47 case interview examples (from McKinsey, BCG, Bain, etc.)

Case interview examples - McKinsey, BCG, Bain, etc.

One of the best ways to prepare for   case interviews  at firms like McKinsey, BCG, or Bain, is by studying case interview examples. 

There are a lot of free sample cases out there, but it's really hard to know where to start. So in this article, we have listed all the best free case examples available, in one place.

The below list of resources includes interactive case interview samples provided by consulting firms, video case interview demonstrations, case books, and materials developed by the team here at IGotAnOffer. Let's continue to the list.

  • McKinsey examples
  • BCG examples
  • Bain examples
  • Deloitte examples
  • Other firms' examples
  • Case books from consulting clubs
  • Case interview preparation

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

1. mckinsey case interview examples.

  • Beautify case interview (McKinsey website)
  • Diconsa case interview (McKinsey website)
  • Electro-light case interview (McKinsey website)
  • GlobaPharm case interview (McKinsey website)
  • National Education case interview (McKinsey website)
  • Talbot Trucks case interview (McKinsey website)
  • Shops Corporation case interview (McKinsey website)
  • Conservation Forever case interview (McKinsey website)
  • McKinsey case interview guide (by IGotAnOffer)
  • McKinsey live case interview extract (by IGotAnOffer) - See below

2. BCG case interview examples

  • Foods Inc and GenCo case samples  (BCG website)
  • Chateau Boomerang written case interview  (BCG website)
  • BCG case interview guide (by IGotAnOffer)
  • Written cases guide (by IGotAnOffer)
  • BCG live case interview extract (by IGotAnOffer) - See below

3. Bain case interview examples

  • CoffeeCo practice case (Bain website)
  • FashionCo practice case (Bain website)
  • Associate Consultant mock interview video (Bain website)
  • Consultant mock interview video (Bain website)
  • Written case interview tips (Bain website)
  • Bain case interview guide   (by IGotAnOffer)
  • Bain live case interview extract (by IGotAnOffer) - See above

4. Deloitte case interview examples

  • Engagement Strategy practice case (Deloitte website)
  • Recreation Unlimited practice case (Deloitte website)
  • Strategic Vision practice case (Deloitte website)
  • Retail Strategy practice case  (Deloitte website)
  • Finance Strategy practice case  (Deloitte website)
  • Talent Management practice case (Deloitte website)
  • Enterprise Resource Management practice case (Deloitte website)
  • Footloose written case  (by Deloitte)
  • Deloitte case interview guide (by IGotAnOffer)

5. Accenture case interview examples

  • Case interview workbook (by Accenture)
  • Accenture case interview guide (by IGotAnOffer)

6. OC&C case interview examples

  • Leisure Club case example (by OC&C)
  • Imported Spirits case example (by OC&C)

7. Oliver Wyman case interview examples

  • Wumbleworld case sample (Oliver Wyman website)
  • Aqualine case sample (Oliver Wyman website)
  • Oliver Wyman case interview guide (by IGotAnOffer)

8. A.T. Kearney case interview examples

  • Promotion planning case question (A.T. Kearney website)
  • Consulting case book and examples (by A.T. Kearney)
  • AT Kearney case interview guide (by IGotAnOffer)

9. Strategy& / PWC case interview examples

  • Presentation overview with sample questions (by Strategy& / PWC)
  • Strategy& / PWC case interview guide (by IGotAnOffer)

10. L.E.K. Consulting case interview examples

  • Case interview example video walkthrough   (L.E.K. website)
  • Market sizing case example video walkthrough  (L.E.K. website)

11. Roland Berger case interview examples

  • Transit oriented development case webinar part 1  (Roland Berger website)
  • Transit oriented development case webinar part 2   (Roland Berger website)
  • 3D printed hip implants case webinar part 1   (Roland Berger website)
  • 3D printed hip implants case webinar part 2   (Roland Berger website)
  • Roland Berger case interview guide   (by IGotAnOffer)

12. Capital One case interview examples

  • Case interview example video walkthrough  (Capital One website)
  • Capital One case interview guide (by IGotAnOffer)

13. Consulting clubs case interview examples

  • Berkeley case book (2006)
  • Columbia case book (2006)
  • Darden case book (2012)
  • Darden case book (2018)
  • Duke case book (2010)
  • Duke case book (2014)
  • ESADE case book (2011)
  • Goizueta case book (2006)
  • Illinois case book (2015)
  • LBS case book (2006)
  • MIT case book (2001)
  • Notre Dame case book (2017)
  • Ross case book (2010)
  • Wharton case book (2010)

Practice with experts

Using case interview examples is a key part of your interview preparation, but it isn’t enough.

At some point you’ll want to practise with friends or family who can give some useful feedback. 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 case interviews 1-on-1 with ex-interviewers from MBB firms . Start scheduling sessions today!

The IGotAnOffer team

Interview coach and candidate conduct a video call

Client goal

The Bill & Melinda Gates Foundation is a private organization with vast ambitions; one of its goals is to reduce extreme poverty worldwide. The foundation has asked McKinsey to design a basic financial-services offering for residents in remote communities in Mexico.

Situation description

The majority of Mexico’s rural population is relatively poor, relying in part on government benefits for their livelihood. Since they tend not to have bank accounts, they usually collect those benefits in cash from a limited number of state-owned bank branches. These branches are often a long way from where the recipients live, so it can take a lot of time and effort to collect benefits. In addition, while traveling to the branches, people can be at risk of falling victim to crime.

