.
• Hacking the Case Interview Book   (available on Amazon): Perfect for beginners that are short on time. Transform yourself from a stressed-out case interview newbie to a confident intermediate in under a week. Some readers finish this book in a day and can already tackle tough cases.
• The Ultimate Case Interview Workbook (available on Amazon): Perfect for intermediates struggling with frameworks, case math, or generating business insights. No need to find a case partner – these drills, practice problems, and full-length cases can all be done by yourself.
• Case Interview Coaching : Personalized, one-on-one coaching with former consulting interviewers
• Behavioral & Fit Interview Course : Be prepared for 98% of behavioral and fit questions in just a few hours. We'll teach you exactly how to draft answers that will impress your interviewer
• Resume Review & Editing : Transform your resume into one that will get you multiple interviews

Land Multiple Consulting Offers

Complete, step-by-step case interview course. 30,000+ happy customers.

A Comprehensive Guide to McKinsey Case Interview Preparation

Looking to ace your McKinsey case interview? Our comprehensive guide has got you covered! From understanding the interview process to mastering case frameworks, we provide expert tips and strategies to help you prepare and succeed.

Posted June 8, 2023

Featuring Ben L. and Jeremy S.

Nailing the Case with McKinsey & Bain Alumni

Monday, april 1.

11:00 PM UTC · 60 minutes

Preparing for a McKinsey case interview can be a daunting task, especially if you’re not sure where to start. As one of the most prestigious consulting firms in the world, McKinsey & Company is known for its rigorous interview process, which involves a unique problem-solving approach and an emphasis on communication skills. In this comprehensive guide, we’ll take you through all the steps you need to take to prepare for the McKinsey case interview and give you the best chance of success.

Understanding the McKinsey Case Interview Process

The McKinsey case interview is a simulation of a real-world business problem. The interviewer will present you with a hypothetical scenario based on a real-life company, and ask you to analyze the situation, identify the key issues, and provide a recommendation for how the company should proceed. The objective of the case interview is to test your analytical and problem-solving skills, as well as your ability to communicate your ideas in a clear and concise manner.

It is important to note that the McKinsey case interview is not just about getting the right answer. The interviewer is also evaluating your thought process, creativity, and ability to think on your feet. Therefore, it is important to approach the case interview with an open mind and be willing to explore different solutions and perspectives.

One way to prepare for the McKinsey case interview is to practice with case studies. There are many resources available online, including sample cases and practice questions. It is also helpful to work with a partner or mentor who can provide feedback on your approach and communication skills.

Key Skills Required for a Successful McKinsey Case Interview

To succeed in a McKinsey case interview, you need to possess several key skills. First and foremost, you need to be able to think critically and strategically. You must also be able to communicate your ideas in a clear and concise manner, and be comfortable with numbers and data analysis. Additionally, you need to demonstrate the ability to manage your time effectively, remain calm under pressure, and work collaboratively with others.

Another important skill to have for a successful McKinsey case interview is the ability to ask insightful questions. You should be able to identify the key issues and ask relevant questions that will help you understand the problem at hand. This will also demonstrate your curiosity and eagerness to learn.

Lastly, it is important to have a strong business acumen. You should have a good understanding of the industry and market trends, as well as the company's goals and objectives. This will help you provide relevant and practical solutions to the case problem, and showcase your ability to think like a business leader.

For more tips on how to maximize your chances of landing a management consulting position that's right for you, check out these resources:

• Mastering Case Interview Math: Essential Formulas
• Writing a Winning Consulting Cover Letter: A Comprehensive Guide
• Understanding the Salary Structure in Management Consulting

Mastering Consulting Case Frameworks: A Comprehensive Guide

• Five Tips for Breaking Into Management Consulting

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Tips to Ace McKinsey Case Interview

Preparation is key when it comes to acing a McKinsey case interview. Here are some tips to help you succeed:

• Be well-prepared: Research the firm and the industry you are interested in and practice case studies.
• Be analytical: Use a structured framework to analyze the case and identify the key issues.
• Be confident: Always articulate your thoughts and recommendations with clarity and confidence.
• Be concise: Communication is key, so make sure you get to the point and avoid unnecessary information.
• Practice: Mock interviews are essential to improving your skills and getting used to the interview process.

It's also important to remember that the interviewer is not looking for a perfect solution, but rather how you approach the problem and your ability to think critically. Don't be afraid to ask clarifying questions and take time to gather your thoughts before answering. Additionally, be sure to listen actively to the interviewer and incorporate their feedback into your analysis. By following these tips and staying calm under pressure, you can increase your chances of acing the McKinsey case interview.

The Importance of Researching the Company and Industry before the Interview

Before the interview, it’s crucial to research the company and the industry you are interested in. Knowing the company's history, values, and key clients will help you demonstrate your interest and knowledge during the interview. Additionally, understanding the industry trends, challenges, and opportunities can help you come up with more insightful and strategic recommendations.

Another reason why researching the company and industry is important is that it can help you tailor your responses to the interviewer's questions. By understanding the company's goals and challenges, you can highlight your skills and experiences that align with their needs. Moreover, knowing the industry trends and best practices can help you provide relevant examples and insights that showcase your expertise.

Furthermore, researching the company and industry can also help you assess whether the company is a good fit for you. By learning about the company culture, work environment, and values, you can determine whether they align with your own goals and values. This can help you make an informed decision about whether to accept a job offer if one is extended to you.

How to Structure Your Responses in a McKinsey Case Interview

Structuring your responses is essential to communicating your ideas effectively and showing your analytical skills. Use a structured framework such as MECE (Mutually Exclusive and Collectively Exhaustive) to break down the problem and identify the key issues. Once you have identified the issues, prioritize them and develop recommendations based on your analysis. Make sure to articulate your thought process clearly and concisely throughout the exercise.

It is also important to actively listen to the interviewer and ask clarifying questions to ensure you fully understand the problem at hand. This will help you tailor your response to the specific needs of the client and demonstrate your ability to work collaboratively. Additionally, be prepared to adapt your approach if new information is presented during the interview. Flexibility and agility are highly valued qualities in a consultant and can set you apart from other candidates.

Common Mistakes to Avoid in a McKinsey Case Interview

Common mistakes that applicants make in McKinsey case interviews include:

• Jumping to conclusions without sufficient analysis.
• Overcomplicating the problem.
• Providing vague or incomplete recommendations.
• Getting frazzled under pressure.

Avoiding these pitfalls can help you stand out and demonstrate your problem-solving skills effectively.

Another common mistake that applicants make in McKinsey case interviews is not asking enough clarifying questions. It is important to fully understand the problem and the context before jumping into analysis and recommendations. Additionally, not asking questions can make it seem like you are not engaged or interested in the problem at hand. Therefore, make sure to ask thoughtful and relevant questions throughout the interview to demonstrate your curiosity and analytical skills.

Sample McKinsey Case Interview Questions and Answers

Sample McKinsey case interview questions can range from market sizing to competitive strategies. Here are some examples:

• How would you estimate the size of the global coffee market?
• How would you advise a chain of retail stores facing declining sales?
• How would you help a software company develop a new product?
• How would you advise a hospital facing budget constraints?

Answers to these questions require a structured approach, including the identification of key issues, relevant analysis, and well-supported recommendations.

It is important to note that McKinsey case interviews are not just about finding the right answer, but also about demonstrating strong problem-solving skills and the ability to communicate effectively. Candidates are expected to ask clarifying questions, think critically, and present their ideas in a clear and concise manner.

In addition to the case interview questions, candidates may also be asked behavioral questions to assess their fit with the company culture and values. These questions may focus on leadership, teamwork, and communication skills, among others.

The Role of Creativity in Solving McKinsey Case Study Problems

Creativity is just as important as analytical skills in the McKinsey case interview. You must demonstrate creativity in identifying potential solutions and making recommendations that are both innovative and realistic. Creative problem-solvers are valued in the consulting industry, as they can offer fresh ideas and perspectives that can benefit their clients.

How to Develop a Personalized Strategy for McKinsey Case Interviews

Developing a personalized strategy for McKinsey case interviews is crucial to success. Understand your strengths and weaknesses and focus on improving your weaknesses. You should also participate in mock interviews and receive feedback from others to help you improve your performance. Consider working with a coach or mentor who can provide you with additional guidance and advice.

The Benefits of Mock Interviews in Preparing for a McKinsey Case Interview

Mock interviews are an essential tool in preparing for a McKinsey case interview. Mock interviews help you get used to the format of the interview, identify your strengths and weaknesses, and receive feedback on your performance. Practicing with different problems and cases also helps you become more comfortable with the analytical process and develop creative problem-solving skills.

The Importance of Confidence and Communication Skills in a McKinsey Case Interview

Confidence and communication skills are equally essential in a McKinsey case interview as analytical skills. You must be able to articulate your ideas in a clear and concise manner and demonstrate your confidence in your recommendations. Additionally, being comfortable with numbers and data analysis is essential in communicating your insights effectively. Practice your communication skills and prepare accordingly to increase your confidence and show your potential.

