Learn the case interview basics, practice with 200+ cases, and benefit from extensive test materials, and interactive self-study tools.
Topic Overview
Topic Overview
Getting Started
Learn how to prepare for your case interview in a structured and efficient way, and maximize your chances of success.
Preparation Plan
Self Study
Practice With Peers
Practice with Coaches
Learn all about the different types of cases in consulting interviews and how to be well-prepared for every challenge.
Market Sizing
Market Entry
Brainteaser
Growth Strategy
M&A Cases
Pricing
Competitive Response
Valuation Cases
Profitability Cases
Structuring
Understand why a clear structure is crucial in case interviews and how it helps you solve complex cases efficiently.
Approaching a Case
How to Build a Good Structure
How to Communicate Your Structure
How to Practice Structure
Math in Case Interviews
Learn about the most common mathematical requirements in case interviews and how to handle them confidently and efficiently.
Why Math Matters
Fast Math
How to Practice Math Skills
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The Case Interview Format

When applying to top consulting firms, one of the most crucial stages of the interview process is the case interview. This format is designed to assess your analytical competencies, problem-solving skills, and ability to think strategically under pressure. Let's take a look at what to expect.  
 

 

Structure of a Case Interview

A case interview is a 30-minute simulation of a typical business project that consultants may have worked on. Cases provide a real example of an on-the-job experience and the assumption is that if a candidate is successfully able to tackle a case interview, he or she is also more likely to be a successful management consultant.

Case studies are the most important and usually the longest part of consulting interviews. In addition to the case study, the interview typically includes introductory small talk, a personal fit interview, and closing questions (see the illustration below).

The graph shows the process of a case-interview, based on 4 steps.

Many companies review and standardize their consulting cases prior to a real interview to ensure that the case is neither too difficult nor too easy. Companies also ensure that a variety of skills are tested during the interviews.

 

The Typical Flow of a Case Interview

The case interview typically follows a structured flow to ensure that both the interviewer and the candidate cover all necessary aspects of the business problem. It involves the following phases:

1. Case Presentation and Problem Understanding

To start off, the interviewer will present a specific business problem or scenario. This could range from market entry considerations, to profitability issues, or organizational changes. The problem is usually based on real-world business issues that the consulting firm dealt with in the past.

You are expected to listen carefully, take notes, and clarify any points that are not clear to fully understand the scope and context of the problem.

👉 To get a better feeling for possible case prompts, check out the following beginner cases. 

Case by
PrepLounge
DHL Consulting case: Bike Shop
4.4
89.5k times solved
Difficulty: Beginner
Interviewer-led
Growth strategy
Profitability analysis
You have been hired to support the owner of a bike-shop as a business consultant. The bike-shop has suffered a sign(...)
You have been hired to support the owner of a bike-shop as a business consultant. The bike-shop has suffered a significant revenue decline during(...)
Expert case by
FastFood Chain Turnaround
5.0
900+ times solved
Difficulty: Beginner
Candidate-led
Profitability analysis
Our client (FastFood Co) is a fast-food company that has > 20 restaurants in the city. Recently, the business has enc(...)
Our client (FastFood Co) is a fast-food company that has > 20 restaurants in the city. Recently, the business has encountered significant challenge(...)
Company case by
Oliver Wyman
Oliver Wyman Case: Setting up a Wine Cellar
4.1
116.8k times solved
Difficulty: Beginner
Candidate-led
Profitability analysis
I’m thinking about setting up a wine cellar in my basement. The way I see it, shelf space would be divided into two sect(...)
I’m thinking about setting up a wine cellar in my basement. The way I see it, shelf space would be divided into two sections: (1) a “drinking” section(...)

2. Framework Development

Afterwards, you outline a structured approach or framework to tackle the problem. Common frameworks include the SWOT analysis, Porter’s Five Forces, or the 4P's, with which you can structure your information. This step demonstrates your ability to break down complex issues into manageable parts.

However, keep in mind that it is not enough to simply memorize the standard framework concepts. While standard frameworks are useful for a rudimentary outline of a case problem, they need to be optimized and adapted to the individual case. Don't worry, as this is a skill you can develop, but it definitely requires thorough preparation and practice

Once you have crafted your structure, clearly explain your framework to the interviewer, ensuring he or she understands your thought process and logical flow.

3. Analysis and Problem Solving

Next, you dive into the analysis. During the interview, your interviewer may provide additional data, charts or exhibits. Analyze this information to support your framework and build your argument. Formulate hypotheses based on your analysis and test them against the data provided. If needed, adjust your approach based on your new findings.

During the quantitative analysis, perform the necessary calculations to support your findings. This could include market sizing estimations, profitability calculations or a cost analysis. Good mental math skills will definitely help in this phase. 