The Mexican government also owns and operates a chain of 22,000 stores throughout Mexico, called Diconsa, which provide basic food, clothes, and other essential goods to rural populations. These stores are supplied through a network of central and regional warehouses and several thousand delivery trucks.

McKinsey study

McKinsey has been asked to investigate and assess the possibility of using the Diconsa network to provide a set of basic financial services to supplement the limited number of state-owned bank branches. This would start with dispensing benefit payments and would gradually grow to include savings accounts, bill payments, insurance, loans, and other financial products.

Helpful hints

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

Practice Case Questions

Question 1:.

What should the team investigate to determine whether the Diconsa network could and should be leveraged to provide a range of basic financial services to Mexico’s rural population?

  • 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:.

The team has estimated that it currently costs a family 50 pesos per month in transportation and food to make the journey to collect benefit payments. The team also estimates that if benefits were available for collection at local Diconsa stores, the cost would be reduced by 30 percent.

Twenty percent of Mexico’s population is rural, and of that number, half currently receive state benefits.

You can assume that Mexico has a population of 100 million.

You can also assume that families in Mexico have an average four members, and that this does not vary by region.

If every family could collect state benefits at their local Diconsa stores, how much in total per year would be saved across all Mexican rural families receiving state benefits?

  • 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.

Question 3:

The team conducted a survey on a sample of the rural population in three different regions of Mexico. Participants were shown several statements about the concept of collecting benefits at their nearest Diconsa store and asked how much they agreed with each statement. The average response to some of the questions in each region is shown below:

What are your observations regarding this information, and how would you explain these trends?

  • Take some time to look at the information and note down any observations you have.
  • Challenge yourself to identify trends that are not immediately obvious from the data.

Question 4:

In a subsequent meeting, representatives from the state-owned bank express concern about how challenging it will be to offer basic financial products to the rural population.

One of the representatives mentions that these are regions where people have minimal education and are unfamiliar with banking products. There is also significant crime and fraud. He asks for the team’s thoughts about how the bank could sell these services effectively to the population given these challenges.

Helpful hint

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

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McKinsey & Company Harvard Case Solution & Analysis

Home >> Harvard Case Study Analysis Solutions >> McKinsey & Company


The rubric of the case illustrates a myth of providing the management consulting services to the related clients and other new emerging businesses. Under the particular scenario, McKinsey and Company was one of the successful management consulting firms, which provided vast services and solutions to its prospective clients and other new enterprises to growth within a particular industry. On the other hand, a complex and undetermined culture of the company had attracted many new partners to become part of the company’s future success. The uniqueness of the served clienteles was necessary for the business success because it was the main operational activity of the firm which utilized billings and profits then distributed to the related partners and other connected consultants who made important decisions and provides enormous services to the prospective clients. Also, another important factor for the success of the business was that McKinsey was granting authority and ownership to each of the consultants to operate their area and to perform best results in exchange for the compensation and other benefits fixed by the planning committee and managing partners.With all these important considerations, it has been analyzed that retaining a partner was the important decision for the company.It means that if the turnover would be high, then it can be said that a particular decrease in the profit margins would incur because the clients would be reduced upon expelled partner (Performed as aconsultant).

McKinsey & Company Harvard Case Solution & Analysis

Therefore, it is concluded that McKinsey was exceptionally lucky in 1956 because of its ability to increase the firm’s partners for increasing the profit margins more than the expected one. Moreover, being a decentralized structure of the enterprise, partners and other authoritative persons feltfree to take decisions individually to expand the size of the business regarding more profits. Thus, with all these concerns, it is assessedthat McKinsey was under the multiplelevels of structure and internal operations subjected to increase the risks and threats from other players in the particular industry. From the client’s perspective, theprimary objective is to allow them to earn profits by consider being an individual business rather than distribute the share with the partner. It means that the client would only focus on the earnings rather than provide benefit to the other from the current share. This concept is somehow suitable to attract the customers and consultants to increase the billings and shared profits for the firm’s managing partners. The detailed history of McKinsey also provides fluctuations in the performance of the management because of the turnover of the policies and procedures in against of the economic downturn or upward. So, with all these considerations, it can evaluate the future of the business based on the fixed terms and policies applied by McKinsey overtime.

Problem Statement

After the critical evaluation of the firm, a tweak impact of the overall performance determined several challenges in the stage to provide services with the specialist consultancy. The first issue was the inability of McKinsey & Company to increase the staff overtime because of the high cost and expense turnover, which was distributing to the principle, partners, and individual consultants.......................

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What does McKinsey look for?

As with other MBB firms, McKinsey looks for the three core skills and qualifications in potential employees: problem-solving skills , leadership ability and achieving mentality . Prior business background is highly advantageous although not a requirement, and technical/industry knowledge is required for certain career tracks – such as McKinsey Digital, or jobs at support centers.

Since the terms are quite ambiguous, I’ll explain them here:

  • Problem-solving skills: I’m talking about the analytical aspect of problem-solving – the whole consulting industry exists on the basis that consultants can break down business problems better than anyone else.
  • Leadership ability: Getting a bunch of experienced people to do something they don’t want to is never easy; additionally, consultants usually work in teams. Keep in mind, “leadership” is about influencing people, not about getting nominated as the class monitor.
  • Achieving mentality: The problems are always big and difficult, while deadlines are tight; don’t even think about work-life balance here, you have to go all-out. People unwilling to work that hard are never kicked out of the industry, because they never get in!
  • Business intuition: Business background isn’t a requirement for prospective consultants ; however, business knowledge is essential to excellent performance in case interviews. Luckily, it’s something you can learn, and most concepts used in consulting interviews are on basic to intermediate levels.
  • Technical skills: Technical skills are indeed required for specialist positions, such as at McKinsey Digital. Precisely what kind of expertise or technical knowledge is tested will be informed to you by McKinsey, so don’t worry too much.

