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 provided by 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.
4.4
93.2k 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?
4.9
1.9k 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!

Company case provided by Company case by
Mercedes-Benz Management Consulting
MBMC Case: Exploring the future of automotive mobility
As a consultant at Mercedes-Benz Management Consulting (MBMC), you are actively shaping the future of automotive mobility. While you are contributing to decisive projects that design the future of the world’s No.1 premium carmaker, you also develop your own career path, and you have the unique possibility to build your personal brand and cultivate relationships with the top management.Your client on your current project is the head of product strategy who reports directly to the CEO. She asks you to explore new profit pools and business opportunities regarding innovations and monetarization strategies.Initially, you shall structure and explore potential business models, and discuss necessary conditions and implications of these business models. In a next step, you shall quantitatively analyze possible options and prepare them for decision. And of course, the client is interested in your recommendation.
3.6
12.4k times solved
Difficulty: Intermediate
Interviewer-led
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.
4.5
1.2k times solved
Difficulty: Intermediate
Interviewer-led
Non-conventional
Case by
PrepLounge
Sticky USB-Sticks
Du berätst den USB-Stick Produzenten "Sticky". Das bisher profitable USB-Stick Geschäft wird dieses Jahr zum ersten Mal rote Zahlen schreiben. Dein Klient würde gerne wissen, wie er wieder Gewinne erzielen kann.
4.6
8.5k times solved
Difficulty: Intermediate
Interviewer-led
Competitive response
Growth strategy
Operations strategy
Profitability analysis
Case by
PrepLounge
Debt & Credit Analysis – Interview Questions for Finance
This question set covers the fundamentals of debt instruments, credit metrics, and risk assessment. It mixes definitions, calculations, and case-style questions to prepare you for corporate finance and investment banking interviews.
5.0
100+ times solved
Difficulty: Intermediate
Interviewer-led
Non-conventional
Company case provided by Company case by
BearingPoint Germany
BearingPoint Case: Nachhaltigkeit on the Road – Potenziale der Kreislaufwirtschaft für den Automobilhersteller
Der Automobilhersteller YourCars denkt zunehmend darüber nach, wie er seine Kosten senken und gleichzeitig seinen ökologischen Fußabdruck minimieren kann. Eine mögliche Lösung besteht darin, die Prinzipien der Kreislaufwirtschaft, insbesondere die „5Rs" – Refuse, Reduce, Reuse, Repurpose, Recycle – in seine Produktionsprozesse zu integrieren. Hauptziel dieser Überlegungen ist es, den Verbrauch und die Verschwendung von Ressourcen zu minimieren, die Lebensdauer von Produkten und Materialien zu maximieren und letztendlich einen nachhaltigeren und effizienteren Betrieb zu gewährleisten. Zu diesem Zweck beauftragt die Geschäftsführung eine Unternehmensberatung mit der Erarbeitung erster Ansätze.Du als Unternehmensberater:in sollst der Geschäftsführung die Chancen und Risiken des Kreislaufwirtschaftsansatzes erläutern. Darüber hinaus möchte die Geschäftsführung wissen, in welchen Bereichen Einsparpotenziale bestehen. Schlussendlich sollst du basierend auf der Analyse eine Empfehlung aussprechen.
4.2
9.7k times solved
Difficulty: Intermediate
Interviewer-led
Operations strategy
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. 
4.0
1.2k times solved
Difficulty: Advanced
Interviewer-led
Operations strategy
Case by
PrepLounge
Unified Health
Our client is Unified Health, a health care company in the US. It insures patients and provides health care services. Employers pay a premium to UH for their employees and UH covers all necessary medical costs. UH has 300,000 patients enrolled. It has 300 salaried physicians covering 6 health centers which aren't owned by UH, but UH contracts local hospitals. If a patient needs medical care not covered by a UH physician, the patient is reffered outside the network and UH pays for all costs.Over the past 6 months UH has suffered declining profitability and you are hired to figure out what is wrong.