How to Follow Up After a Successful McKinsey Case Interview

Following up after a successful McKinsey case interview is an essential step that many candidates overlook. Send a thank-you note or email expressing your appreciation for the opportunity, and reiterate your interest in the position. Keep the communication positive, professional, and timely. This follow-up can help set you apart from other candidates and demonstrate your attention to detail and enthusiasm for the company.

Resources for Further Practice and Preparation for a McKinsey Case Interview

There are plenty of resources available online and offline to help you prepare for a McKinsey case interview. Some of the popular ones include:

• Case in Point: Complete Case Interview Preparation by Marc P. Cosentino
• McKinsey & Company interview preparation resources
• Victor Cheng’s Case Interview Videos

Make use of these resources, attend networking events, and seek out advice from professionals in the consulting industry to help you prepare for the interview.

Preparing for a McKinsey case interview can be challenging, but with practice and preparation, you can increase your chances of success. Keep in mind the key skills required for success and practice your communication skills, and make use of the resources available to you. Follow the tips mentioned in this guide, and put in the effort required to succeed. With hard work and dedication, you can ace your McKinsey case interview and start your career in consulting.

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McKinsey recruiters reveal exactly how to nail the interview and case study to land a 6-figure job at the consulting firm

• The latest salaries report from Management Consulted, a consulting careers resource website, showed that McKinsey's hires with MBAs and PhDs make a base salary of $165,000.  
• The consulting firm is working to diversify their applicant pool and bring in more hires from non-Ivy League schools. 
• Business Insider spoke with two McKinsey recruitment directors on how to nail the interview and score a spot at the company. 
• Click here for more BI Prime stories.

Top management consulting firm McKinsey & Company offers some of the highest-paying salaries for recent grads. But it's hard to land a coveted six-figure role at the firm. 

According to the latest salaries report from Management Consulted , a careers resource website catered to job seekers in the consulting field, McKinsey's MBA and PhD hires make a base salary of $165,000 — and that's not including the $35,000 performance bonus for all employees, and the 50% MBA tuition reimbursement for returning interns. 

It's no surprise that management consultants are getting paid six figures from get-go. It's been that way for years. However, the report noted an emerging trend that serves as good news for those who might not have an Ivy League degree : Consulting firms are increasing recruitment from non-target schools — this means they're steering away from relying on Ivy League universities like Harvard for hires. In fact, these companies are holding up to 20% of their recruitment slots for those with non-target backgrounds, according to the report.

McKinsey, for example, hired about 8,000 people out of an applicant pool of 800,000 in 2018. Those employees were recruited from 325 different schools around the world, the company shared. 

Business Insider recently spoke with Kerry Casey , McKinsey's director of recruitment in the North American region and Caitlin Storhaug , McKinsey's global director of recruitment marketing and communications. 

The two experts shared insights on how to nail an interview with the company. 

When it comes to the case exercise: Don't wing it

Every McKinsey interview follows a standardized process that is broken down into two components. Prospective candidates are asked to complete a personal experience interview and a case study exercise.

" It doesn't matter if you're interviewing from San Francisco, New York City, or Shanghai — the interview process is standard," Storhaug said. "There aren't harder or easier countries for you to get in." 

Every business school graduate is probably familiar with case studies. Harvard Business School (HBS) developed the case method teaching practice , where students are required to read up to 500 cases during their two-year program. Other MBA schools also adopted this strategy to prepare students for tackling real-world businesses problems.

McKinsey's case interviews, in particular, take about 25 to 30 minutes, and it's an opportunity for candidates to showcase how they approach problem solving and think on their feet, Casey explained. When you're tackling a case exercise, focus on how you would go about solving the client problem and not what you think the recruiters want to see in your responses. 

The company provided a case exercise sample and encouraged applicants to practice so that they know the exact format and the type of answers the recruiters look for. 

When you're prepping for an interview with the firm, keep those samples in mind, Storhaug added. 

Emphasize on your soft skills

One of the most common mistakes that McKinsey's applicants make is that they focus too much on acing case exercises that they fail to really prepare for the personal interview, Casey explained in an email to Business Insider. 

"I encourage them to focus also on what are often referred to as soft skills — their aptitude for collaboration, team work, empathy, and leading others," she wrote. "In the long run, those are the qualities that make for success." 

Apart from those technical skills, a management consulting job requires collaborative and relationship-building skills. Ultimately, you can't get to the problem-solving component if you don't have a track record of working well with others. 

Additionally, Casey added that the personal experience interview doesn't have to be as formal as one might expect. In fact, she wrote that the best interviews are actually conversations rather than strictly planned questions.  

This second round is your opportunity to show your attributes beyond your résumé. What are some skills you're hoping to develop with this job? What are your own professional goals in five years? 

Casey recommends sharing your own career aspirations. That way, it shows that you know what you want.

Talk about your technical skills if you have them

Technical skills are in high demand, and it's beneficial to have employees who understand how tech can impact clients. 

"While not everyone is a tech-focused consultant, of course, we see tech and digital skills being more necessary as we grow and expand into new areas," Casey wrote. "We appreciate candidates who may have expanded their knowledge to include coding, programming and other tech aspects." 

Some other top tech skills that employers want are program languages like Python, C++, and JavaScript, Business Insider previously reported.

• Main content

Case interview maths (formulas, practice problems, and tips)

Today we’re going to give you everything you need in order to breeze through maths calculations during your case interviews. 

Becoming confident with maths skills is THE first step that we recommend to candidates like Karthik , who got an offer from McKinsey. 

And one of the first things you’ll need to know are the 6 core maths formulas that are used extensively in case interviews. 

Let’s dive in!

• Case interview maths formulas
• Must-know formulas
• Optional formulas
• Cheat sheet
• Practice questions
• Case maths apps and tools
• Tips and tricks
• Practice with experts

Click here to practise 1-on-1 with MBB ex-interviewers

1. case interview maths formulas, 1.1. must-know maths formulas.

Here’s a summarised list of the most important maths formulas that you should really master for your case interviews:

If you want to take a moment to learn more about these topics, you can read our in-depth article about  finance concepts for case interviews .

1.2. Optional maths formulas

In addition to the above, you may also want to learn the formulas below. 

Having an in-depth understanding of the business terms below and their corresponding formulas is NOT required to get offers at McKinsey, BCG, Bain and other firms. But having a rough idea of what they are can be handy.

EBITDA = Earnings Before Interest Tax Depreciation and Amortisation

EBIDTA is essentially profits with interest, taxes, depreciation and amortisation added back to it.

It's useful for comparing companies across industries as it takes out the accounting effects of debt and taxes which vary widely between, say, Meta (little to no debt) and ExxonMobil (tons of debt to finance infrastructure projects). More  here .

NPV = Net Present Value

NPV tells you the current value of one or more future cashflows. 

For example, if you have the option to receive one of the two following options, then you could use NPV to choose the more profitable option:

• Option 1 : receive $100 in 1 year and $100 in 2 years
• Option 2 : receive $175 in 1 year

If we assume that the interest rate is 5% then option 1 turns out to be slightly better. You can learn more about the formula and how it works  here .

Return on equity = Profits / Shareholder equity

Return on equity (ROE) is a measure of financial performance similar to ROI. ROI is usually used for standalone projects while ROE is used for companies. More  here .

Return on assets = Profits / Total assets

Return on assets (ROA) is an alternative measure to ROE and a good indicator of how profitable a company is compared to its total assets. More  here .

1.3 Case interview maths cheat sheet

If you’d like to get a free PDF cheat sheet that summarises the most important formulas and tips from this case interview maths guide, just click on the link below.

Download free pdf case interview maths cheat sheet

2. Case interview maths practice questions

If you’d like some examples of case interview maths questions, then this is the section for you!

Doing maths calculations is typically just one step in a broader case, and so the most realistic practice is to solve problems within the context of a full case.

So, below we’ve compiled a set of maths questions that come directly from  case interview examples  published by McKinsey and Bain. 

We recommend that you try solving each problem yourself before looking at the solution. 

Now here’s the first question!

2.1 Payback period - McKinsey case example

This is a paraphrased version of question 3 on  McKinsey’s Beautify practice case :

How long will it take for your client to make back its original investment, given the following data?

• After the investment, you’ll get 10% incremental revenue
• You’ll have to invest €50m in IT, €25m in training, €50m in remodeling, and €25m in inventory
• Annual costs after the initial investment will be €10m 
• The client’s annual revenues are €1.3b

Note: take a moment to try solving this problem yourself, then you can get the answer under  question 3 on McKinsey’s website . 

2.2 Cost reduction - McKinsey case example

This is a paraphrased version of question 2 on  McKinsey’s Diconsa practice case :

How much money in total would families in rural Mexico save per year if they could pick up benefits payments from Diconsa stores?

• Pick up currently costs 50 pesos per month for each family
• If pick up were available at Diconsa stores, the cost would be reduced by 30%
• Assume that the population of Mexico is 100m 
• 20% of Mexico’s population is in rural areas, and half of these people receive benefits
• Assume that all families in Mexico have 4 members

Note: take a moment to try solving this problem yourself, then you can get the answer under  question 2 on McKinsey’s website . 

2.3 Product launch - McKinsey case maths example

This is a paraphrased version of question 2 on  McKinsey’s Electro-Light practice case :

What share of the total electrolyte drink market would the client need in order to break even on their new Electro-Light drink product?