In McKinsey case interviews, each candidate must successfully display the following five attributes – among which the first three are crucial to consulting . In the Case Interview End-to-End Secrets Program , I’ll teach you how to demonstrate all of these attributes effectively, both in the case interview and the PEI.

McKinsey case interview format

What is a case interview.

A case interview is an interview with a business context.

In a case interview, you are given a business problem and asked to solve it – that problem, together with the whole surrounding business context, is called a case.

“The Pirate Company, based in the Caribbeans, offering assets removal services to ships in the area, is suffering from negative profits. They want you to look into the cause and solve it.”

In this case, the problem is decreasing profits. If you are the candidate, you’re supposed to find out what’s causing it, and most of the time, also how to fix it.

What are McKinsey case interviews like?

McKinsey case interviews are often interviewer-led. At the most extreme of this format, the interviewer “leads” the problem-solving process by asking separate questions related to the case context. The candidate cannot decide how to approach the problem. In actual cases, however, the candidate may be given some autonomy depending on the interviewer.

There are two extremes in terms of the autonomy you’d have in a case interview. On one end of the spectrum, in a  candidate-led case , you lead the problem-solving process. On the other end, in an interviewer-led case, the interviewer tells you what to do.

mckinsey & company case study

If the Pirate case above were candidate-led, you’d actively break down the big profit problem and look for the root cause.

This time, however, it’s an interviewer-led case, so you’ll instead answer a series of questions coming from the interviewer.

  • Interviewer-led cases consist of multiple mini-cases

In an interviewer-led case interview, the case is split into multiple small questions. Treat these questions as mini-cases, and take a structured approach to these questions, just like with a larger case. Avoid bottom-up answers as much as possible – “top-down” is still the name of the game.

Engagement Managers often decide on somewhat-structured question lists in advance, while Partners – being more senior – are more likely to make up questions on the fly.

  • What factors would you consider in assessing The Pirate Company’s decreasing profits?
  • The Company’s ship and crew costs have been rising due to competition with the British Royal Navy. What solutions do you suggest?
  • How much additional revenue is necessary for The Pirate Company to break-even, in the face of the rising costs?
  • Interviewer-led cases are more rigid

Expect to feel disconnected navigating through a predetermined set of questions.

Even if you come up with a fully-working approach, be prepared to be “dragged” back to the line if it differs from what the interviewer has in mind.

In answering the first question, you divided the costs into daily operations costs and battle costs, reasoning that battles don’t occur everyday, and their costs vary a lot. 

While this may be a valid segmentation of pirate costs, the interviewer will likely redirect you to the predetermined course and have you work on ship and crew costs.

  • Interviewer-led cases place more emphasis on being right

mckinsey & company case study

You must nail every question if you want to pass interviewer-led cases.

This difference is because in interviewer-led cases, the problem has been broken down for you through the predetermined set of questions (so you have more brainpower to focus on getting the “correct” answers). This stands in contrast to candidate-led cases where you break down the problem by yourself.

Nonetheless, never jump straight to the answer in interviewer-led cases – they still look for an “analytical mindset”, so the right result without a structured, logical approach will amount to nothing.Interested in learning about the candidate-led side of the spectrum? Wanting to know about the mechanisms of case interviews at BCG and Bain? See this extensive guide on candidate-led case interviews at BCG and Bain!

McKinsey case interview questions

McKinsey case interviews can be methodically prepared for by arranging the possible questions into the following 8 predictable categories .

  • Framework/issue tree questions
  • Market-sizing and guesstimate questions
  • Brain teasers
  • Chart insight questions
  • Value proposition questions
  • Information questions
  • Math problems
  • Solution-finding questions

I have written a detailed guide on these question types – you may want to check out that article for more insights. For each type of question, there is one example – suggestions and answers are at the end of this section, but try to answer them on your own first !

These questions apply not only to McKinsey cases, but also other interviewer-led case interviews !

Type 1 – Framework / issue tree

The issue tree is at the heart of consulting problem-solving, you cannot avoid it.

These questions are often worded as follows: “What factors would you consider in tackling this problem”, or “What are the possible factors leading to this problem?”. Don’t be tricked by listing out the factors immediately – they are in fact expecting an issue tree.

And to draw a spot-on issue tree, you need to master consulting problem-solving fundamentals , the MECE principle , and common consulting frameworks . Solid business intuition is also highly beneficial for these questions.

Gastronomia – a gourmet restaurant chain has found the turnover rate among its highly-skilled chefs increasing dramatically for the last 3 years; this has led to a noticeable decline in food quality and increased training costs, among other negative effects.

Which factors would you consider when tackling this turnover problem?

Type 2 – Market-sizing & guesstimate

These are on top of the list among popular interviewer-led case questions!

Market-sizing and guesstimate questions ask you to estimate vague (sometimes even silly) numbers such as the number of pickup trucks in the US, or how many ping pong balls you can fit into a Boeing 747.

What’s being tested here is whether you approach the question in a structured manner; the ideal way to tackle these questions is to divide the figure into small pieces, estimate each piece, then combine for a final result.

The interviewer doesn’t usually have a number in mind, so the margin of error can be quite large.

This question type is so common, we devote a whole article to it. Check out our comprehensive guide on Market-Sizing & Guesstimate Questions for more details!

E.g.: How many smartphones are sold each year, globally?

Type 3 – Brain teasers

Most people think solving brain teasers relies on “innate intelligence”, but in fact, even these questions can be trained!

