how to prepare for case study books

Hacking the Case Interview

It can be challenging to determine which resources are the best to use to prepare for your McKinsey case interview . There are a countless number of case interview articles, videos, prep books, courses, and coaching services.

So, which resources teach case interviews the quickest, most efficient way? Which resources teach the best McKinsey case interview strategies and techniques? What are the best free resources available?

If you have an upcoming McKinsey case interview, we have you covered. In this article, we’ll cover the best resources to prepare for your McKinsey case interview given your needs and budget.

We categorize these McKinsey case interview prep resources into the following categories:

• Free resources to prepare for your McKinsey case interview
• McKinsey case interview prep books
• McKinsey case interview courses
• McKinsey case interview coaching

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.

Free Resources to Prepare for Your McKinsey Case Interview

Case Interview Videos

If you are completely new to McKinsey case interviews, you can watch our 80-minute complete guide to case interviews. This is the perfect introductory video for beginners because you’ll get an overview on:

• What is a case interview
• The eight parts of a case interview
• The six common types of cases
• Written case interviews and group case interviews
• 25 of the best case interview tips

Make sure to check out our YouTube channel and subscribe for free case interview lessons, tips, and practice cases.

McKinsey’s Website

You should also check out McKinsey’s interview preparation website because they provide four practice cases that you can work on without having to rely on a case partner.

The four cases are:

Diconsa case : Non-profit case focused on deciding whether to leverage a chain of convenience stores to deliver basic financial services to inhabitants of rural Mexico. You can watch a video walkthrough of how to solve the case below.

GlobaPharm case : Acquisition case focused on deciding whether a large pharmaceutical company should acquire a smaller startup. You can watch a video walkthrough of how to solve the case below.

Electro-light case : New product launch case focused on deciding whether a beverage company should launch a new sports drink.

National Education case : Non-profit case focused on helping an Eastern European country’s Department of Education improve their school system.

MBA Consulting Casebooks

Consulting casebooks are documents that MBA consulting clubs put together to help their members prepare for consulting case interviews. Consulting casebooks provide some case interview strategies and tips, but they mostly contain case interview practice cases.

You can download 23 MBA consulting casebooks with over 700+ free practice cases in our MBA casebook compilation .

Many of these cases come from previous McKinsey interviews, so they can be a great resource to get McKinsey case interview practice. We’ve included a few of our recommended consulting casebooks below:  

• Wharton (2017)
• Darden (2019)
• Kellogg (2012)
• Fuqua (2018)
• Sloan (2015)

You should know that a major caveat of using these consulting casebooks is that the quality of cases varies significantly. Some practice cases may not be representative of what an actual case interview is like. Other cases may provide poor explanations of the sample answers.

McKinsey Case Interview Prep Books

In the next section of this article, we’ll move onto the best paid resources to use to prepare for your McKinsey case interview. We’ll start by covering the best 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 personalized, one-on-one case interview 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.

Final Thoughts on Preparing for McKinsey Case Interviews

We hope that you’ve found this article helpful in narrowing down which resources to use to prepare for your McKinsey case interviews.

Whether you choose to exclusively use free resources or purchase case interview prep books, courses, or coaching, we want to offer you these five critical McKinsey case interview preparation tips. Lastly, make sure that you perfect your McKinsey resume to ensure that you even get an interview.

1. Learn the right strategies the first time

It is very important to learn the right case interview strategies the first time. If you learn poor case interview strategies and then practice solving cases using these strategies, you’ll develop bad case interview habits. These habits will be difficult to correct later on when you decide to switch to using more effective case interview strategies.

If you learn the effective and robust strategies in the beginning, you’ll save yourself many hours of preparation time.

2. Practice with high-quality practice cases

When practicing cases, try to use the highest quality practice cases you can find. Ideally, these cases will come directly from McKinsey and be representative of an actual case interview in terms of difficulty and length.

You’ll find yourself improving much more quickly if you use high-quality practice cases versus low-quality cases.

3. Practice with a case partner whenever possible

While it may be helpful to practice solving cases by yourself in the beginning, you should practice with a case partner when you feel comfortable solving cases. Practicing with a case partner is the best way to simulate a real case interview.

4. Keep a list of improvement areas

Don’t just work through practice cases and stop once you have answered all of the questions. Take the time to go through exactly what you did to solve the case and identify areas you could have done better. Keep a list of everything you could have improved on after each case.

After doing a few practice cases, you’ll likely notice patterns on things that you consistently don’t do well. This is a great way to identify your weaknesses so that you can work on improving them.

5. Work on improving one thing at a time

Finally, focus on improving one thing at a time. Trying to work on all of your improvement areas at once is difficult to do and will likely be unproductive. Before each practice case interview, pick one thing that you want to work on. When you have mastered that one thing, move onto the next improvement area.  

Land Your Dream Consulting Job

Here are the resources we recommend to land a McKinsey consulting offer:

For help landing consulting interviews

• Resume Review & Editing : Transform your resume into one that will get you multiple consulting interviews

For help passing case interviews

• 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.
• Case Interview Coaching : Personalized, one-on-one coaching with a former Bain interviewer.
• 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.

For help passing consulting behavioral & fit interviews

• 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.

Land Multiple Consulting Offers

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

47 case interview examples (from 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)
• Profitability case with ex-McKinsey manager (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 with notes (by IGotAnOffer)
• BCG mock case interview with ex-BCG associate director - Public sector case (by IGotAnOffer)
• BCG mock case interview: Revenue problem case (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)
• Digital transformation case with ex-Bain consultant
• Bain case mock interview with ex-Bain manager (below)

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)

12. EY Parthenon case interview examples

• Candidate-led case example with feedback (by IGotAnOffer)

14. 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)

5. How to practise case interviews

We've coached more than 15,000 people for interviews since 2018. There are essentially three activities you can do to practice case interviews. Here’s what we've learned about each of them.

5.1 Practise by yourself

Learning by yourself is an essential first step. We recommend you make full use of the free prep resources on our consulting blog and also watch some mock case interviews on our YouTube channel . That way you can see what an excellent answer looks like.

Once you’re in command of the subject matter, you’ll want to practice answering cases. But by yourself, you can’t simulate thinking on your feet or the pressure of performing in front of a stranger. Plus, there are no unexpected follow-up questions and no feedback.

That’s why many candidates try to practice with friends or peers.

5.2 Practise with peers

If you have friends or peers who can do mock interviews with you, that's an option worth trying. It’s free, but be warned, you may come up against the following problems:

• It’s hard to know if the feedback you get is accurate
• They’re unlikely to have insider knowledge of interviews at your target company
• On peer platforms, people often waste your time by not showing up

For those reasons, many candidates skip peer mock interviews and go straight to mock interviews with an expert. 

5.3 Practise with experienced MBB interviewers

In our experience, practising real interviews with experts who can give you company-specific feedback makes a huge difference.

Find a consulting interview coach so you can:

• Test yourself under real interview conditions
• Get accurate feedback from a real expert
• Build your confidence
• Get company-specific insights
• Learn how to tell the right stories, better.
• Save time by focusing your preparation

Landing a job at a top consulting company often results in a $50,000 per year or more increase in total compensation. In our experience, three or four coaching sessions worth ~$500 will make a significant difference in your ability to land the job. That’s an ROI of 100x!

Click here to book case interview coaching with experienced MBB interviewers.

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