• The target price for Electro-Light is $2 for each 16 oz (1/8th gallon) bottle
• Electro-Light would require $40m in fixed costs
• Each bottle of Electro-Light costs $1.90 to produce and deliver
• The electrolyte drink market makes up 5% of the US sports-drink market
• The US sports-drink market sells 8b gallons of beverages per year

2.4 Pricing strategy - McKinsey case maths example

This is a paraphrased version of question 3 on  McKinsey’s Talbot Trucks practice case :

What is the highest price Talbot Trucks can charge for their new electric truck, such that the total cost of ownership is equal to diesel trucks? 

• Assume the total cost of ownership for all trucks consists of these 5 components: driver, depreciation, fuel, maintenance, other. 
• A driver costs €3k/month for diesel and electric trucks
• Diesel trucks and electric trucks have a lifetime of 4 years, and a €0 residual value
• Diesel trucks use 30 liters of diesel per 100km, and diesel fuel costs €1/liter
• Electric trucks use 100kWh of energy per 100km, and energy costs €0.15/kWh
• Annual maintenance is €5k for diesel trucks and €3k for electric trucks
• Other costs (e.g. insurance, taxes, and tolls) is €10k for diesel trucks and €5k for electric trucks
• Diesel trucks cost €100k

2.5 Inclusive hiring - McKinsey case maths example

This is a paraphrased version of question 3 on  McKinsey’s  Shops Corporation practice case :

How many female managers should be hired next year to reach the goal of 40% women executives in 10 years? 

• There are 300 executives now, and that number will be the same in 10 years
• 25% of the executives are currently women
• The career levels at the company (from junior to senior) are as follows: professional, manager, director, executive
• In the next 5 years, ⅔ of the managers that are hired will become directors. And in years 6-10, ⅓ of those directors will become executives. 
• Assume 50% of the hired managers will leave the company
• Assume that everything else in the company’s pipeline stays the same after hiring the new managers

2.6 Breakeven point - Bain case maths example

This is a paraphrased version of the calculation portion of  Bain’s Coffee Shop Co. practice case : 

How many cups of coffee does a newly opened coffee shop need to sell in the first year in order to break even?

• The price of coffee will be £3/cup
• Each cup of coffee costs £1/cup to produce 
• It will cost £245,610 to open the coffee shop
• It will cost £163,740/year to run the coffee shop

Note: take a moment to try solving this problem yourself, then you can get the answer  on Bain’s website .

2.7 Driving revenue - Bain case maths example

This is a paraphrased version of the calculation part of  Bain’s FashionCo practice case : 

Which option (A or B) will drive the most revenue this year?

Option A: Rewards program

• There are 10m total customers
• The avg. annual spend per person is $100 before any sale (assume sales are evenly distributed throughout the year)
• Customers will pay a $50 one-time activation fee to join the program
• 25% of customers will join the rewards program this year
• Customers who join the rewards program always get 20% off

Option B: Intermittent sales

• For 3 months of the year, all products are discounted by 20%
• During the 3 months of discounts, purchases will increase by 100%

3. Case maths apps and tools

In the case maths problems in the previous section, there were essentially 2 broad steps: 

• Set up the equation
• Perform the calculations

After learning the formulas earlier in this guide, you should be able to manage the first step. But performing the mental maths calculations will probably take some more practice. 

Mental maths is a muscle. But for most of us, it’s a muscle you haven’t exercised since high school. As a result, your  case interview preparation  should include some maths training.

If you don't remember how to calculate basic additions, substractions, divisions and multiplications without a calculator, that's what you should focus on first.

In addition, Khan Academy has also put together some helpful resources. Here are the ones we recommend if you need an in-depth arithmetic refresher:

• Additions and subtractions
• Multiplications and divisions
• Percentages

Scientific notation

Once you're feeling comfortable with the basics you'll need to regularly exercise your mental maths muscle in order to become as fast and accurate as possible.

• Preplounge's maths tool . This web tool is very helpful to practice additions, subtractions, multiplications, divisions and percentages. You can both sharpen your precise and estimation maths with it.
• Victor Cheng's maths tool . This tool is similar to the Preplounge one, but the user experience is less smooth in our opinion.
• Mental math cards challenge app  (iOS). This mobile app lets you work on your mental maths easily on your phone. Don't let the old school graphics deter you from using it. The app itself is actually very good.
• Mental math games  (Android). If you're an Android user this one is a good substitute to the mental math cards challenge one on iOS.

4. Case interview maths tips and tricks

4.1. calculators are not allowed in case interviews.

If you weren’t aware of this rule already, then you’ll need to know this: 

Calculators are not allowed in case interviews. This applies to both in-person and virtual case interviews. And that’s why it’s crucial for candidates to practice doing mental maths quickly and accurately before attending a case interview. 

And unfortunately, doing calculations without a calculator can be really slow if you use standard long divisions and multiplications. 

But there are some tricks and techniques that you can use to simplify calculations and make them easier and faster to solve in your head. That’s what we’re going to cover in the rest of this section. 

Let’s begin with rounding numbers.

4.2. Round numbers for speed and accuracy

The next 5 subsections all cover tips that will help you do mental calculations faster. Here’s an overview of each of these tips: 

And the first one that we’ll cover here is rounding numbers. 

The tricky thing about rounding numbers is that if you round them too much you risk:

• Distorting the final result
• Or your interviewer telling you to round the numbers less

Rounding numbers is more of an art than a science, but in our experience, the following two tips tend to work well:

• We usually recommend that you avoid rounding numbers by more than +/- 10%. This is a rough rule of thumb but gives good results based on conversations with past candidates.
• You also need to alternate between rounding up and rounding down so the effects cancel out. For instance, if you're calculating A x B, we would recommend rounding A UP, and rounding B DOWN so the rounding balances out.

Note that you won't always be able to round numbers. In addition, even after you round numbers the calculations could still be difficult. So let's go through a few other tips that can help in these situations.

4.3. Abbreviate large numbers

Large numbers are difficult to deal with because of all the 0s. To be faster you need to use notations that enable you to get rid of these annoying 0s. We recommend you use labels and the scientific notation if you aren't already doing so.

Labels (k, m, b)

Use labels for thousand (k), million (m), and billion (b). You'll write numbers faster and it will force you to simplify calculations. Let's use 20,000 x 6,000,000 as an example.

• No labels: 20,000 x 6,000,000 = ... ???
• Labels: 20k x 6m = 120k x m = 120b

This approach also works for divisions. Let's try 480,000,000,000 divided by 240,000,000.

• No labels: 480,000,000,000 / 240,000,000 = ... ???
• Labels: 480b / 240m = 480k / 240 = 2k

When you can't use labels, the scientific notation is a good alternative. If you're not sure what this is, you're really missing out. But fortunately, Khan Academy has put together a good primer on that topic  here .

• Multiplication example: 600 x 500 = 6 x 5 x 102 X 102 = 30 x 104 = 300,000 = 300k
• Division example: (720,000 / 1,200) / 30 = (72 / (12 x 3)) x (104 / (102 x 10)) = (72 / 36) x (10) = 20

When you're comfortable with labels and the scientific notation you can even start mixing them:

• Mixed notation example: 200k x 600k = 2 x 6 x 104 x m = 2 x 6 x 10 x b = 120b

4.4. Use factoring to make calculations simpler

To be fast at maths, you need to avoid writing down long divisions and multiplications because they take a LOT of time. In our experience, doing multiple easy calculations is faster and leads to less errors than doing one big long calculation.

A great way to achieve this is to factor and expand expressions to create simpler calculations. If you're not sure what the basics of factoring and expanding are, you can use Khan Academy again  here  and  here . Let's start with factoring.

Simple numbers: 5, 15, 25, 50, 75, etc.

In case interviews some numbers come up very frequently, and it's useful to know shortcuts to handle them. Here are some of these numbers: 5, 15, 25, 50, 75, etc. 

These numbers are common, but not particularly easy to handle.

For instance, consider 36 x 25. It's not obvious what the result is. And a lot of people would need to write down the multiplication on paper to find the answer. However there's a MUCH faster way based on the fact that 25 = 100 / 4. Here's the fast way to get to the answer:

• 36 x 25 = (36 / 4) x 100 = 9 x 100 = 900

Here's another example: 68 x 25. Again, the answer is not immediately obvious. Unless you use the shortcut we just talked about; divide by 4 first and then multiply by 100:

• 68 x 25 = (68 / 4) x 100 = 17 x 100 = 1,700

Factoring works both for multiplications and divisions. When dividing by 25, you just need to divide by 100 first, and then multiply by 4. In many situations this will save you wasting time on a long division. Here are a couple of examples:

• 2,600 / 25 = (2,600 / 100) x 4 = 26 x 4 = 104
• 1,625 / 25 = (1,625 / 100) x 4 = 16.25 x 4 = 65

The great thing about this factoring approach is that you can actually use it for other numbers than 25. Here is a list to get you started:

• 2.5 = 10 / 4
• 7.5 = 10 x 3 / 4
• 15 = 10 x 3 / 2
• 25 = 100 / 4
• 50 = 100 / 2
• 75 = 100 x 3 / 4

Once you're comfortable using this approach you can also mix it with the scientific notation on numbers such as 0.75, 0.5, 0.25, etc.