Some brain teasers ask you to explain impossible situations or perform impossible tasks – the key here is to doubt your initial assumptions and challenge common sense.

Others focus on your ability to notice subtle details, so beware that your first impression is almost always inadequate – keep diving and switching angles for unobvious patterns, or pay close attention to every word.

Still others test your logical thinking with complex riddles; for these questions, visualizing the given information on scratch paper significantly eases up the process.

Read our article about Case Interview Brain Teasers for more insights on all of these exciting brain teasers!

Type 4 – Chart insights

Charts are powerful data visualization tools. Consultants love them, so if you’re a prospective consultant, mastering charts is a must – that’s why in my Case Interview End-to-End Secrets Program Case Interview End-to-End Secrets Program , the Math package includes an extensive section dedicated to chart exercises!

You can find a more detailed guide in the Charts section in our article about Consulting Math . I’ll keep it short here: the key to nailing chart questions is to examine all the labels before diving in, and when looking for insights, consider (1) the chart’s purpose, (2) your objectives, and (3) trends and abnormalities in the data.

Type 5 – Value proposition

mckinsey & company case study

No business can succeed without understanding what their customers want, so no candidate gets a consulting offer without fully mastering these questions!

“What will our customers like?” Business intuition is required to deliver a good answer. Again, as with the Solution-Finding questions, you should structure your analysis and presentation (for instance, “High Priority”, “Medium Priority”, and “Low Priority”).

E.g.: What will a customer consider when buying a Toyota sedan?

Type 6 – Information questions

In any problem-solving process, information is one of the overarching concerns!

You do need some business and consulting knowledge to answer these questions to know where to fetch a given piece of data from, and how to do it (e.g.: survey, financial reports, client interview, etc.).

Is there any other tip to improve your performance ? Well, do your interviewer a favor, say in advance how you can acquire necessary data, and say it in a structured manner .

E.g.: How do you assess your target customer’s preferences for sports cars?

Type 7 – Math problems

A lot of information in case interviews and consulting work comes in the quantitative form, so you won’t escape Math by joining the consulting industry!

When you have to do math, perform back-of-the-envelope calculations in a structured fashion, and say out loud what you’re writing. For one thing, it’s safe; for another, you show that you’re careful, organized, and reliable – just like actual consultants.

We have a dedicated article on Consulting Math , which you should definitely read.

Type 8 – Solution-finding

What’s the point of analyzing a problem, if not to solve it?!

These questions rely mostly on your business intuition, however, some tips can still be applied: (1) segment the solutions based on their characteristics, and (2) give at least two solutions, preferably three to five.

E.g.: A restaurant that relies solely on on-premise dining found the loss of adjacent parking space (due to termination of contract) harming their revenue. How can they fix that?

Are 8 question types enough?

Well yes, but actually no. If you study those eight question types , rest assured that you’ve covered the majority of questions in interviewer-led cases.

However, I haven’t touched the most advanced questions – combinations or variants of the basic types, or even completely unpredictable ones.

How do you tackle these harder questions?

  • Master the Basics: If you’re still a beginner, don’t bother about the advanced exercises. Focus your efforts on the basics, once you’ve mastered them it’d be comfortable to move on to higher, more sophisticated levels.
  • Business Intuition: You need business intuition for a business-related job, it’s simple as that. Nearly every case concerns business in one way or another – even public sector cases. This is why we also teach business intuition in our Case Interview E2E Secret Program .

McKinsey case interview tips

In an interviewer-led case, there is (1) less of a natural flow, (2) more emphasis on correctness, and (3) less time to develop an answer. How do you adapt to these challenges?

These are the seven tips I used to crack case interviews at McKinsey. In the Case Interview End-to-End Secrets Program , you can find countless such tips throughout the 10 case videos of the Tips and Techniques package.

Tip #1: Actively try to take control of the case

In the beginning, try to control the case as if it’s candidate-led .

Playback the case, clarify and break down the problem immediately at the start – most likely, the interviewer will stop you if he/she intends on the interviewer-led route. However, by that time, you’ve already scored some points.

I can give you three benefits for acting as such:

  • The interviewer will acknowledge your leading and proactive personality – these characteristics are very important for a consultant-to-be .
  • If the interviewer slips towards the candidate-led sides (yes, McKinsey cases can be candidate-led to a degree), you will not appear lazy and passive.
  • You might actually exert influence on the case flow and drive it towards your preferred direction.

mckinsey & company case study

Tip #2: Ask for data as much as possible

Ask for data from the interviewer as much as you can !

The more abundant and relevant your information is, the more effective you can solve problems. It’s better to ask a little too much and deliver a good answer than to ask nothing and ruin your chances.

However, in an interviewer-led case, you’re supposed to deliver your answers in one pitch and otherwise limit interactions with the interviewer. Then, how do you convince the interviewer to give you data?

Every request you make must be purposeful , i.e. it serves the problem-solving efforts; and you have to make those purposes absolutely clear . Say these lines before you ask:

  • When you receive the question, say that you need to “clarify a few key points”, so that you can be “on the same page” with the interviewer.
  • If the need for additional information arises, say that you need some “background information”, in order to grasp the overall context and “deliver the best answer”.

If successful, the interviewer may even give you some leeway to be unstructured, which is very convenient for brainstorming!

Tip #3: Use insights from previous questions to answer the next

Always keep in mind the insights from previous questions.

I’ve seen quite a few candidates diverting so much attention to one question, they forget the insights from others – why waste such a useful data source?

