Topic Overview
Topic Overview
Back to overview

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.
91.1k 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.
21.1k times solved
Difficulty: Intermediate
Interviewer-led
Market entry
New product
Profitability analysis
Expert case by
Benjamin
McKinsey Unconventional Case: Inclusive Cafes
Your client is a leading retail coffee chain. They are present in several countries globally and are a popular brand in most of the markets that they operate in, with several thousands stores in operation.A key focus of the company currently is diversity & inclusion. In their biggest market which is the US, 1 in 4 people have some sort of disability. One realization the client has had is that their retail stores are not as inclusive to individuals with disabilities. McKinsey has been brought on to help them design more inclusive spaces in their retail stores.
500+ times solved
Difficulty: Intermediate
Interviewer-led
Non-conventional
Case by
PrepLounge
Besser fliegen
Du berätst eine große europäische Fluggesellschaft. Der Vorstandsvorsitzende überlegt, eine neue Sitzklassen-Kategorie, die „Premium Economy“, zwischen der Economy und der First Class einzuführen. Er will von Dir wissen, ob dies eine gute Idee ist.
11.1k times solved
Difficulty: Advanced
Interviewer-led
New product
Operations strategy
Pricing
Profitability analysis
Company case by
FTI-Andersch AG
FTI-Andersch AG Case: Business Transformation – Global Plastics AG
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 2021. Der Umsatz des Unternehmens ging 2020 nach dem Ausbruch der COVID-19-Pandemie stark zurück und soll im Jahr 2022 wieder an das Niveau vor COVID-19 anknüpfen.Neben Umsatzrückgängen hat die Global Plastics AG auch mit einer erhöhten Varianz in den OEM Call-Offs zu kämpfen, was zu Überkapazitäten in der Produktion führt. Zusätzlich befindet sich die Global Plastics AG in Kundenverhandlungen zu bestehenden und neuen Verträgen.Das Thema Nachhaltigkeit ist tief in der Unternehmensidentität verankert. Das Unternehmen investiert kontinuierlich in die Forschung und Entwicklung von neuen Technologien. Diese Investitionen dienen im Wesentlichen dazu ...... das bestehende Produktportfolio weiter zu verbessern und sich einen Wettbewerbsvorteil zu erarbeiten.... den zu erwartenden strengeren Vorschriften hinsichtlich CO2-Neutralität der Wert-schöpfungskette als auch einer steigenden Beimischungsquote von recyceltem Kunststoff und Alternativmaterialien in den nächsten Jahren gerecht zu werden.Das Unternehmen ist bei den Kunden für seine innovativen Technologien bekannt und für seine branchenweit Maßstäbe setzende, präzise und qualitativ hochwertige Fertigung geschätzt. Die Global Plastics AG produziert weltweit in fünf Werken (USA, BRA, HUN, CHN, DEU) Kunststoffbauteile für Fahrzeuginnenräume in den Anwendungsbereichen PKW (PT-Segment), LKW (CT-Segment) sowie Baumaschinen (CON-Segment). Global Plastics beliefert primär deutsche Premium-OEMs weltweit und gilt als Qualitätsführer im Interior-Markt. Der globale Interior-Markt ist zunehmend von einem durch asiatische Wettbewerber generierten Preisdruck geprägt, die den Qualitätsansprüchen europäischer Kunden immer besser entsprechen.Sie wurden durch den Vorstand der Global Plastics AG beauftragt, einen Transformationsplan zu entwickeln, der die langfristige Wettbewerbsfähigkeit des Unternehmens sicherstellt. Ziel Ihres Workstreams ist die Analyse des aktuellen Produktionsnetzwerks sowie die Erarbeitung neuer Hebel für Wachstum. Die Global Plastics AG hat Ihnen zur Analyse ihre GuV und Bilanz zur Verfügung gestellt. Dort sind die Ergebnisse der Geschäftsjahre 2019 bis 2021 sowie der Forecast für das Geschäftsjahr 2022 (drei Monate Ist + neun Monate Plan) enthalten. Bitte lösen Sie die beiden unten aufgeführten Aufgaben.
1.0k times solved
Difficulty: Intermediate
Interviewer-led
Growth strategy
Market analysis
Operations strategy
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.
200+ times solved
Difficulty: Advanced
Candidate-led
Non-conventional
Public sector
Case by
PrepLounge
Madflix.com
Our client is madflix.com, a website similar to Netflix. The biggest difference is however that Madflix targets mainly men and provides a majority of “mad movies”, such as action, horror, or science-fiction movies.Clients sign up online, order online, receive the movie and mail it back. Madflix is not satisfied with the profit margin, as it has declined over the last two years.The CEO has hired us to recommend a solution.
54.3k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Profitability analysis
Case by
PrepLounge
General Holding
Our client is a French holding company with annual revenues of about €1 billion. Their portfolio consists of different companies that are mostly in manufacturing industries such as the oil & gas industry and the automotive industry.They do not have a specific investment focus. They prefer to buy the best companies available that are also related to their existing businesses.They are thinking about acquiring an auto parts dealer, OTOpart, and want to know whether you think it is a good idea.
47.5k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Mergers & Acquisition
Case by
PrepLounge
Cost of Capital Interview Questions for Finance
This set of questions is designed to help you master the core concepts behind a company’s Cost of Capital. The progression takes you from the mechanics of calculating the Weighted Average Cost of Capital (WACC) to how risk factors like Beta and Size Premiums are incorporated, and finally to the implications for company valuation.In total, working through this set in an interview would take around 30 minutes. It is well-suited for interviews in corporate finance, investment banking, or private equity. Below, you’ll find model answers for each question, along with interviewer notes on what to look for in candidate responses.