Factoring the numerator / denominator

For divisions, if there are no simple numbers (e.g. 5, 25, 50, etc.), the next best thing you can do is to try to factor the numerator and / or denominator to simplify the calculations. Here are a few examples:

• Factoring the numerator: 300 / 4 = 3 x 100 / 4 = 3 x 25 = 75
• Factoring the denominator: 432 / 12 = (432 / 4) / 3 = 108 / 3 = 36
• Looking for common factors: 90 / 42 = 6 x 15 / 6 x 7 = 15 / 7

4.5. Expand numbers to make calculations easier

Another easy way to avoid writing down long divisions and multiplications is to expand calculations into simple expressions.

Expanding with additions

Expanding with additions is intuitive to most people. The idea is to break down one of the terms into two simpler numbers (e.g. 5; 10; 25; etc.) so the calculations become easier. Here are a couple of examples:

• Multiplication: 68 x 35 = 68 x (10 + 25) = 680 + 68 x 100 / 4 = 680 + 1,700 = 2,380
• Division: 705 / 15 = (600 + 105) / 15 = (15 x 40) / 15 + 105 / 15 = 40 + 7 = 47

Notice that when expanding 35 we've carefully chosen to expand to 25 so that we could use the helpful tip we learned in the factoring section. You should keep that in mind when expanding expressions.

Expanding with subtractions

Expanding with subtractions is less intuitive to most people. But it's actually extremely effective, especially if one of the terms you are dealing with ends with a high digit like 7, 8 or 9. Here are a couple of examples:

• Multiplication: 68 x 35 = (70 - 2) x 35 = 70 x 35 - 70 = 70 x 100 / 4 + 700 - 70 = 1,750 + 630 = 2,380
• Division: 570 / 30 = (600 - 30) / 30 = 20 - 1= 19

4.6. Simplify growth rate calculations

You will also often have to deal with growth rates in case interviews. These can lead to extremely time-consuming calculations, so it's important that you learn how to deal with them efficiently.

Multiply growth rates together

Let's imagine your client's revenue is $100m. You estimate it will grow by 20% next year and 10% the year after that. In that situation, the revenues in two years will be equal to:

• Revenue in two years = $100m x (1 + 20%) x (1 + 10%) = $100m x 1.2 x 1.1 = $100m x (1.2 + 0.12) = $100m x 1.32 = $132m

Growing at 20% for one year followed by 10% for another year therefore corresponds to growing by 32% overall.

To find the compound growth you simply need to multiply them together and subtract one: (1.1 x 1.2) - 1= 1.32 - 1 = 0.32 = 32%. This is the quickest way to calculate compound growth rates precisely.

Note that this approach also works perfectly with negative growth rates. Let's imagine for instance that sales grow by 20% next year, and then decrease by 20% the following year. Here's the corresponding compound growth rate:

• Compound growth rate = (1.2 x 0.8) - 1 = 0.96 - 1 = -0.04 = -4%

See how growing by 20% and then shrinking by 20% is not equal to flat growth (0%). This is an important result to keep in mind.

Estimate compound growth rates

Multiplying growth rates is a really efficient approach when calculating compound growth over a short period of time (e.g. 2 or 3 years).

But let's imagine you want to calculate the effect of 7% growth over five years. The precise calculation you would need to do is:

• Precise growth rate: 1.07 x 1.07 x 1.07 x 1.07 x 1.07 - 1 = ... ???

Doing this calculation would take a lot of time. Fortunately, there's a useful estimation method you can use. You can approximate the compound growth using the following formula:

• Estimate growth rate = Growth rate x Number of years

In our example:

• Estimate growth rate: 7% x 5 years = 35%

In reality if you do the precise calculation (1.075 - 1) you will find that the actual growth rate is 40%. The estimation method therefore gives a result that's actually quite close. In case interviews your interviewer will always be happy with you taking that shortcut as doing the precise calculation takes too much time.

4.7. Memorise key statistics

In addition to the tricks and shortcuts we’ve just covered, it can also help to memorise some common statistics. 

For example, it would be good to know the population of the city and country where your target office is located. 

In general, this type of data is useful to know, but it's particularly important when you face  market sizing questions . 

So, to help you learn (or refresh on) some important numbers, here is a short summary:

Of course this is not a comprehensive set of numbers, so you may need to tailor it to your own location or situation.   

5. Practice with experts

Sitting down and working through the maths formulas we've gone through in this article is a key part of your case interview preparation. But it isn’t enough.

At some point you’ll want to practise making calculations under interview conditions.

You can try to do this with friends or family. However, if you really want the best possible preparation for your case interview, you'll also want to work with ex-consultants who have experience running interviews at McKinsey, Bain, BCG, etc.

If you know anyone who fits that description, fantastic! But for most of us, it's tough to find the right connections to make this happen. And it might also be difficult to practice multiple hours with that person unless you know them really well.

Here's the good news. We've already made the connections for you. We’ve created a coaching service where you can do mock interviews 1-on-1 with ex-interviewers from MBB firms. Learn more and start scheduling sessions today.

• The 1%: Conquer Your Consulting Case Interview
• Consulting Career Secrets
• Cover Letter & Resume
• McKinsey Solve Game (Imbellus)
• BCG Online Case (+ Pymetrics, Spark Hire)
• Bain Aptitude Tests (SOVA, Pymetrics, HireVue)
• Kearney Recruitment Test
• All-in-One Case Interview Preparation
• Industry Cheat Sheets
• Structuring & Brainstorming
• Data & Chart Interpretation
• Case Math Mastery
• McKinsey Interview Academy
• Brainteasers

Case Interview Examples (2024): A Collection from McKinsey and Others

Last Updated on January 11, 2024

Whenever you prepare for case interviews, you have to practice as realistically as possible and mimic the real case study interview at McKinsey , BCG , Bain , and others. One way to do this and make your preparation more effective is to practice real cases provided by the firms you apply to.

It will help you to understand what the differences are across firms, how they structure and approach their cases, what dimensions are important to them, and what solutions they consider to be strong.

Below is a steadily expanding selection of real case interview examples provided by different management consulting firms.

Before wasting your money on case interview collection books that use generic cases, use original cases first. Additionally, use professional case coaches, who interviewed for the top firms , to mimic the real interview experience and get real, actionable feedback to improve.

Please be aware that cases are just one part of a typical consulting interview. It is equally important to prepare for behavioral and fit interview questions .

McKinsey Case Interview Examples

• Loravia – Transforming a national education system
• SuperSoda – Electro-light product launch
• GlobaPharm – Pharma R&D
• Bill & Melinda Gates Foundation – Diconsa financial services offering
• Beautify – Customer approach
• Shops – DEI strategy
• Talbot Trucks – Electric truck development
• Conservation Forever – Nature conservation

We have written a detailed article on the McKinsey application process, the McKinsey interview timeline, the typical McKinsey case interview, and the McKinsey Personal Experience interview here . You can expect similar cases regardless of your position (e.g. in a McKinsey phone case interview or interviewing for a McKinsey internship as well as a full-time BA, Associate, or Engagement Manager role).

Boston Consulting Group (BCG) Case interview Examples

• Consumer Goods – Climate strategy
• Banking – Client satisfaction
• Consumer Goods – IT strategy
• Chateau Boomerang – Written case

Bain and Company case interview examples

• NextGen Tech
• FashionCo .

Ace the case interview with our dedicated preparation packages.

Deloitte Case Interview Examples

• Federal Agency – Engagement strategy
• Federal Benefits Provider – Strategic vision
• Apparel – Declining market share
• Federal Finance Agency – Architecture strategy
• MedX – Smart pill bottle
• Federal Healthy Agency – Finance strategy
• LeadAuto – Market expansion
• Federal Bureau – Talent management

Strategy& Case Interview Examples

• Strategy& tips and examples  (case examples included )

Accenture Case Interview Examples

• Accenture interview tips and examples (case examples included )

Kearney Case Interview Examples

• Promotional planning

Roland Berger Case Interview Examples

• Transit-oriented development Part 1
• Transit-oriented development Part 2
• 3D printed hip implants Part 1
• 3D printed hip implants Part 2

Oliver Wyman Case Interview Examples

• Wumbleworld – theme park
• Aqualine – boats

LEK Case Interview Examples

• Video case interview example (currently unavailable)
• Market sizing video example
• Brainteaser (scroll to the bottom of the page)

Simon Kucher Case Interview Examples

• Smart phone pricing

OC&C Case Interview Examples

• Imported whiskey in an emerging market – business strategy
• Leisure clubs – data interpretation

Capital One Case Interview Examples

• How to crack case interviews with Capital One (includes case examples)

Bridgespan Case Interview Examples

• Robinson Philanthropy – Strategy
• Reach for the Stars – Student success
• Home Nurses for New Families – Expansion strategy
• Venture Philanthropy – Charity

Consulting Clubs Case Interview Books

Contact us at [email protected] for a collection of consulting club case interview books (from Harvard, ESADE, LBS, Columbia, etc.).