Although questions in an interviewer-led case may feel disconnected, they are often still inter-related in some ways, belonging to the same “case universe”. That means you can use insights from the previous questions to answer the current one.

Additionally, this technique shows you are capable of seeing the big picture while working on the details. That’s an essential ability in consulting work , the interviewer will no doubt be pleased if you can demonstrate it.

mckinsey & company case study

Tip #4: Analyze as deep and comprehensive as possible

Try as hard as you can to be in-depth and comprehensive with your analyses.

For your answers to NOT be generic and lackluster, you must go wide and go deep with your analyses in the first place; so always ask yourself “Am I overlooking something?” and “Can I drill down further?”.

Suppose you’re tasked to evaluate the customer preferences for ASUS gaming laptops – one bad way to answer that question is to list these factors: “low price, high performance, good design” – this answer generalizes all of ASUS’s customers while leaving out a crucial aspect – customer service.

For the ASUS example, a better way to respond is to first segment the customers based on their budget (Entry-level, Mid-range, High-end), then evaluate price, performance, design and customer service for each segment. The resulting answer will be much more specific, all-round and actionable.

Be careful not to spend too much time drilling and expanding though – if you take too long, the interviewer will force you to the next question and you lose one chance to prove yourself.

Tip #5: Always follow up answers with takeaways

End your answers with takeaways, even if they’re not asked for.

To a management consultant , everything must serve a purpose – “So what?” is the question that follows any piece of data.

You demonstrate that consulting mentality in a case interview by following up each and every answer with that so-what – if ASUS entry-level customers like low price and decent performance for their gaming laptops, how can the company use that to their advantage? Spot-on takeaways also demonstrate excellent business intuition.

However, if you trip up and make bad conclusions, it will hurt your chances. Don’t go spewing out anything that comes across your mind for the sake of “So what?”.

Tip #6: Deliver concise and insightful answer pitch

Present your answer in one perfect, insightful, top-down, concise, captivating final pitch .

As I said just earlier, in an interviewer-led case, delivering answers in one pitch is important. However, I’ve seen candidates taking this too far and ended up hurting their own analysis by not asking for necessary information – this is a pitfall you should look out for.

Anyhow, content-wise, the pitch must be short, but still containing all the important points from your analysis. The contents must also be arranged in a structured fashion , or you’ll look unorganized in the interviewer’s eyes.

When making the pitch, use all available means of communication – speech, body language, even pen-and-paper to visualize the contents. Maintain eye contact, speak concretely and confidently, avoid fidgeting, or raising the tone at the end (suggesting that you’re unsure).

mckinsey & company case study

Tip #7: Make a personal script

Script what you intend to say in the interview, and practice a hundred times.

You have to sound professional in a case interview, the words you speak must be structured and formal. How do you do that without feeling forced and awkward? How to avoid making presentation mistakes? How do you maintain charisma in that situation?

Unless you’re a witch (in which case, use magic to charm the interviewer), I recommend practicing all the formulaic lines, such as the opening or data requests, using an interview script. With enough training, those lines will feel natural to you.

Additionally, using scripts also saves brainpower, which you’ll definitely need a lot in case interviews. Think about when you learn to drive a car – once the shift stick, the brake and the gas pedal become so natural to you they feel like parts of your body, you can focus your whole brain on the road!

How to prepare for McKinsey case interview

Step 1: familiarize with interviewer-led case examples.

I encourage you to go out there and find as many examples of interviewer-led cases as possible, to grasp how such cases “flow”. There are four such examples on the McKinsey website with suggested answers.

  • Diconsa Case
  • Electro-Light Case
  • GlobaPharm Case
  • National Education Case

Here at MConsultingPrep, we also have a few interviewer-led case examples in our Case Interview E2E Secret Program Case Interview E2E Secret Program , complete with detailed feedback on every aspect from content to presentation, all in video format.

Step 2: Practice consulting math

Like it or not, you must practice math – especially mental math. Case interviews and the consulting world are riddled with calculations.

In the beginning, consulting math can be difficult for some; nonetheless, I have a few tips for you to ease the process and still practice effectively: 

  • Use Your Head: Do all your daily calculations mentally unless an EXACT answer is required.
  • Flatten the Learning Curve: At the start, a piece of scratch paper and a 5% margin of error really help; once you are confident, discard the paper and narrow down the margin.
  • Establish a Routine: Allocate some time for daily practice this may seem hard at first, but once you’ve overcome the inertia, you can literally feel the improvement.

Step 3: Develop business intuition

Business intuition forms from your knowledge and experience of the field, and they are crucial for case interview success. You can improve your business intuition in two ways:

  • Written Sources: I suggest reading business papers daily; you can also visit McKinsey , Bain and BCG websites for their excellent articles. Beware though – it’s not the pages you read that count, but the insights you draw from them.
  • First-hand Experience and Observations: Don’t just come to your workplace to work; try to examine what senior managers are doing – what’s the rationale for their decision, and how has it impacted the organization?

Step 4: Learn the case interview question types

The key to conquering interviewer-led cases is in methodically mastering each and every basic question type; then you will be ready to tackle the more complex and less predictable ones.

For each type, there are always tips and techniques to deliver an ideal answer; you can refer to the previous section, or check out an even more comprehensive guide in our Case Interview Questions .

The key takeaway is to treat interviewer-led questions like mini-cases, and take a structured, MECE approach to each.

Step 5: Perform mock interviews

The best way to train on something is to do it.

Well, you CAN’T simply come to McKinsey and ask them for a case interview, but you CAN find a partner to conduct mock interviews for you. It’s better if you can find a former consultant to do it – they’ve been through countless case interviews, both mock and real.