< 100 times solved
Difficulty: Intermediate
Interviewer-led
Mergers & Acquisition
Valuation
Expert case by
Benjamin
Revolut Mock Interview: Strategy & Operations
You are part of the Strategy &amp; 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. 
300+ times solved
Difficulty: Advanced
Interviewer-led
Operations strategy
Case by
PrepLounge
Airline Economics
We are an airline major operating out of India. We want to increase the number of passengers on all our flights. Could you please calculate the financial return of adding one more passenger per flight?
18.3k times solved
Difficulty: Intermediate
Candidate-led
Market sizing
Profitability analysis
Case by
PrepLounge
OnlineGo
The client, OnlineGo, is a European Internet Service Provider (ISP) that is contemplating entering the North American market. Currently, they hold a dominant position in the European market with two streams of income; a subscription fee and taking a percentage of all e-commerce transactions done by subscribers. After studying the North American market, OnlineGo has concluded that the market is very divided and it is the perfect time to enter. You have been asked to calculate some figures to determine the potential profitability of entering the North American market.
16.6k times solved
Difficulty: Intermediate
Interviewer-led
Market analysis
Market entry
Profitability analysis
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
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.
91.1k times solved
Difficulty: Beginner
Interviewer-led
Growth strategy
Profitability analysis
Company case by
Oliver Wyman
Oliver Wyman Case: Full Electrons Ahead
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 year. However, sales have been far below the expected numbers. The management has engaged you to support them in understanding the reasons and advise them on how to adjust the product offering.
138.0k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Market sizing
Operations strategy
Company case by
Berg Lund & Company
Berg Lund & Company Case: Value Growth Strategy - Northern Retail Bank
Du befindest Dich derzeit in einem strategischen Projekteinsatz bei der Northern Retail Bank (NRB), die vor drei Jahren von einem Finanzinvestor übernommen wurde. Während des Mittagessens lädt Dich der CEO zu einem Espresso in sein Büro ein. Dort erläutert er, dass der Finanzinvestor bestrebt ist, den Unternehmenswert der Bank zu steigern – möglicherweise für einen künftigen Verkauf oder Börsengang, weitere Details stehen zum jetzigen Zeitpunkt noch nicht fest. Gemeinsam mit Deinem Projektteam sollst Du nun Maßnahmen entwickeln, um die Profitabilität der Bank zu verbessern. Angesichts der Ergebnisse des letzten Geschäftsjahres und des intensiven Wettbewerbsdrucks sieht der CEO hier dringenden Handlungsbedarf.Der CEO bittet Dich darum, in 30–45 Minuten in sein Büro zurückzukommen, um Deine fachkundige Einschätzung für erste konkrete Stellhebel zu diskutieren.
4.1k times solved
Difficulty: Intermediate
Interviewer-led
Operations strategy
Restructuring
Expert case by
Antonello
Caribbean Island – MBB Final Round
A wealthy client has recently bought an island in the Caribbean. She has engaged us to identify possible uses for her new island.
17.4k times solved
Difficulty: Intermediate
Candidate-led
Brain teaser
Market sizing
Profitability analysis
Valuation
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
Case by
PrepLounge
Practical LBO Interview Questions for Finance
This set of questions helps you apply key LBO concepts in practical, realistic interview scenarios. You'll explore how leveraged buyout logic is used to assess deal structures, compare financing options, and evaluate the impact of working capital changes, covenants, and dividend recapitalizations on investor returns.In total, walking through this set in an interview would take approximately 35 minutes, making up around 70% of a typical 45-minute interview. Below, you’ll find model answers for each question, along with tips for the interviewer on what to look for in candidate responses.
300+ times solved
Difficulty: Intermediate
Interviewer-led
Mergers & Acquisition
Valuation
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&amp;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

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. 🚀

Let's Move On With the Next Articles:

The Personal Fit Interview
Basics of Case Interviews
The personal fit interview is a crucial part of the selection process in consulting. It’s often underestimated by candidates who tend to focus on the challenging case interviews only. But the personal fit interview is just as important! It’s all about determining if you’ll fit well within the team and align with the company culture. Read this article to find out why the personal fit interview matters so much and how to prepare effectively.
To the article
Key Questions in the Personal Fit Interview
Basics of Case Interviews
Consulting interviews are not just about your skills and knowledge — companies also want to see how well you align with their culture and values, often called "personal fit". This part of the interview is your chance to show you’re a natural addition to the team.Here’s a look at three common personal fit questions and some tips on how to answer them confidently and thoughtfully.
To the article
Interviewer- vs. Candidate-Led Cases
Basics of Case Interviews
Every case interview has a certain structure. An important factor on how your case interview is going to proceed is if the interview is interviewer-led or candidate-led.We’d like to explain the two interview formats – candidate-led cases and interviewer-led cases – highlight their differences, and provide you with tips on how to excel in each of them.
To the article