4. Recommendations

Once you have worked through your structure, provide clear, and actionable recommendations based on your analysis. Use the Pyramid Principle of communication, highlight your key findings and explain how they address the problem.

You should also be ready to justify your suggestions with evidence from your analysis (i. e. data) and discuss possible next steps or further areas of investigation that the client may wish to consider.

After all, the interviewer may question your conclusions or ask for further clarification. Be prepared to defend your recommendations and discuss alternative perspectives. 

After, all the best way to prepare for your interview is practice. Explore our Case Library with real examples now!

Company case by
Bain & Company
Bain Case: BeautyCo – Where Did the Profits Go?
4.6
51.4k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Profitability analysis
Our client BeautyCo is a large European perfumery company with 500 shops across Europe. However, BeautyCo has been strug(...)
Our client BeautyCo is a large European perfumery company with 500 shops across Europe. However, BeautyCo has been struggling with a decrease in profi(...)
Case by
PrepLounge
Increasing net worth of Johnny Depp
4.3
2.6k times solved
Difficulty: Intermediate
Interviewer-led
Brain teaser
Market analysis
New product
Johnny Depp, now 56 years old, has started to feel that his acting career is about to get over. His net worth cross(...)
Johnny Depp, now 56 years old, has started to feel that his acting career is about to get over. His net worth crossed over $650 million at t(...)
Company case by
Oliver Wyman
Oliver Wyman Case: Full Electrons Ahead
4.4
134.2k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Market sizing
Operations strategy
Your client, large automotive OEM WyCar, has developed its first fully electric vehicle (EV) and introduced it as a pilo(...)
Your client, large automotive OEM WyCar, has developed its first fully electric vehicle (EV) and introduced it as a pilot on the Austrian market last(...)
Company case by
FTI-Andersch AG
FTI-Andersch AG Case: Business Transformation – Global Plastics AG
5.0
300+ times solved
Difficulty: Intermediate
Interviewer-led
Growth strategy
Market analysis
Operations strategy
Die Global Plastics AG ist ein im M-DAX gelistetes Unternehmen mit weltweit 2.500 Mitarbeitenden und einer Gesamtleistun(...)
Die Global Plastics AG ist ein im M-DAX gelistetes Unternehmen mit weltweit 2.500 Mitarbeitenden und einer Gesamtleistung in Höhe von € 395,0 Mio. in(...)
Case by
PrepLounge
Make Steakhouse Great Again!
4.4
7.8k times solved
Difficulty: Advanced
Candidate-led
Capacity change
Growth strategy
Operations strategy
Your client is a Franchisee of a popular Steakhouse-chain in Germany. The Franchisee currently owns 2 Steakhouse-restaur(...)
Your client is a Franchisee of a popular Steakhouse-chain in Germany. The Franchisee currently owns 2 Steakhouse-restaurants and wants you to investig(...)
Company case by
FTI-Andersch AG
FTI-Andersch AG Case: Turnaround – Global Plastics AG
5.0
600+ times solved
Difficulty: Beginner
Candidate-led
Restructuring
Sie wurden vom Vorstand der Global Plastics AG beauftragt, die wirtschaftliche Performance der Unternehmens-Gruppe im Ra(...)
Sie wurden vom Vorstand der Global Plastics AG beauftragt, die wirtschaftliche Performance der Unternehmens-Gruppe im Rahmen eines Independent Busines(...)
Case by
PrepLounge
Deep Water Rescue
3.2
2.2k times solved
Difficulty: Advanced
Candidate-led
Market analysis
Profitability analysis
Deep water is a European manufacturer of small yachts and premium boats for private customers. The company operates in E(...)
Deep water is a European manufacturer of small yachts and premium boats for private customers. The company operates in Europe and the Middle East and(...)
Case by
PrepLounge
Smart Meters
4.4
35.1k times solved
Difficulty: Intermediate
Interviewer-led
Market analysis
Market entry
New product
Operations strategy
Profitability analysis
The municipal utility Hamburg Energized is a local energy retail (power and gas) and distribution grid company active in(...)
The municipal utility Hamburg Energized is a local energy retail (power and gas) and distribution grid company active in the city of Hamburg. The majo(...)
Expert case by
Chemical Merger Synergies
4.8
600+ times solved
Difficulty: Intermediate
Candidate-led
Mergers & Acquisition
Two global chemical companies announced their intent to merge. Senior management of the two companies called your firm t(...)
Two global chemical companies announced their intent to merge. Senior management of the two companies called your firm the day after the merger was an(...)
Case by
PrepLounge
Bodybuilding Made Easy
4.0
11.3k times solved
Difficulty: Advanced
Candidate-led
Market analysis
Market entry
Market sizing
New product
Operations strategy
Your client is a newly founded protein company. Its owners are two brothers. One of them is a chemist and the other one(...)
Your client is a newly founded protein company. Its owners are two brothers. One of them is a chemist and the other one is a very famous fitness model(...)