Fortunately, MConsultingPrep’s coaching service helps you practice mock interviews with highly experienced coaches. Our coaches have tremendous consulting experiences in Mckinsey, who can draw you a comprehensive preparation plan for McKinsey case interviews. Let’s find out who your personal coach is!

Make the best of every mock interview you do by recording them, then replay again, and again, and again. You’ll realize a lot of mistakes you made, and how you can fix them.

McKinsey PEI – How to prepare

Back when I first joined McKinsey, fit interviews played a much smaller role in the consulting recruitment process. Some consultants even regarded them as “just procedure”. Now the game has changed – even though case interviews are still the key to an offer, you must also excel in PEIs, to show that you’re a good fit.

What do they ask in the McKinsey PEI?

PEI stands for Personal Experience Interview , which as you may have guessed, is about “that one time in your life” when you did something extraordinary.

In the 10-minute PEI, the interviewer will ask you to tell one story, then drill down to extract insights about your soft skills and personal traits.

  • Tell me about a time when you overcame a significant challenge
  • Tell me about a time when you convinced people to change their viewpoints
  • Tell me about a time when you resolved an important disagreement with your teammates
  • Tell me about a time when you lead your team through extraordinary hardship
  • Tell me about a time when you successfully handled conflict within your team

Besides these stories, the interview might also ask you the “Why consulting/Why McKinsey?” questions. You don’t need a story for these, just give them a valid and authentic reason; do research, understand the industry, the company, and how they fit with your own values and capabilities – that’s how you get the best answers for these questions.

How to prepare for the McKinsey PEI?

Preparing on a question-answer basis means drafting 10-12 stories, 2-3 for each question type; for all that effort, you might still run into trouble if you’re asked 3-4 times for the same kind of story. Many of us don’t have THAT many stories to tell anyway.

Is it possible to use less effort to deliver even more impressive stories? Here’s my advice: Focus on the stories, not the questions My take on the PEIs is to prepare three to five stories, and make them as detailed, all-round, well-presented as possible. View them from every possible angle, each corresponding to a trait required by McKinsey , or to one of your personal values.

With such an approach, you also gain flexibility – with well-developed stories, you can respond to ANY kind of questions, even the unexpected ones, and you’ll have more stories per question type (3-5).

How can you prepare such stories? Spend your efforts on three layers of a story – the content base, the plot, and the style.

1. Lay Down the Content Base Compare your past experiences with consulting traits (leadership, achieving, problem-solving skills) as well as personal values you’re most proud of, and select the stories best reflecting those traits and values. List down as many details of your stories as possible, make sure they follow this structure: Problem, Actions, Result, Lesson.

2. Form the Story Plot  Trim the unnecessary details, simplify the technical parts to help the listeners understand, then rearrange and dramatize the rest to make your accomplishments really stand out. Add the consulting spirit into the mix by emphasizing the relevant traits, telling your stories in a structured way, explaining all your actions, etc.

3. Refine Your Style Your style of story-telling should be entertaining for both you and your audience. Take time to practice and find your style – and remember, it should be natural, otherwise you won’t be able to use it in a high-stress, high-stake interview. Keep in mind that your style should be formal, because it’s a job interview we’re talking about. Don’t do your trademark sarcasms there, it’s not a stand-up comedy session.

Four common mistakes in the McKinsey PEI

  • Faking stories: This is the biggest one. Fake stories have no depth and many plot holes, once the interviewer drills down you’ll be dead; so please, be as authentic as possible – you should add some spices to your stories, but don’t pour a truckload of salt and pepper into it.
  • Wasting time on context: Move quickly to the results. Time is short, so is the interviewer’s attention span; you should use just enough context to build tension and make your actions and results stand out.
  • Repeating stories: Vary your stories as much as possible. Giving interviewers one story five times tells them you’re inexperienced and prevents them from seeing the best of you.
  • Not focusing on oneself: The story is not about the team, it’s about YOU within the team. Not attending enough to your own accomplishments will diminish your chance of getting hired.

Want to learn more about interviewer-led cases and other secrets to smash through any case interview? Check out our Case Interview E2E Secret Program – Intuition, math, tips and techniques for consulting case interviews, all in one comprehensive package!

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Case interview is the last round of Bain hiring process with 3 stages: application, online tests & interviews. This entire process takes from 4 to 6 weeks

A case interview is where candidates is asked to solve a business problem. They are used by consulting firms to evaluate problem-solving skill & soft skills

Case interview is the last round of BCG hiring process with 3 phases: resume, online tests and interviews. Candidates will have 4-6 interviews in 4-8 weeks.

  • Harvard Business School →
  • Faculty & Research →
  • May 2013 (Revised August 2013)
  • HBS Case Collection

McKinsey & Company

  • Format: Print
  • | Language: English
  • | Pages: 14

About The Author

mckinsey & company case study

Jay W. Lorsch

Related work.

  • Faculty Research

McKinsey & Company

  • McKinsey & Company  By: Jay W. Lorsch and Kathleen Durante

McKinsey Case Interview & PEI - 6 Things You Need to Know

  • Last Updated December, 2023

Rebecca Smith-Allen

Former McKinsey Engagement Manager

If you’re interested in a career in management consulting, McKinsey & Company is probably on your list of firms to apply to. It’s the oldest consulting firm, established in 1926 by James McKinsey, a University of Chicago professor and expert in management accounting.

Today, the firm employs 30 thousand professionals working in 130 cities around the world. McKinsey regularly ranks at the top of lists of strategy consulting firms and is hired by businesses, governments, and non-profit organizations to help solve their toughest problems.