How We Help You Ace Your Case Interviews

We have specialized in placing people from all walks of life with different backgrounds into top consulting firms both as generalist hires as well as specialized hires and experts. As former McKinsey consultants and interview experts, we help you by

• tailoring your resume and cover letter to meet consulting firms’ highest standards
• showing you how to pass the different online assessments and tests for McKinsey , BCG , and Bain
• showing you how to ace McKinsey interviews and the PEI with our video academy
• coaching you in our 1-on-1 sessions to become an excellent case solver and impress with your fit answers (90% success rate after 5 sessions)
• preparing your math to be bulletproof for every case interview
• helping you structure creative and complex case interviews
• teaching you how to interpret charts and exhibits like a consultant
• providing you with cheat sheets and overviews for 27 industries .

Reach out to us if you have any questions! We are happy to help and offer a tailored program to help you break into consulting.

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Florian spent 5 years with McKinsey as a senior consultant. He is an experienced consulting interviewer and problem-solving coach, having interviewed 100s of candidates in real and mock interviews. He started StrategyCase.com to make top-tier consulting firms more accessible for top talent, using tailored and up-to-date know-how about their recruiting. He ranks as the most successful consulting case and fit interview coach, generating more than 500 offers with MBB, tier-2 firms, Big 4 consulting divisions, in-house consultancies, and boutique firms through direct coaching of his clients over the last 3.5 years. His books “The 1%: Conquer Your Consulting Case Interview” and “Consulting Career Secrets” are available via Amazon.

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• The McKinsey Solve Assessment - 2023 Guide with Redrock Case Update

McKinsey’s Solve assessment has been making candidates sweat ever since it was initially trialled at the firm’s London office back in 2017 - and things have gotten even more difficult since the new version launched in Spring 2023 added the Redrock case study.

Since its initial roll-out, the Solve assessment is definitely the most idiosyncratic, but also the most advanced, of the screening tests used by the MBB firms.

It can be hard to understand how an ecology-themed video game can tell McKinsey whether you’ll make a good management consultant, let alone know how to prepare yourself to do well in that game. When you consider that McKinsey are potentially cutting 70%+ of the applicant pool based on this single test, you can hardly blame applicants for being worried.

Matters are definitely not helped by the dearth of reliable information about what could very well be - with a top-tier consulting job on the line - the most important test you will take over your entire career. This was already true with the version of Solve that had been around for a few years, let alone the new one.

What information is available online is then often contradictory. In particular, there is a huge amount of disagreement as to whether it is actually possible for you to meaningfully prepare for the Solve assessment - before you’ve even considered how to go about that preparation. There is also a lot of confusion and inaccuracy around the new Redrock Case - largely as it is so recent as an addition and individual test takers tend to misremember details.

Luckily, we at MCC have been interviewing test takers both before and after the Redrock Case rollout and following up to see which strategies and approaches actually work to push individuals through to interview.

Here, we’ll explain that it is indeed possible to prepare effectively for both versions of Solve and give you some ideas for how you can get started. Understanding how the Solve assessment works, what it tests you for and how is critical for all but the most hurried preparations.

This article makes for a great introduction to the Solve assessment. However, if you are going to be facing this aptitude test yourself and want full information and advice for preparation, then you should ideally get our full PDF guide:

MCC McKinsey Solve Guide

What is the McKinsey Solve assessment?

In simple terms, the McKinsey Solve assessment is a set of ecology-themed video games. In these games, you must do things like build food chains, protect endangered species, manage predator and prey populations and potentially diagnose diseases within animal populations or identify natural disasters.

Usually, you will be given around 70 minutes to complete two separate games, spending about the same amount of time on each.

Until recently, these games had uniformly been Ecosystem Building and Plant Defence. However, since Spring 2023, McKinsey has been rolling out a new version across certain geographies. This replaces the Plant Defence game with the new Redrock Case Study. Some other games have also been run as tests.

We’ll run through a little more on all these games below to give you an idea of what you’ll be up against for both versions and possible new iterations.

In the past, candidates had to show up to a McKinsey office and take what was then the Digital Assessment or PSG on a company computer. However, candidates are now able to take the re-branded Solve assessment at home on their own computers.

Test-takers are allowed to leverage any assistance they like (you aren’t spied on through your webcam as you would be with some other online tests), and it is common to have a calculator or even another computer there to make use of.

Certainly, we strongly advise every candidate to have at least a pen, paper and calculator on their desk when they take the Solve assessment.

Common Question: Is the Solve assessment the same thing as the PSG?

In short, yes - “Solve” is just the newer name for the McKinsey Problem Solving Game.

We want to clear up any potential confusion right at the beginning. You will hear this same screening test called a few different things in different places. The Solve moniker itself is a relatively recent re-branding by McKinsey. Previously, the same test was known as either the Problem Solving Game (usually abbreviated to PSG) or the Digital Assessment. You will also often see that same test referred to as the Imbellus test or game, after the firm that created the first version.

You will still see all these names used across various sites and forums - and even within some older articles and blog posts here on MyConsultingCoach. McKinsey has also been a little inconsistent on what they call their own assessment internally. Candidates can often become confused when trying to do their research, but you can rest assured that all these names refer to the same screening test - though folk might be referring to either the legacy or Redrock versions.

Why does the assessment exist?

As with Bain, BCG and other major management consulting firms, McKinsey receives far far more applications for each position than they can ever hope to interview. Compounding this issue is that case interviews are expensive and inconvenient for firms like McKinsey to conduct. Having a consultant spend a day interviewing just a few candidates means disrupting a whole engagement and potentially having to fly that consultant back to their home office from wherever their current project was located. This problem is even worse for second-round interviews given by partners.

Thus, McKinsey need to cut down their applicant pool as far as possible, so as to shrink the number of case interviews they need to give without losing the candidates they actually want to hire. Of course, they want to then accomplish this as cheaply and conveniently as possible.

The Problem Solving Test (invariably shortened to PST) had been used by McKinsey for many years. However, it had a number of problems that were becoming more pronounced over time, and it was fundamentally in need of replacement. Some of these were deficiencies with the test itself, though many were more concerned with how the test fitted with the changing nature of the consulting industry.

The Solve assessment has been developed and iterated by the specialist firm Imbellus ( now owned by gaming giant Roblox ) to replace the long-standing PST in this screening role and offers solutions to those problems with its predecessor.

We could easily write a whole article on what McKinsey aimed to gain from the change, but the following few points cover most of the main ideas:

• New Challenges: In particular, the changing demands of the consulting industry mean that McKinsey is increasingly seeking a new kind of hire. Previously, candidates were largely coming out of MBAs or similar business-focussed backgrounds, and so the PST’s quickfire business questions in a familiar GMAT-style format were perfectly sufficient to select consultants for what were fairly non-technical generalist consulting roles. However, clients have been bringing ever more technical projects to firms like McKinsey. This has led to the increasing internal segmentation of consulting firms - to create specialist digital divisions , for example. Even in generalist consulting, there is also now an increasing recognition of the utility of individuals with real depth of knowledge coming out of either industry or non-business academic routes like PhD programmes (you can read more about getting into consulting without an MBA here ). This feeds through to change what constitutes a good aptitude test for McKinsey. Without the once-crucial MBA, McKinsey can’t assume the same kind of detailed business knowledge. They also ideally want a single test that can be given to all kinds of prospective specialist consultants as well as generalists.
• Fairness and the Modern Context: The covid pandemic necessitated at-home aptitude testing. However, even before that, there were pressures for a move to a largely remote recruitment process. Online testing - versus real-life papers, sat on location - dramatically reduces the amount of travel required of candidates. This allows McKinsey to cast a wider net, providing more opportunities to those living away from hub cities, whilst also hugely reducing the carbon footprint associated with the McKinsey selection process.
• Gaming the System: More pragmatically, the Solve assessment promises to simply do the job of selecting the right candidates better than the PST. All things being equal, just increasing the candidate pool with an online test should lead to better quality candidates emerging to top the cohort. However, the Solve assessment also promises to do a better job at ranking those candidates in line with their actual abilities. A large part of this is that it is a much harder test to “game” than the PST was, where highly effective prep resources were available and readily allowed a bad candidate with good preparation to do better than a good candidate. The fact that game parameters change for every individual test-taker also cuts down the risk of some candidates having an unfair advantage by receiving details of the tests being used from those who have already taken them. The recent move towards the Redrock version also helps McKinsey stay ahead of those developing prep resources for the legacy Solve assessment.
• Cost Cutting: A major advantage of scrapping the old pen-and-paper PST is that the formidable task of thinning down McKinsey’s applicant pool can be largely automated. No test rooms and invigilation staff need to be organised and no human effort is required to devise, transport, catalogue and mark papers. This is especially impactful when we consider that the Solve assessment’s advanced “process scoring” function allows the kind of nuanced filtering of candidates that would usually require something like an essay-based exam to accomplish, rather than the multiple-choice PST. Imbellus has provided this without the huge time and effort from expert human markers that would usually be required - so McKinsey has gained ability whilst eliminating cost and inconvenience.

How is the Solve Assessment used by McKinsey?

McKinsey's own account of how the Solve assessment is used in selection can be seen in the following video:

Whilst some offices initially stuck with the old PST, the legacy Solve assessment was soon rolled out globally and is given universally to candidates for roles at pretty well every level of the hierarchy. Certainly, if you are a recent grad from a Bachelor’s, MBA, PhD or similar, or a standard experienced hired, you can expect to be asked to complete the Solve assessment.