Case by
PrepLounge
Overseas Market Growth - 1st Round BCG Type
4.6
8.2k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Operations strategy
The client is an Indonesian producer of paper boards which can be further processed into paper boxes, shopping bags, etc(...)
The client is an Indonesian producer of paper boards which can be further processed into paper boxes, shopping bags, etc. They sell in both their dome(...)
Expert case by
Paper Product Overseas Growth
4.0
400+ times solved
Difficulty: Advanced
Candidate-led
Growth strategy
Operations strategy
The client is an Indonesian producer of paper boards which can be further processed into paper boxes, shopping bags, etc(...)
The client is an Indonesian producer of paper boards which can be further processed into paper boxes, shopping bags, etc. They sell in both their dome(...)
Expert case by
FastFood Chain Turnaround
5.0
900+ times solved
Difficulty: Beginner
Candidate-led
Profitability analysis
Our client (FastFood Co) is a fast-food company that has > 20 restaurants in the city. Recently, the business has enc(...)
Our client (FastFood Co) is a fast-food company that has > 20 restaurants in the city. Recently, the business has encountered significant challenge(...)
Case by
PrepLounge
Sticky USB-Sticks
4.6
8.4k times solved
Difficulty: Intermediate
Interviewer-led
Competitive response
Growth strategy
Operations strategy
Profitability analysis
Du berätst den USB-Stick Produzenten "Sticky". Das bisher profitable USB-Stick Geschäft wird dieses Jahr zum e(...)
Du berätst den USB-Stick Produzenten "Sticky". Das bisher profitable USB-Stick Geschäft wird dieses Jahr zum ersten Mal rote Zahlen schreibe(...)
Expert case by
BCG Round 1 Case: Telecommunication Troubles
5.0
800+ times solved
Difficulty: Intermediate
Candidate-led
Profitability analysis
Your client, Convo Telco, is a leading national telecommunications player in a developing country. They offer both mobil(...)
Your client, Convo Telco, is a leading national telecommunications player in a developing country. They offer both mobile and fixed (e.g. broadband, i(...)
Case by
PrepLounge
The Madhouse Animation Crisis
4.2
6.7k times solved
Difficulty: Advanced
Candidate-led
Competitive response
New product
Profitability analysis
Your client is Madhouse Studios, one of the largest anime producers in Japan. The anime-industry is flourishing. Origina(...)
Your client is Madhouse Studios, one of the largest anime producers in Japan. The anime-industry is flourishing. Originally revenue was generated main(...)
Case by
PrepLounge
Baby Clothing Market Entry
4.1
4.5k times solved
Difficulty: Intermediate
Interviewer-led
Market entry
Profitability analysis
Our client is a consumer packaged goods company looking for top-line growth opportunities. They are considering extendin(...)
Our client is a consumer packaged goods company looking for top-line growth opportunities. They are considering extending its pre-existing baby produc(...)
Expert case by
Pets Medicine Profit Improvement
0.0
300+ times solved
Difficulty: Beginner
Candidate-led
Profitability analysis
Your client is a global drug company producing and selling medicine (pills, powder, ointments, injections, etc.) for a v(...)
Your client is a global drug company producing and selling medicine (pills, powder, ointments, injections, etc.) for a variety of pets (dogs, cats, bi(...)
Case by
PrepLounge
Music Streaming - Market Sizing
4.4
9.1k times solved
Difficulty: Beginner
Interviewer-led
Brain teaser
Market sizing
Profitability analysis
Your friend is an aspiring artist and is asking for your consulting advise on a problem that he has been struggling with(...)
Your friend is an aspiring artist and is asking for your consulting advise on a problem that he has been struggling with. Your friend (the artist) is(...)

Key Takeaways for Your Case Interview Success

Mastering the case interview is a crucial step in securing a consulting job. To perform well, you need to demonstrate structured thinking, analytical skills, and clear communication while solving a real-world business problem.

The interview typically follows a structured flow, starting with an introduction and resume discussion, followed by the case presentation, where you clarify the problem and outline a logical framework. From there, you analyze data, test hypotheses, and apply quantitative skills to arrive at well-supported recommendations. Finally, you summarize your findings and engage in a discussion to defend your approach.

Success in case interviews comes down to practice. Familiarizing yourself with common frameworks is useful, but true preparation involves adapting them to different cases, improving your problem-solving speed, and refining your communication. By structuring your thoughts clearly, staying flexible in your approach, and confidently presenting your findings, you’ll increase your chances of impressing your interviewer and landing an offer at a top consulting firm. 🚀

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