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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. 

Company case by
DHL Consulting
DHL Consulting case: Bike Shop
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 the last year, and now the owner would like you to assess the situation and options for the way forward.They want to know last year’s profit, i.e. how it was affected by the revenue decline, and what the priority actions are to survive the next year. (short term)In addition they would like to understand the strategic competitive position of the shop better and how to increase revenues again mid- to long-term.
91.2k times solved
Difficulty: Beginner
Interviewer-led
Growth strategy
Profitability analysis
Expert case by
Emily
FastFood Chain Turnaround
Our client (FastFood Co) is a fast-food company that has > 20 restaurants in the city. Recently, the business has encountered significant challenges, with net profit drops to negative.The client wants us to help them turn around the business. How would you help them?
1.4k times solved
Difficulty: Beginner
Candidate-led
Profitability analysis

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!

tkMC Case: Market entry strategy in the lithium materials trade market
Your client tk Commodity Trade (tk ComT) is a global materials trader - they buy and sell raw materials. tk ComT had stable EBITDA margins in recent years. They consider expanding their target market and entering the Lithium (electric vehicle battery grade) trade, due to the current high demand for electric cars and Lithium-ion batteries. The client is concerned about minimizing the cash spending and about improving the payback period for this market-entry campaign, due to corporate cash policy.As a consultant, you are expected to calculate the size of the Lithium market and to assess the payback periods for an organic market entry (with own resources) as well as for the acquisition of an established company. Finally, the client expects a proposal about the best market entry strategy and potential opportunities and risks.
21.4k times solved
Difficulty: Intermediate
Interviewer-led
Market entry
New product
Profitability analysis
Company case by
Bain & Company
Bain Case: Old Winery
You have inherited the “Old Winery” from your grandfather, a winery that has been family-owned for five generations and can be dated back to the 16th century.Half of the eleven hectares are used to grow white grapes, the other half to grow red grapes. They are grown in a conventional way, i.e. they are not organically farmed and certified. The vine stocks are in a good condition regarding age and care. Overall, the only ¼ of the harvest is made into wine by the winery itself; the rest is sold.Your grandfather never wanted to change the image of the winery and left the managerial and administrative task to a young and energetic wine-maker. Due to the not so well-known brand, the demand for the “Old Winery” wine is currently rather low.You do not intent to run the winery operatively, given your limited knowledge of winemaking, but find the idea of owning a winery exciting.
142.9k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Market sizing
Mergers & Acquisition
Case by
PrepLounge
Rally racing
Your client is the owner of UBS #42, a rally racing team. There are 36 races in a season. At the end of the season, the driver who has earned the most number of points will win the championship.Jeff Tarin, a well-known driver, races for UBS #42. He began racing in this tournament six years ago and is currently ranked fifth in a field of 40 drivers.The director of marketing at Jazz Sweets recently contacted your client to ask whether your client would like to start a second racing team that Jazz Sweets could sponsor. The director realizes that rally racing is the fastest-growing race sport segment among males aged 18-45. He has already asked a successful driver from a regional conventional racing circuit to be the new team’s first driver. Your client wants to know whether he should go ahead with this opportunity.
9.4k times solved
Difficulty: Beginner
Candidate-led
Market entry
Profitability analysis
Expert case by
Benjamin
Revolut Mock Interview: Strategy & Operations
You are part of the Strategy & Operations team at Revolut.Revolut has had significant growth over the past couple of years, with customer base growing 20-30% per year. Our apps have also been highly rated in the various app stores - be it GooglePlay or on the Apple store.Revolut's current customer strategy is to segment customers based on their subscription tiers/plans. Standard: FreePlus: $3.99/mthPremium: $7.99/mthMetal: $14.99/mthUltra: Ultra $55/mthKey differentiation between the plans are in the pricing and features. Namely, the more expensive tiers like Metal and Ultra have additional features such as personalized and premium card design, free access to lifestyle apps (e.g. Financial Times, Class Pass etc), better FX rates and priority customer support.It's great that Revolut has been expanding rapidly, but we are starting to see some stresses on our existing operations and processes. One key area of concern is in customer service, our satisfaction scores have started to trend down and call center headcounts and costs have been increasing in recent years, but we are struggling to handle the load of incoming requests and tickets.You have been tasked to lead a project to solve this problem without ballooning costs. 