Likewise, we can expect the new Redrock Case Study version to be rolled out globally - though at this point it seems you might be given either (especially as McKinsey has been having significant technical problems with this new online case study) and so should be ready for both.

At present, it seems that only those applying for very senior positions or perhaps those with particularly strong referrals and/or connections are allowed to skip the test. Even this will be office-dependent.

As noted above, one of the advantages of the Solve assessment is that it can be given to all of McKinsey’s hires. Thus, you can expect to be run into the same games whether you are applying as a generalist consultant or to a specialist consulting role - with McKinsey Digital , for example.

The takeaway here is that, if you are applying to McKinsey for any kind of consulting role, you should be fully prepared to sit the Solve Assessment!

Where does the Solve assessment fit into the recruitment process?

You can expect to receive an invitation to take the Solve assessment shortly after submitting your resume.

It seems that an initial screen of resumes is made, but that most individuals who apply are invited to take the Solve assessment.

Any initial screen is not used to make a significant cut of the candidate pool, but likely serves mostly to weed out fraudulent applications from fake individuals (such as those wishing to access the Solve assessment more than once so they practice...) and perhaps to eliminate a few individuals who are clearly far from having the required academic or professional background or have made a total mess of their resumes.

Your email invitation will generally give you either one or two weeks to complete the test, though our clients have seen some variation here - with one individual being given as little as three days.

Certainly, you should plan to be ready to sit the Solve assessment within one week of submitting your resume!

Once you have completed the test, McKinsey explain on their site that they look at both your test scores and resume (in more detail this time) to determine who will be invited to in-person case interviews. This will only be around 30% of the candidates who applied - possibly even less.

One thing to note here is that you shouldn’t expect a good resume to make up for bad test scores and vice versa. We have spoken to excellent candidates whose academic and professional achievements were not enough to make up for poor Solve performance. Similarly, we don’t know of anyone invited to interview who hadn’t put together an excellent resume.

Blunty, you need great Solve scores and a great resume to be advanced to interview.

Your first port of call to craft the best possible resume to land your invitation to interview is our excellent free consulting resume guide .

Impress your interviewer

What does the solve assessment test for.

Whilst information on the Solve assessment can be hard to come by, Imbellus and McKinsey have at least been explicit on what traits the test was designed to look for. These are:

• Critical Thinking : making judgements based on the objective analysis of information
• Decision Making : choosing the best course of action, especially under time pressure or with incomplete information
• Metacognition : deploying appropriate strategies to tackle problems efficiently
• Situational Awareness : the ability to interpret and subsequently predict an environment
• Systems Thinking : understanding the complex causal relationships between the elements of a system

Equally important to understanding the raw fact of the particular skillset being sought out, though, is understanding the very idiosyncratic ways in which the Solve assessment tests for these traits. Let's dive deeper:

Process Scores

Perhaps the key difference between the Solve assessment and any other test you’ve taken before is Imbellus’s innovation around “process scores”.

To explain, when you work through each of the games, the software examines the solutions you generate to the various problems you are faced with. How well you do here is measured by your “product score”.

However, scoring does not end there. Rather, Imbellus’s software also constantly monitors and assesses the method you used to arrive at that solution. The quality of the method you used is then captured in your “process score”.

To make things more concrete here, if you are playing the Ecosystem Building game, you will not only be judged on whether the ecosystem you put together is self-sustaining. You will also be judged on the way you have worked in figuring out that ecosystem - presumably, on how efficient and organised you were. The program tracks all your mouse clicks and other actions and will thus be able to capture things like how you navigate around the various groups of species, how you place the different options you select, whether you change your mind before you submit the solution and so on.

You can find more detail on these advanced aspects of the Solve assessment and the innovative work behind it in the presentation by Imbellus founder Rebecca Kantar in the first section of the following video:

Compared to other tests, this is far more like the level of assessment you face from an essay-based exam, where the full progression of your argument towards a conclusion is marked - or a maths exam, where you are scored on your working as well as the final answer (with, of course, the major advantage that there is no highly qualified person required to mark papers).

Clearly, the upshot of all this is that you will want to be very careful how you approach the Solve assessment so you generally think before you act and show yourself in a very rational, rigorous, ordered light.

We have some advice for how to help look after your process score in our PDF Guide to the McKinsey Solve Assessment .

A Different Test for Every Candidate

Another remarkable and seriously innovative aspect of the Solve assessment is that no two candidates receive exactly the same test.

Imbellus automatically varies the parameters of the different games to be different for each individual test-taker so that each will be given a meaningfully different game to everyone else’s.

Within a game, this might mean a different terrain setting, having a different number of species or different types of species to work with or more or fewer restrictions on which species will eat which others.

Consequently, even if your buddy takes the assessment for the same level role at the same office just the day before you do, whatever specific strategy they used in their games might very well not work for you.

This is an intentional feature designed to prevent test takers from sharing information with one another and thus advantaging some over others. At the extreme, this feature would also be a robust obstacle to any kind of serious cheating.

If cheating seems far-fetched to some readers, remember how competitive the race to land jobs at top consulting firms is. We at MCC have previously been made aware of individuals purporting to sell the answers to consulting screening tests on the black market. If cheating is possible, there is always a risk it can happen.

To manage to give every candidate a different test and still be able to generate a reliable ranking of those candidates across a fundamental skillset, without that test being very lengthy, is a considerable achievement from Imbellus. At high level, this would seem to be approximately equivalent to reliably extracting a faint signal from a very noisy background on the first attempt almost every time.

Taking this level of trouble - and presumed additional expense - shows how seriously McKinsey take the task of ensuring reliable, fair selection by trying to eliminate anything like cheating, or even just normal information flow between candidates, that might have happened with something like the PST.

(Note that we are yet to confirm this also happens with the new Redrock Case Study, but it seems to be set up to allow for easy changes to be made to the numerical values describing the case, so we assume there will be the same kind of variation.)

What does it all mean for you?

Understanding what you are being tested for is obviously crucial in preparing yourself for any kind of assessment. For the Solve assessment, this is especially true the longer the time you have to prepare.

Over longer preps, an understanding of exactly the kind of traits being examined allows you to select skill-building activities that should actually show transference in boosting your test performance.

Of course,  this begs the obvious question…

Can I Prepare for the McKinsey Solve Assessment?

In short, yes you can - and you should!

As noted previously, there has previously been a lot of disagreement over whether it is really possible to prep for the Solve assessment in a way that actually makes a difference.

Especially regarding the legacy version, there has been a widespread idea that the Solve assessment functions as something like an IQ test, so that preparation beyond very basic familiarisation to ensure you don’t panic on test day will not do anything to reliably boost your scores (nobody is going to build up to scoring an IQ of 200 just by doing practice tests, for example).

This rationale says that the best you can do is familiarise yourself with what you are up against to calm your nerves and avoid misunderstanding instructions on test day. However, this school of thought says there will be minimal benefit from practice and/or skill building.

The utility of preparation has become a little clearer with the addition of the Redrock Case Study to the new version of Solve. Its heavily quantitative nature, strong time pressure and structure closely resembling a traditional business case make for a clearer route to improvement.

However, as we explain in more detail in our PDF guide to the Solve assessment the idea that any aspect of either version of Solve can't be prepared for has been based on some fundamental misunderstandings about what kind of cognitive traits are being tested. Briefly put, the five key skills the Solve assessment explicitly examines are what are known as higher-order thinking skills.

Crucially, these are abilities that can be meaningfully built over time.

McKinsey and Imbellus have generally advised that you shouldn’t prepare. However, this is not the same as saying that there is no benefit in doing so. McKinsey benefits from ensuring as even a playing field as possible. To have the Solve test rank candidates based purely on their pre-existing ability, they would ideally wish for a completely unprepared population.

There has been a bit of variation in the games included in the Solve assessment/PSG over the years and what specific form those games take. Imbellus and McKinsey have experimented with whole new configurations as well as making smaller, iterative tweaks over time. That being said, the new 2023 Redrock case is by far the largest change to Solve since that assessment's genesis back in 2017.

Given that innovation seems to continue (especially with the lengthy feedback forms some candidates are being asked to sit after sitting the newest iteration), there is always the chance you might be the first to receive something new.

However, our surveys of, and interviews with, those taking the Solve assessment - both before and after recent changes - mean we can give you a good idea of what to expect if you are presented with either the legacy or the Redrock version of Solve.

We provide much more detailed explanation of each of the games in our Solve Assessment PDF Guide - including guidance on optimal scenarios to maximise your performance. Here, though, we can give a quick overview of each scenario:

Ecosystem Building

In this scenario, you are asked to assemble a self-sustaining ecosystem in either an aquatic, alpine or jungle environment (though do not be surprised if environments are added, as this should be relatively easy to do without changing the underlying mechanics).

The game requires you to select a location for your ecosystem. Several different options are given, all with different prevailing conditions. You then have to select a number of different plant and animal species to populate a functioning food chain within that location.

In previous versions of the game, you would have had to fit as many different species as possible into a functioning food chain. However, recent iterations of the Solve assessment require a fixed number of eight species to be selected.