It’s difficult to get a job offer from McKinsey.

Like its top management consulting competitors, Bain and BCG, McKinsey typically hires only 1% of candidates who apply. In particular, McKinsey case interviews are tough to crack…but not impossible.

If you’re interested in trying to beat the odds, this article will tell you what you need to know to succeed. We’ll tell you:

What’s different about McKinsey,

6 things candidates recruiting with McKinsey should know,

We’ll provide a mock McKinsey case interview video, and

Provide tips on acing your McKinsey interview.

Let’s get started!

What’s Different About McKinsey? 6 Things Candidates Should Know

1. consultants are hired for either the generalist track or a specialist track.

Generalists at McKinsey are consultants who could be staffed to help clients in any industry and dealing with any type of business problem. Specialists are consultants with a particular area of expertise.

Areas of specialization within McKinsey  include digital and advanced analytics, marketing and sales, business turn around, operations,  software development and design, and implementation.

2. Consultants Work On-Site At The Client 4 Days A Week.

Most consultants travel a lot and at McKinsey, this is definitely the case. Consider whether regular plane flights and hotel stays are right for you.

3. McKinsey Cases Are Interviewer-Led Rather Than Candidate-Led.

Candidates are still expected to identify key issues to be addressed to solve the business problem presented by their interviewer and outline a plan to explore these issues. After they do that, their McKinsey interviewer is likely to tell the candidate which issue they’d like to discuss first. Other management consulting firms, like Bain and BCG typically let candidates steer their case interview.

4. Interviewers Assess Fit As Part Of Every Interview With Personal Experience Interview (PEI) Questions.

While all strategy firms ask candidates Consulting Behavioral Interview Questions  to assess their fit with their firm, many have one interviewer focus entirely on fit while others focus entirely on a case study question. 

McKinsey interviewers split their interview time between the case and PEI in every interview.

5. McKinsey Looks For Personal Impact And Entrepreneurial Drive In Candidates.

This is in addition to the structured problem solving and leadership skills that McKinsey, as well as other top consulting firms, look for in candidates.

6. Mckinsey Recruiting Uses Solve - a Gamified Digital Assessment.

McKinsey’s Solve Game was launched to broaden the firm’s reach to find the best talent regardless of geography as well as provide deeper insight into candidates’ problem-solving skills.

Keep reading for a deeper dive into these topics.

Generalist versus Specialist Track Roles

When the management consulting industry was first founded, simply having an MBA and expertise in solving business problems was enough to set a consultant apart. Consultants hired by McKinsey could expect to be staffed on a case in any industry and solving any type of problem.

To help clients solve these types of business problems effectively, McKinsey hires people with years of experience in functional specialties. These include advanced analytics, marketing and sales, business turn around, operations, software development and design, and implementation.

Specialists work alongside generalists on projects to leverage their functional expertise across the work of the team. The specialist practices are growing faster than generalist roles and get fewer applications, so if you have the right kind of expertise and apply to the practice, you may have a better chance of landing an interview.

How McKinsey Interviews Differ from Bain and BC

There are two main ways that McKinsey’s interviews differ from those of other top management consulting firms. McKinsey uses interviewer-led case interviews while other firms use candidate-led case interviews.

In the “fit” portion of the interview, McKinsey uses the personal experience interview and each interviewer you meet with in all rounds will assess fit.

Interviewer-led Cases

At the start of any McKinsey case study, candidates need to go through 4 phases to solve the business problem the interviewer has given them in a structured manner: the opening, structure, analysis, and closing. 

In a candidate-led case interview, candidates will pick which part of the problem they want to dive into first and proceed with it. In McKinsey’s interviewer-led cases, the interviewer will pick the first part of the business problem they want the candidate to address.

Is the interviewer-led case interview easier or harder than the candidate-led one?

If you’ve structured the business problem well, breaking the problem down into the MECE  issues that require further analysis, it should not matter who picks which aspect of the problem to address first. What is helpful is knowing what to expect in your case interview so that you don’t start down one path just to be redirected by your McKinsey interviewer.  You don’t want anything to throw you in the middle of your case!

For more information on these 4 phases of answering a case interview question, see  Case Interview Prep .

Behavioral Interview Questions - The McKinsey PEI

As mentioned above, fit or personal experience interview (PEI) questions are part of every McKinsey interview. 

How else is the PEI different?

While other top management consulting firms focus on bringing the best creative problem-solving to their clients’ problems (BCG is notable here), McKinsey is interested in candidates’ personal impact and entrepreneurial spirit.

McKinsey interviewers look for these characteristics in answers to PEI questions. Because of this, it’s good to have some insight into why the firm thinks these characteristics are important.

Personal Impact

McKinsey says this about personal impact on its career website:

McKinsey does not want to create PowerPoint presentations with elegant solutions that sit on an executive’s shelf, not implemented.

Personal impact means that McKinsey consultants work shoulder-to-shoulder, on-site with client executives, developing solutions that don’t just solve a business problem in theory but also do it in practice. This can require facing resistance to change in the client’s organization head-on and persuading people to reassess long-held beliefs.

During the PEI, questions like the following will be asked to assess personal impact:

  •   Tell me about a team you worked on when you needed to change someone’s mind on a topic that was important to them, or
  •   Tell me about a time when you needed to rely on your communication skills to solve a difficult interpersonal situation.

This belief that personal impact is key to developing an implementable solution is what drives McKinsey consultants to spend 4 days a week on client site.

Entrepreneurial Drive

McKinsey says this about entrepreneurial drive on its career website:

McKinsey doesn’t hire consultants who can only implement solutions they’ve seen in previous businesses. They want people who are willing to try new things, take solutions to new industries or new types of problems.