4.3
20.4k times solved
Difficulty: Intermediate
Interviewer-led
Profitability analysis
Public sector
Case by
PrepLounge
Music Streaming - Market Sizing
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 trying to understand how many hours people listen to the number one music streaming platform (the one with the green logo) in total and on average per year. How would you approach this problem to help your friend answer his question?
4.4
9.5k times solved
Difficulty: Beginner
Interviewer-led
Brain teaser
Market sizing
Profitability analysis
Case by
PrepLounge
Juice producer
A major juice producer sells packaged fruit juice to retail outlets. Normally, the juice is packed and sold in 16-ounce carton containers, but recently the producer added a new machine that packages the juice in 32-ounce plastic containers. So he was selling both the 16-ounce & the 32-ounce products. This allowed the business to grow 18% per year, but as sales continued to rise, profits kept falling.The producer hired us to figure out why profits are falling despite higher revenues.
3.9
5.1k times solved
Difficulty: Beginner
Candidate-led
Profitability analysis
Company case provided by Company case by
Forvis Mazars
Forvis Mazars Case: Prüfung der Carvermietungen GmbH
Sie sind Abschlussprüfer der CarVermietungen GmbH, einem deutschen Unternehmen, das geleaste Fahrzeuge europaweit an Privat- und Geschäftskunden weitervermietet.Im Rahmen der Prüfung führen Sie Interviews mit dem Management des Unternehmens durch. Dabei wecken insbesondere die langfristigen ökologischen und digitalen Herausforderungen der Firma Ihr Interesse. Sie erfahren unter anderem, dass die Hauptunterschiede zum üblichen Geschäft in einem Transformationsplan liegen und lassen sich vom CFO den Plan vorstellen.Die Finanzdirektorin teilt Ihnen stolz mit, dass die CarVermietungen GmbH in die Elektrifizierung der Fahrzeugflotte investiert. Die Anzahl der Elektroautos wird im Lagebericht veröffentlicht. Die CarVermietungen GmbH bietet ihren Kunden seit dem vierten Quartal eine Erweiterung zum bestehenden Bonusprogramm an. Die Kunden können ihre gesammelten Bonuspunkte am Jahresende auf ein Umweltprogramm übertragen, das vorwiegend in den Anbau von Bäumen und Wasseralgen investiert, um die klimafreundliche CO2-Bindung zu fördern. In diesem Zusammenhang hat das Unternehmen auch eine weitere Zielgruppe definiert und eine entsprechende Kundenliste erstellt. Darüber hinaus wurden im laufenden Geschäftsjahr durch den Zukauf von Daten über ein soziales Netzwerk zusätzlich neue Kunden hinzugewonnen.Die CarVermietungen GmbH hat im letzten Quartal außerdem in P2P-Carsharing investiert, da sich dieses neue Geschäftsmodell im Ausland bereits als vielversprechend erwiesen hat. Private Autobesitzer haben die Möglichkeit, ihr Fahrzeug über die Carsharing-Plattform anzubieten und die Vermietung gänzlich über eine App abzuwickeln. Die Mietwagengebühren betragen ein Drittel des Mietwertes und die CarVermietungen GmbH zahlt eine Versicherung, die jeden Kunden abdeckt. Die Versicherungsprämien für das Folgejahr wurden bereits ausgezahlt.
4.0
8.8k times solved
Difficulty: Intermediate
Interviewer-led
Audit
Valuation
Case by
PrepLounge
M&A & Synergies Interview Questions for Finance
This question set explores the essentials of Mergers & Acquisitions (M&A) with a strong focus on synergies, valuation implications, and deal structuring. The progression starts with a general rationale for M&A, then moves into mechanics like accretion/dilution and synergy valuation, before covering more advanced areas such as goodwill, tax attributes, cross-border deals, and earn-outs.Working through this set should take around 30–35 minutes, making it well-suited for interviews in investment banking, private equity, and corporate finance.