400+ times solved
Difficulty: Advanced
Interviewer-led
Operations strategy
Expert case by
Benjamin
BCG Beginner Case: Fashion startup
Your client is a D2C (direct to customer) online fashion business in a developing country. It is a new brand, launched about 2 years ago and founded by ex-investment bankers. Their brand focuses on trendy, edgy design that is less main-stream (versus big brands like H&M, Uniqlo, Zara etc) for adult men. While they have been growing fast, they want to understand how they can further improve their sales.
300+ times solved
Difficulty: Beginner
Interviewer-led
Growth strategy
Case by
PrepLounge
Advanced Accounting Interview Questions for Finance
This question set sharpens your understanding of advanced accounting topics essential for finance roles. It covers areas like stock-based compensation, deferred taxes, goodwill impairment, and working capital.Plan for 35–45 minutes to complete the set. Use the model answers to check your reasoning and improve how clearly you explain complex accounting concepts.
300+ times solved
Difficulty: Advanced
Interviewer-led
Audit
Case by
PrepLounge
Bus maintenance
Your client, BusCo, is a passenger bus company in Uganda, Africa. Due to the poor road conditions, maintenance plays a very important role in the reliability and quality of BusCo’s services.BusCo outsourced all of its bus maintenance operations to MaintainCo in the last years. However, especially last year, BusCo was very disappointed with the maintenance provided. The bad service caused delays in service as well as trip cancellations.Now BusCo is considering doing its maintenance in-house. However, an investment amortization period of 4 years or less is required.The CEO wants to know from you if they should pursue the in-house maintenance strategy next year?
18.1k times solved
Difficulty: Beginner
Candidate-led
Operations strategy
Profitability analysis
Case by
PrepLounge
Daily Journal
Our client, Daily Journal is a highly respected & upscale newspaper which is read widely in the UK. The paper is positioned between the Wall Street Journal and the New York Times. Recently, the newspaper added an online segment which is a spin-off from the motherfirm. Dailyjournal.com is currently just an online version of the newspaper, but work is underway to structure the online version into a consumer-appealing website. Their main goal is to earn revenue from the website and that's where you come in. The client wants to know how to generate revenue from the website?
15.5k times solved
Difficulty: Intermediate
Interviewer-led
Growth strategy
Market sizing
Company case by
DHL Consulting
DHL Consulting Case: Local Commerce
DHL aims to create a new E-Commerce business model that combines:A DHL-owned online marketplace.Participation limited to local retailers.Same-day parcel delivery services by DHL.The strategic goal is to strengthen the stationary retail sector as an important customer group. The DHL Consulting team is tasked by the DHL Business Unit "Post & Parcel Germany" (P&P) with identifying a suitable German city for a pilot project and estimating the potential revenue in that city.
6.9k times solved
Difficulty: Beginner
Interviewer-led
Market entry
Market sizing
Expert case by
Benjamin
MBB Unconventional Case: Coral Reefs
Your client is the Government of Indonesia, specifically a joint committee formed between a few key ministries including the Ministry of Marine Affairs & Fisheries, Ministry of Tourism and Ministry of Environment & Forestry. Indonesia is one of the largest developing countries in the world, with a population of about 285M people and an average monthly income of only USD 500. Located in Southeast Asia, Indonesia is actually a vast archipelago comprised of 17,000 islands, giving it one of the longest and most complex coastlines in the world. It is also part of the Coral Triangle, an area demarcated by scientists as the global epicenter of marine diversity. Your client tells you that Indonesia's once pristine coral reefs have seen a rapid decline over the past decade. They have come to you for help and want to figure out what is causing the problem.
300+ times solved
Difficulty: Advanced
Candidate-led
Non-conventional
Public sector
Case by
PrepLounge
Universal TV
Our client is a Canadian TV company, Universal TV. They recently entered the US market in the northeast to expand its market share and capture a large part of the 4 m consumers in a market that has little competition. However, in the past few years, Universal TV has been unable to realize a profit.You are hired to figure out why this is the case and what their next move should be.