Species selection isn’t a free-for-all. You must ensure that all the species you select are compatible with one another - that the predator species you select are able to eat the prey you have selected for them etc. All the species must also be able to survive in the conditions prevailing at the location you have selected.

So far, this sounds pretty easy. However, the complexity arises from the strict rules around the manner and order in which the different species eat one another. We run through these in detail in our guide, with tips for getting your food chain right. However, the upshot is that you are going to have to spend some significant time checking your initial food chain - and then likely iterating it and replacing one or more species when it turns out that the food chain does not adhere to the eating rules.

Once you have decided on your food chain, you simply submit it and are moved on to the next game. In the past, test takers were apparently shown whether their solution was correct or not, but this is no longer the case.

Test-takers generally report that this game is the easier of the two, whether it is paired with the Plant Defence game in the legacy Solve or the Redrock Case Study in the new version. Candidates will not usually struggle to assemble a functioning ecosystem and do not find themselves under enormous time pressure. Thus, we can assume that process scores will be the main differentiator between individuals for this component of the Solve assessment.

For ideas on how to optimise your process score for this game, you can see our PDF Solve guide .

Plant Defence

As mentioned, this game has been replaced with the Redrock Case Study in the new newer iteration of the Solve assessment, rolled out from Spring 2023. However you might still be asked to sit the legacy version, with this game, when applying to certain offices - so you should be ready for it!

This scenario tasks you with protecting an endangered plant species from invasive species trying to destroy it.

The game set-up is much like a traditional board game, with play taking place over a square area of terrain divided into a grid of the order of 10x10 squares.

Your plant is located in a square near the middle of the grid and groups of invaders - shown as rats, foxes or similar - enter from the edges of the grid before making a beeline towards your plant.

Your job then is to eliminate the invaders before they get to your plant. You do this by placing defences along their path. These can be terrain features, such as mountains or forests, that either force the invaders to slow down their advance or change their path to move around an obstacle. To actually destroy the invaders though, you use animal defenders, like snakes or eagles, that are able to deplete the groups of invaders as they pass by their area of influence.

Complication here comes from a few features of the game. In particular:

• You are restricted in terms of both the numbers of different kinds of defenders you can use and where you are allowed to place them. Thus, you might only have a couple of mountains to place and only be allowed to place these in squares adjacent to existing mountains.
• The main complication is the fact that gameplay is not dynamic but rather proceeds in quite a restricted turnwise manner. By this, we mean that you cannot place or move around your defences continuously as the invaders advance inwards. Rather, turns alternate between you and invaders and you are expected to plan your use of defences in blocks of five turns at once, with only minimal allowance for you to make changes on the fly as the game develops.

The plant defence game is split into three mini-games. Each mini-game is further split into three blocks of five turns. On the final turn, the game does not stop, but continues to run, with the invaders in effect taking more and more turns whilst you are not able to place any more defences or change anything about your set-up.

More and more groups of invaders pour in, and your plant will eventually be destroyed. The test with this “endgame” is simply how many turns your defences can stand up to the surge of invaders before they are overwhelmed.

As opposed to the Ecosystem Building scenario, there are stark differences in immediate candidate performance - and thus product score - in this game. Some test takers’ defences will barely make it to the end of the standard 15 turns, whilst others will survive 50+ turns of endgame before they are overwhelmed.

In this context, as opposed to the Ecosystem Building game typically preceding it, it seems likely that product score will be the primary differentiator between candidates.

We have a full discussion of strategies to optimise your defence placement - and thus boost your product score - in our Solve guide .

Redrock Case Study

This is the replacement for the Plant Defence game in the newest iteration of Solve.

One important point to note is that, where the Solve assessment contains this case study, you have a strict, separate time limit of 35 minutes for each half of the assessment. You cannot finish one game early and use the extra time in the other, as you could in the legacy Solve assessment.

McKinsey has had significant issues with this case study, with test takers noting several major problems. In particular:

• Glitches/crashes - Many test takers have had the Redrock Case crash on them. Usually, this is just momentary and the assessment returns to where it was in a second or two. If this happens to you, try to just keep calm and carry on. However, there are reports online of some candidates having the whole Solve assessment crash and being locked out as a result. If this happens, you should contact HR.
• Confusing interface - Candidates have routinely noted that Redrock's controls are confusing and seem poorly designed compared to the older Ecosystem Building game preceding it. This means that they can often lose time figuring out how to interact with the case.
• Confusing language - Related to the above is that the English used is often rather convoluted and sometimes poorly phrased. This can be challenging even for native English speakers but is even worse for those sitting Solve in their second language. It can make the initial instructions difficult to understand - compounding the previous interface problem. It can also make questions difficult, requiring a few readings to comprehend.
• Insufficient time - Clearly, McKinsey intended for Redrock to be time pressured. However, time is so scarce that pretty well nobody is getting through all the questions. This is plainly sub-optimal for McKinsey - as well as being stressful and disheartening for candidates. We would expect changes to be made to address this issue in future.

McKinsey are clearly aware of these issues, as they have been asking some test takers to complete substantial feedback surveys after sitting Redrock. Be aware, then, that this raises the likelihood of changes to the Redrock Case Study in the near term - meaning you should be ready to tackle something new.

For the time being, though, we can take you through the fundamentals of the current version of the Redrock Case Study. For more detail, see our freshly updated PDF Guide .

The Scenario

Whilst changes to the details are likely in future, the current Redrock Case Study is set on the Island of Redrock. This island is a nature reserve with populations of several species, including wolves and elk. Redrock's wolves are split into four packs, associated with four geographical locales. These packs predate the elk and depend upon them for food, such that there is a dynamic relationship between the population numbers of both species. Your job is to ensure ecological balance by optimising the numbers of wolves in the four packs, such that both wolves and elk can sustainably coexist.

The Questions

The Redrock case study's questions were initially split into three sections, but a fourth was later added. These sections break down as follows:

• Investigation - Here, you have access to the full description of the case, with all the data on the various animal populations. Your task is to efficiently extract all the most salient data points and drag-and-drop them to your "Research Journal" workspace area. This is important, as you subsequently lose access to all the information you don't save at this stage.
• Analysis - You must answer three numerical questions using information you saved in the Investigation section. This can include you dragging and dropping values to and from an in-game calculator.
• Report - Formerly the final section, you must complete a pre-written report on the wolf populations, including calculating numerical values to fill in gaps and using an in-game interface to make a chart to illustrate your findings. You will leverage information saved in the Investigation section, as well as answers calculated in the Analysis section.
• Case Questions - This section adds a further ten individual case questions. These are thematically similar to the preceding case, but are otherwise separate, not relying on any information from the previous sections. The ten questions are highly quantitative and extremely time pressured. Pretty well nobody finishes them before being timed out.

This is a very brief summary - more detail is available in our PDF Guide .

Other Games - Disease and Disaster Identification

There have been accounts of some test-takers being given a third game as part of their Solve assessment. At time of writing, these third games have always been clearly introduced as non-scored beta tests for Imbellus to try out potential new additions to the assessment. However, the fact that these have been tested means that there is presumably a good chance we’ll see them as scored additions in future.

Notably, these alternative scenarios are generally variations on a fairly consistent theme and tend to share a good deal of the character of the Ecosystem Building game. Usually, candidates will be given a whole slew of information on how an animal population has changed over time. They will then have to wade through that information to figure out either which kind of natural disaster or which disease has been damaging that population - the commonality with the Ecosystem Building game being in the challenge of dealing with large volumes of information and figuring out which small fraction of it is actually relevant.

Join thousands of other candidates cracking cases like pros

How to effectively prep for the solve assessment.

We discuss how to prep for the Solve assessment in full detail in our PDF guide . Here though, we can give you a few initial pointers to get you started. In particular, there are some great ways to simulate different games as well as build up the skills the Solve assessment tests for.

Playing video games is great prep for the legacy Solve assessment in particular, but remains highly relevant to the new Redrock version.

Contrary to what McKinsey and Imbellus have said - and pretty unfortunately for those of us with other hobbies - test-takers have consistently told us that they reckoned the Problem Solving Game and now the Solve assessment pretty robustly favours those with strong video gaming experience.

If you listened when your parents told you video games were a waste of time and really don’t have any experience, then putting in some hours on pretty much anything will be useful. However, the closer the games you play are to the Solve scenarios, the better. We give some great recommendations on specific games and what to look for more generally in our Solve guide - including one free-to-play game that our clients have found hugely useful as prep for the plant defence game!

PST-Style Questions

The inclusion of the Redrock case studies in the new version of Solve really represents a return to something like a modernised PST. Along with the similar new BCG Casey assessment, this seems to be the direction of travel for consulting recruitment in general.

Luckily, this means that you can leverage the wealth of existing PST-style resources to your advantage in preparation.

Our PST article - which links to some free PST questions and our full PST prep resources - is a great place to start. However, better than old-fashioned PDF question sets are the digital PST-style questions embedded in our Case Academy course . Conducted online with a strict timer running, these are a much closer approximation of the Solve assessment itself. These questions are indeed a subset of our Case Academy course, but are also available separately in our Course Exercises package .