5.0
100+ times solved
Difficulty: Intermediate
Interviewer-led
Mergers & Acquisition
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.
5.0
700+ times solved
Difficulty: Advanced
Candidate-led
Non-conventional
Public sector
Company case provided by Company case by
thyssenkrupp Management Consulting
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.
3.9
27.2k times solved
Difficulty: Intermediate
Interviewer-led
Market entry
New product
Profitability analysis
Company case provided by Company case by
SET Management Consulting
New
SET Case: Your own Management Consultancy
As one of three management consultants with many years of experience, you have SET yourself the goal of founding your own management consultancy. The topics, contents and solution offering with which you can advise and support potential customers are clear. The legal company is already founded and registered in the commercial register. Now you must pitch your business plan to the banks to get the necessary start-up financing!Especially the banks are interested in the underlying rationale of the SET Management Consulting business model. Your goal is to think of relevant financial KPIs and be prepared to explain the underlying revenue and cost streams in more detail.
5.0
14.2k times solved
Difficulty: Intermediate
Interviewer-led
Market entry
Profitability analysis
Expert case by
Cristian
StyleScape responds to customer feedback (McKinsey final round)
Style Scape is a mid-sized retailer that sells clothing, accessories, and home goods through its physical stores and online platform. The business has been around for over a decade and has seen consistent growth in sales in its home market of the United States. Style Scape operates 30 stores nationwide, and its online platform is relatively new, having launched only two years ago.Despite healthy growth, the company's leadership has noticed an alarming decline in customer satisfaction ratings and an increase in customer complaints. They are concerned that these issues will harm the company's reputation and negatively impact its bottom line. The CEO of Style Scape has requested your assistance in determining the root causes of these issues and developing recommendations to address them.
5.0
1.9k times solved
Difficulty: Advanced
Interviewer-led
Competitive response
Growth strategy
Market analysis
Organizational behavior
Case by
PrepLounge
Smart Meters
The municipal utility Hamburg Energized is a local energy retail (power and gas) and distribution grid company active in the city of Hamburg. The majority of shares of Hamburg Energized is held by the city itself. As the distribution system operator of Hamburg, Hamburg Energized is responsible for the operations and maintenance of the gas and electricity grid on customer level.In the course of the energy transition in Germany, the responsible board member for the technical grid operations, Jan Bremer, thinks about deploying Smart Meters in the gas and electricity grid. He approaches you with the request to conduct a feasibility analysis and to give a clear recommendation whether or not Hamburg Energized should use Smart Meters in its gas and electricity grid in the future.
4.4
35.3k times solved
Difficulty: Intermediate
Interviewer-led
Market analysis
Market entry
New product
Operations strategy
Profitability analysis
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.
4.5
1.3k times solved
Difficulty: Beginner
Interviewer-led
Growth strategy
Case by
PrepLounge
Fast Food Pricing
Our client is a global fast-food restaurant that offers a wide range of breakfast and rest of day products including burgers, salads, fries, and beverages, and offers combo bundles. Over the last ~5 years in the US, our client has seen a relatively flat guest count, but a decline in profitability. They have launched severallarge national advertising campaigns focused on highlighting their "value" products which have not turned around profits the way they had hoped. The head of the US business has asked us to help him understand why gross margin is decreasing, and specifically to take a look at his menu's pricing.Is there an issue with the menu pricing structure? If so, what would you recommend to restructure the pricing?What is the overall implications to volume and gross margin with a revised pricing structure?
4.5
8.0k times solved
Difficulty: Intermediate
Interviewer-led
Pricing
Profitability analysis
Case by
PrepLounge
PE Portfolio Strategy
We are a private equity firm operating primarily in the automotive industry. We would like you to figure out whether we should increase our portfolio in the sensor market or not.We would like you to do a profit/margin growth potential analysis and tell us how we can add value to this company given the other companies in our portfolio.
4.1
9.6k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Profitability 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. 🚀

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