The McKinsey problem solving approach treats each client problem as unique. Each solution should push thinking about best-practices.

In addition to personal impact and entrepreneurial drive, McKinsey also assesses leadership using the PEI. We won’t address this in detail because this is similar to other consulting firms, but you can find more about how McKinsey assesses leadership in our page on  McKinsey PEI Questions.

It also includes What McKinsey Is Looking For and provides a list of 11 Common PEI Questions.

Nail the case & fit interview with strategies from former MBB Interviewers that have helped 89.6% of our clients pass the case interview.

The McKinsey Interview Process - Traditional and Recent Changes

The traditional recruiting process.

For years, McKinsey focused on a group of core schools to find new analyst (undergraduate hires) and associate (MBA hires) candidates. 

While the firm now recruits from a broader set of schools as well as more diverse candidates, recruiting at these core schools still starts in much the same way. McKinsey consultants conduct on-campus presentations and coffee chats to talk to potential candidates about what it’s like to work in the management consulting industry and at McKinsey, in particular.

If the firm hosts an event at your campus, you should attend to make personal connections and to find out first-hand if a career at McKinsey is right for you. If there are no events at your school or if you’re already employed, check out the company’s career site for articles and videos that will tell you what it’s like to work at McKinsey and what it takes to get an offer.

Candidates submit their resumes (and optional cover letters) to the firm’s recruiting department via their school’s department of career services and on the firm website. Candidates who are invited to interview typically have their first round interviews on campus.

During first round interviews, candidates meet with 2 interviewers back-to-back. Candidates who pass first round interviews are invited to a McKinsey office for second round interviews.

In second round interviews, candidates meet with 3 interviewers. Unless a candidate’s interviewers are split in their decision, second round interviews are also final round interviews.

In each round of interviews, McKinsey interviewers walk candidates through a business problem and asks a series of  McKinsey PEI Questions , aimed at evaluating their potential fit with the organization. 

The Recruiting Process for Candidates at Non-core School and Experienced Hires

Candidates from non-core schools submit their resumes (and optional cover letters) directly to the recruiting department of the 3 offices they’d like to work in.

If they are invited to interview, candidates who live relatively close to a McKinsey office will be invited for in-person first round interviews. Others will be asked to do their first round McKinsey interviews via video conference.

Candidates already working in another industry or those working at another consulting firm submit their resumes (and optional cover letters) directly to the recruiting department of the three offices they’d like to work in. They will typically have a phone interview before the “first round” of in-person interviews.

In both cases, once candidates are passed to second round interviews the recruiting process is the same as for core school candidates.

Solve, The McKinsey Problem Solving Game

McKinsey is reaching out to more candidates outside of their traditional core schools to diversify its recruiting. As part of that, it’s launched  Solve , an online game  that assesses candidates’ problem-solving skills.  Solve is both more fun and gives candidates from non-core schools a better shot at getting a McKinsey interview than they’ve had in the past.

Example McKinsey Case Interview - Video

Below, we have 4 videos in which My Consulting Offer founder, Davis Nguyen, walks you  through each segment of a McKinsey case interview from beginning to end. 

Mock McKinsey Case Interview - Opening the Case

The key thing to do in the opening of a McKinsey case study is to repeat back the question so you’re sure you understand the problem you are solving. Then, ask questions to begin to get more information.

Mock McKinsey Case Interview - Structuring the Case

In the structure section of McKinsey Case Interviews, create a MECE list of important issues you will analyze to solve the client’s problem.

Mock McKinsey Case Interview - The Case Analysis

In the analysis section of a McKinsey case study, you’ll need to do analysis to evaluate the best option for your client. This may require interpreting data from charts or graphs provided by your interviewer or doing calculations based on numbers you’re given.

Mock McKinsey Case Interview - Concluding the Case

In the conclusion of McKinsey case interviews, you’ll need to pull your analysis together into a persuasive recommendation for the client. Restate the question you were asked to solve, lay out key findings from each section of your case structure, and show how your analysis points to the course of action the client should take.

Now that you’ve watched our sample McKinsey case interview, you should be ready to start practicing for your own interviews. 

Here are 5 tips on making the most of your preparation time:

5 Tips on Acing Your McKinsey Interview

  • Practice casing with another person. Answering case interview questions does not come naturally and it is not enough to practice on your own since casing requires having a dialogue. Give yourself as much time to practice mock interviews as possible by starting early.
  • Record yourself during mock interviews  using your computer or phone. Study these videos to see how you can improve your performance in each phase of the case interview. Aim to make your answers more fluent and conversational.
  • Practice sample McKinsey interview-led case interviews. Use  McKinsey-specific case interview examples  below to make sure you’re not just familiar with cases, but with McKinsey cases. Make sure you are comfortable with being redirected at times. 
  • Brainstorm several  stories to answer common personal experience interview questions. You can find a list of these common questions here .
  • Find out more about the  McKinsey Solve Game  before you take it. 

After reading this article, you should have a good understanding of what McKinsey’s recruiting process looks like and how McKinsey case interviews are different from other management consulting firms. 

Still have questions?

If you have more questions about McKinsey case interviews, the PEI, or working at McKinsey, leave them in the comments below. One of My Consulting Offer’s case coaches will answer them.

People interested in this topic have also found the following pages helpful:

  • Why McKinsey?
  • McKinsey PEI Questions
  • McKinsey Problem Solving Game
  • Case Interview Examples

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My Consulting Offer has helped almost 89.6% of the people we’ve worked with get a job in management consulting.  

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