Quick Mathematics With a Calculator

Again, specifically for the Redrock assessment, you will be expected to solve math problems very quickly. The conceptual level of mathematics required is not particularly high, but you need to know what you are doing and get through it fast using a calculator (and/or Excel, if you are already comfortable with that program).

Our article on consulting math is a great place to start to understand what is expected of you throughout the recruiting process, with our consulting math package (a subset of our Case Academy course) providing more in-depth lessons and practice material.

Learn to Solve Case Studies

With the Redrock Case Study clearly being an ecology-themed analogue to a standard business case study, it's pretty obvious that getting good at case studies will be useful.

However, the Solve assessment as a whole is developed and calibrated to be predictive of case interview performance, so you can expect that improving your case solving ability will indirectly bring up your performance across the board.

Of course, this overlaps with your prep for McKinsey's case interviews. For more on how to get started there, see the final section of this article.

Learning About Optimal Strategies for the Games

The first thing to do is to familiarise yourself with the common game scenarios from the Solve assessment and how you can best approach them to help boost your chances of success.

Now, one thing to understand is that, since the parameters for the games change for each test-taker, there might not be a single definitive optimal strategy for every single possible iteration of a particular game. As such, you shouldn’t rely on just memorising one approach and hoping it matches up to what you get on test day.

Instead, it is far better to understand why a strategy is sensible in some circumstances and when it might be different to do something else instead if the version of the game you personally receive necessitates a different approach.

In this article, we have given you a useful overview of the games currently included in the Solve assessment. However, a full discussion with suggested strategies is provided in our comprehensive Solve guide .

With the limited space available here, this is only a very brief sketch of a subset of the ways you can prep.

As noted, what will help with all of these and more is reading the very extensive prep guidance in our full PDF guide to the Solve assessment...

MCC Solve Assessment PDF Guide

Preparing for the Solve assessment doesn’t have to be a matter of stumbling around on your own. Whilst prep isn’t quite as straightforward as it would be for a more conventional test, there is still a lot you can do to increase your chances.

This article is a good start to get you up to speed. From here, though our new, updated PDF guide to the McKinsey Solve assessment is your first stop to optimise your Solve preparation.

This guide is based on our own survey work and interviews with real test-takers, as well as follow-ups on how the advice in the previous guide worked out in reality.

The MyConsultingCoach Solve guide is designed to be no-nonsense and straight to the point. It tells you what you need to know up front and - for those of you who have already received the invitation to interview and don’t have much time - crucial sections are clearly marked to read first, with specific advice for prepping in a hurry

For those of you starting early with more time to spare, there is also a fully detailed, more nuanced discussion of what the test is looking for and how you can design a more long-term prep to build up the skills you need - and how this can fit into your wider case interview prep.

All throughout, there is no fluff to bulk out the page count. The market is awash with guides at huge page counts, with appendices etc stuffed full of irrelevant material to boost overall document length. By contrast, we realise your time is better spent actually preparing than ploughing through a novel.

If this sounds right for you, you can purchase our PDF Solve guide here:

The Next Step - Case Interviews

So, you pour in the hours to generate an amazing resume and cover letter.

You prepare diligently for the Solve assessment. You go through our PDF guide , implementing all the suggestions. Accordingly, you pour more hours into gaming, skill building and practising with PST-style questions.

You feel great on the day itself and ace the test, building a perfect ecosystem and keeping your plant alive for 50+ turns or acing the calculations for the Redrock questions.

Your product and process scores are right at the top of your cohort and those plus your resume and cover letter are enough to convince McKinsey to invite you for a first-round case interview. Excellent!

Now the real work begins…

Arduous as application writing and Solve prep might have seemed, preparing for McKinsey case interviews will easily be an order of magnitude more difficult.

McKinsey tells candidates not to prepare for Solve, and it is quite possible that someone might pass that assessment without having done any work in advance. However, McKinsey explicitly expects candidates to have rigorously prepared for case interviews , and it is vanishingly unlikely that an unprepared interviewee could pass even first-round interviews.

The volume of specific business knowledge and case-solving principles, as well as the sheer complexity of the cases you will be given, mean that there is no way around knuckling down, learning what you need to know and practising on repeat.

McKinsey have internal mentoring programmes for promising individuals and we have even heard of HR staff there explicitly telling candidates to secure private coaching before their interviews (indeed, it seems MCC got directly recommended by at least one HR).

All this means that, if you want to get through your interviews and actually land that McKinsey offer, you are going to need to take things seriously, put in the time and learn how to properly solve case studies.

Unfortunately, not all case cracking methods are created equal. There are some older-but-still-well-known systems out there largely trading on brand recognition, but with dubious efficacy - especially in a world where interviewers know all about the frameworks they teach and how to select cases that don’t fit them.

The method we teach throws out generic frameworks altogether and shows you how to solve cases the way a real management consultant approaches a real engagement. Usefully, our method is based specifically on the way McKinsey train incoming consultants

The time you put into learning our approach to case cracking won't just be time down the drain memorising some cribs to be forgotten after the interview. Instead, the methods we teach should still be useful when you start the job itself, giving you a head start on becoming a top-performing consultant!

You can start reading about the MCC method for case cracking here . To step your learning up a notch, you can move on to our Case Academy course .

To put things into practice in some mock interviews with real McKinsey consultants, take a look at our coaching packages .

And, if all this (rightfully) seems pretty daunting and you’d like to have an experienced consultant guide you through your whole prep from start to finish, you can apply for our comprehensive mentoring programme here .

Looking for an all-inclusive, peace of mind program?

Candidates who sign up to our free services are 3 times more likely to land a job in one of their target firms . How?

• We teach how to solve cases like consultants , not through frameworks
• Our Meeting Board lets you practice with peers on 100+ realistic, interactive cases.
• Our AI mentor creates a personalised study roadmap to give you direction.
• All the advice you need on resume, cover letter and networking.

We believe in fostering talent, that’s why all of the above is free .

Account not confirmed

Client goal

Our client is Beautify. Beautify has approached McKinsey for help with exploring new ways to approach its customers.

Situation description

Beautify is a global prestige cosmetics company that sells its products mainly inside high-end department stores such as Harrods and Shanghai No. 1. It also has a presence online with specialty retailers like Sephora. Beautify produces a number of makeup, fragrance, and skin care products sold under several different brands.

In department stores, beauty consultants play a critical role with consumers:

• approaching “passive” customers
• demonstrating their knowledge of the products
• actively selling the products
• maintaining a loyal customer base of repeat buyers

These consultants are hired directly by Beautify or through specialist, third-party agencies that find new recruits for a fee. Beautify is then responsible for selecting, training, and paying the consultants. Within Beautify, beauty consultants are managed independently by each brand in each country. For example, this may mean a consultant might be part of the Chanel team in a store. However, consumers are shifting more to online shopping, and too many beauty consultants are left working in empty department stores.

McKinsey study

Beautify’s president and COO engaged McKinsey to help evaluate if training the majority of beauty consultants to use virtual channels to connect with customers could be profitable for the company.

Helpful hints

• Write down important information.
• Feel free to ask the interviewer to explain anything that is not clear to you.

Question 1:

Beautify is excited to support its current staff of beauty consultants on the journey to becoming virtual social media-beauty advisors. Consultants would still lead the way in terms of direct consumer engagement and would be expected to maintain and grow a group of clients. They would sell products through their own pages on beautify.com, make appearances at major retail outlets, and be active on all social media platforms.

What possible factors should Beautify consider when shifting this group of employees toward a new set of responsibilities?

• Take time to organize your thoughts before answering. This will help show your interviewer that you have a logical approach and can think in an organized way, regardless of the accuracy of the outcome.
• Develop an overall approach before diving into details.

Reveal Answer

Question 2:.

One of the key areas that Beautify wants to understand is the reaction of current and potential new customers to the virtual social media-beauty advisors.

Imagine you are a current Beautify customer and you mostly shop at your local department store because you enjoy the high-touch service offered by in-store consultants. What features would make you consider switching to a mostly virtual sales experience?

Helpful hint

Consider the issues raised in the question and group your thoughts around them. This will ensure you are giving the most relevant answers.

Question 3:

The discussion about virtual advisors has been energizing, but you’d like to ground the discussion in some analysis. You’ve always found it helpful to frame an investment in terms of how long it will take to turn profitable, such as when incremental revenues are greater than the cost of the project.

You sit down with your teammates from Beautify finance and come up with the following assumptions.

• With advisors, you expect ten percent overall increase in incremental revenue—the team assumes that Beautify will gain new customers who enjoy the experience as well as increased online sales through those engaged, but it will also lose some to other brands that still provide more in-store service. The team assumes this will happen in the first year.
• In that first year, Beautify will invest €50 million in IT, €25 million in training, €50 million in remodeling department store counters, and €25 million in inventory.
• All-in yearly costs associated with a shift to advisors are expected to be €10 million and will start during the first year.
• Beautify’s revenues are €1.3 billion.

How many years would it take until the investment in advisors turns profitable?

• Don’t feel rushed into performing calculations. Take your time.
• Remember that calculators are not allowed - you may want to write out your calculations on paper during the interview.
• Talk your interviewer through your steps so that you can demonstrate an organized approach; the more you talk, the easier it will be for your interviewer to help you.