What Are the Main Types of Case Interviews? Problem Types and Formats Explained

Case interview "types" mean two different things: the business problem, such as profitability, market entry, pricing, or M&A, and the delivery format, such as interviewer-led, candidate-led, written, or group. Learn both. The problem type shapes your analysis. The format changes how you receive data, drive the case, and present the answer.

What Are the Two Axes of a Case Interview?

The first axis is the client decision. This tells you what the analysis must prove. The second axis is the delivery format. This tells you who controls the sequence, how evidence arrives, and what output you must produce.

There is no universal official count of case types. Lists with eight, ten, or fourteen categories are editorial taxonomies. Use categories to recognize a problem, not as scripts to memorize.

Business problem types

Digital transformation, product launch, customer profitability, and competitive response often fit inside these decisions. A technology prompt may be a growth or operations problem. A customer-profitability prompt is a profitability problem that requires segment economics. The label matters less than the decision it helps you structure.

Delivery formats

Candidate-led cases

You propose the structure, request information, choose what to test, and keep the discussion moving. The interviewer still controls the facts. Your job is to explain why each next analysis matters.

Interviewer-led cases

The interviewer sets the sequence through distinct questions and exhibits. You still structure each response, state a conclusion, and connect it to the overall client decision. Do not mistake interviewer control for permission to answer without a plan.

Written or presentation cases

In a written case, you receive a packet of information, analyze it within a stated preparation window, and deliver a memo, slides, or presentation. Prioritization matters because the packet usually contains more information than the final answer needs. Use answer-first synthesis: lead with the recommendation, then show the evidence, risk, and next step.

Group cases

In group cases, several candidates solve or present a case together. Assessors can observe analysis and team behavior at the same time. Add value, make the group's reasoning clearer, invite useful input, and help the team reach a decision. Dominating airtime is not the same as leading.

Your invitation and recruiter are the controlling sources for the exact format. Firm and office practices can change.

How to identify the business problem quickly

Use the client's decision, not one keyword.

Worked example: one hybrid case on both axes

Prompt: A mid-sized software company wants to grow annual recurring revenue from $200 million to $500 million in three years. It is considering buying a competitor.

Business problem axis: This is an acquisition decision serving a growth goal. Start with the $300 million growth gap. Test how much organic growth can deliver, then ask whether the target closes the remaining gap at an acceptable price and risk.

Format axis: In a candidate-led case, request the target's revenue, retention, price, and integration facts in the order your structure requires. In an interviewer-led case, structure each question and keep linking the supplied exhibit back to the $300 million gap. In a written case, prioritize the few exhibits that prove value and feasibility. In a group case, align the team on the decision criteria before dividing analysis.

Synthesis: The client should buy only if the target closes a defined share of the growth gap, the combined economics justify the price, and integration risks have owners and tests. "Acquiring" names the transaction. It does not replace the growth and value-creation analysis.

Now test whether you can turn one client decision into useful branches.

What to practice next

Use the case frameworks lesson if you can identify the problem but cannot turn it into tailored branches.

Then apply both axes in one complete case. The HarborHealth case is a healthcare acquisition with valuation, synergy, and integration evidence. It lets you practise an M&A problem inside a live case format.

Sources and evidence boundary

• McKinsey Careers, Interviewing, checked 2026-09-04, describes its current problem-solving interview process.
• Bain Careers, Interviewing, checked 2026-09-04, describes role-specific interviews and case preparation.
• BCG Careers, Case Interview Preparation, checked 2026-09-04, describes current case preparation and assessed skills.

The two-axis taxonomy and examples above are Road to Offer teaching guidance. They are not an official cross-firm standard.