7.4k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Profitability analysis
Expert case by
Cristian
Hara Coffee Co's innovative coffee subscription model
Our client, Hara Coffee Company, is a large coffee chain with over 200 locations in the United Kingdom. They import beans from numerous regions and batch-roast them in the UK, offering customers a vast selection of premium blends. In addition to serving delicious coffee, our client offers freshly made sandwiches, pastries, and salads of the highest quality. Hara Coffee Co. is also one of the most socially and environmentally responsible coffee brands in the United Kingdom, and their value proposition heavily relies on customers paying a premium for delicious products that do not compromise on sustainability metrics.The rising cost of living has significantly reduced the revenue of coffee chains throughout the United Kingdom over the past year. People are increasingly choosing to brew their own coffee at home, with beans delivered by subscription. The CEO of Hara Coffee Company is intrigued by the expansion of coffee subscription models in the UK. They requested that our team investigate whether their chain could also introduce a coffee subscription model, in which customers pay a fixed monthly fee and receive a certain number of coffees throughout the month.
1.6k times solved
Difficulty: Intermediate
Interviewer-led
Competitive response
Growth strategy
Market entry
New product
Profitability analysis
Sustainability
Case by
PrepLounge
Incos Pens
Incos is a global manufacturer of writing products with divisions in North America, Europe and South-East Asia. Their global sales are $60 m and their profits amounted to around $30 m. Their European division who manufactures and sells disposable pens is experiencing flattening sales and a decreasing profit. The client hired you to help him come up with suggestions to get profits back on track.
41.6k times solved
Difficulty: Advanced
Interviewer-led
Market entry
Market sizing
Profitability analysis
tkMC Case: Portfolio optimization of a holding company
Your client is a holding company that has three larger companies in its portfolio. The successful portfolio has developed very dynamically over the last two years and the companies are facing different challenges. The management takes this situation as an opportunity and wants to carry out a portfolio optimization. As a consultant, you are first asked to carry out a portfolio analysis and then to prepare recommendations for action for the portfolio decisions.
12.6k times solved
Difficulty: Intermediate
Interviewer-led
Growth strategy
Mergers & Acquisition
Case by
PrepLounge
Restructuring & Distressed M&A Interview Questions for Finance
This set explores the fundamentals of restructuring and distressed M&A, focusing on valuation, capital structure, financing tools, and practical deal dynamics. It introduces the key differences between healthy-company M&A and distress situations, where speed, liquidity, and creditor negotiations often drive outcomes.Working through the set should take around 30-35 minutes, making it suitable for interviews in investment banking (restructuring groups), private equity (special situations, distressed investing), or credit advisory.
200+ times solved
Difficulty: Beginner
Interviewer-led
Mergers & Acquisition
Restructuring
Case by
PrepLounge
Essen für die Schüler?
Ein Restaurantinhaber überlegt sich, Schulen mit Essen zu beliefern. Für seine Überlegungen würde er gerne wissen, wie viel Geld er verdienen würde, wenn er 1% der Schulkantinen-Mittagessen in Deutschland verkauft?
5.9k times solved
Difficulty: Intermediate
Candidate-led
Market sizing
Profitability analysis
Case by
PrepLounge
Love thy neighbour as thyself
Your client, Port-Pouri, is a discount retailer in Portugal having 130 stores spread throughout the country and thereby being the largest player in the market. It is more profitable and has a higher market share than the closest competitor (75 stores). This competitor has recently been bought by SPARnien, the largest discount retailer in Spain, who plans to convert all 75 stores into SPARnests, the infamous stores that made the company so successful in its home turf. The CEO of Port-Pouri is worried and asks for your advice. Should she react, and if so, how?
3.5k times solved
Difficulty: Intermediate
Candidate-led
Competitive response
Market analysis
RSM Ebner Stolz Case: Noch zu retten?
Sie werden vom Management der mittelständischen Packaging-Group gebeten, eine Einschätzung zur wirtschaftlichen Lage des Konzerns abzugeben. Im Rahmen der Analyse der operativen Ergebnisse der Auslandswerke soll das Werk identifiziert werden, bei dem der aktuell größte Handlungsbedarf besteht. Davon ausgehend sollen Optionen erarbeitet und bewertet werden, die der Kandidat dem Management im Umgang mit diesem Auslandswerk empfehlen würde und was ggf. auf Basis der Analyse für Rückschlüsse hinsichtlich der Konzernzahlen gezogen werden können.
12.1k times solved
Difficulty: Intermediate
Interviewer-led
Operations strategy
Profitability analysis
Case by
PrepLounge
Europe Rail Tunnel
The airlines covering the Cologne to London route are facing a competitive threat from a new rail tunnel connecting Britain and Germany by train. Which all factors do you think the airlines should consider before reacting to this threat?
5.3k times solved
Difficulty: Beginner
Candidate-led
Competitive response
Market analysis

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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