McKinsey case interviews are interviewer-led: the interviewer sets the sequence of questions and probes every answer you give. Led does not mean passive — you are still expected to volunteer hypotheses, propose next steps, and synthesize unprompted. The interviewer owns the path; you own every step on it.
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Formats shift by office and recruiting cycle. Treat this as the widely reported baseline — and confirm the specifics with your recruiter.
The interviewer steers a fixed sequence — structure this, size that, read this exhibit, recommend — and scores each answer against a standardized guide. There is nowhere to hide behind a favorite framework, and passivity reads as a red flag: keep volunteering hypotheses and next steps even while being led.
Most interviews pair the case with a deep, story-based PEI built around themes McKinsey now frames as Connection, Drive, Leadership, and Growth (previously Personal Impact, Entrepreneurial Drive, Inclusive Leadership, and Courageous Change). Expect one story mined in depth — follow-up after follow-up on what you specifically did — not five stories skimmed.
Before first-round interviews, many candidates complete McKinsey Solve, a gamified problem-solving assessment. Recent versions run case-style, data-and-charts exercises that score both your answers and how you reach them — which exhibits you open, when you calculate versus read. You are ranked against the applicant pool, not a fixed pass mark.
Expect explicit brainstorming prompts — 'what factors would you consider?' — and mental math with no calculator, where a clean setup and a sanity check count as much as the number itself. Whatever you answer, expect a push one level deeper.
Interviewer-led cases call for a tailored structure at the moment the interviewer chooses. Train building an issue tree for the exact question asked — reciting a memorized framework tells the interviewer you cannot think on your feet.
McKinsey interviewers routinely probe two levels down. Practice defending why your branches are the right ones — and naming the evidence that would change your mind.
The math arrives when the interviewer decides, and there is no calculator. Drill clean setups, unit discipline, and a fast sanity check — then say what the number means for the client's decision.
Synthesize before you are asked: recommendation first, then the two or three strongest points from the case, then the key risk. Practice that close until it is reflex.
McKinsey cases are interviewer-led: the interviewer controls the sequence and probes each answer against a standardized guide. Candidate-led cases — more common at BCG and Bain — reward driving the case forward; interviewer-led cases reward precise, deep answers to the exact question asked. The trap is passivity: strong candidates still volunteer hypotheses and next steps rather than waiting to be led.
McKinsey Solve is a gamified problem-solving assessment most candidates complete before first-round interviews. Its case-style exercises score both your answers and how you work through them, and you are ranked against other applicants rather than a fixed cutoff. Calm, structured problem-solving beats memorized frameworks.
Prepare a small set of true stories across the themes McKinsey probes — framed today as Connection, Drive, Leadership, and Growth — and practice telling each in depth: the situation, your specific actions, the outcome. Interviewers usually pick one story and follow up on it at length rather than skimming several, so depth beats variety.
There is no magic number. What matters is stable performance across structuring, math, exhibits, and synthesis — and you only know you are there if your practice is scored. Feedback after every case tells you whether you are converging or just accumulating reps.
Yes. CaseLab runs live voice cases where the AI interviewer sets the questions, pushes follow-ups, and brings exhibits and math prompts — the exact interaction interviewer-led cases test. Every case ends with a scored Coach Briefing that tells you what to fix next.
CaseLab is an independent case interview training platform. It is not affiliated with, endorsed by, or partnered with McKinsey & Company, Boston Consulting Group, Bain & Company, or any other consulting firm. Interview formats evolve and vary by office, so always confirm current details with your recruiter or official firm sources. Interview formats last reviewed July 2026.
Formats differ by firm. If you are interviewing across MBB, read each guide so you know what changes and what stays the same.
Candidate-led cases, the Casey online case, and exhibit-heavy analysis — and how to practice driving a case out loud.
Read the BCG guidePractical, answer-first cases, heavy market sizing, and a written-case round at some offices — and how to close every case with a clear recommendation.
Read the Bain guideStart with the free diagnostic case, or build fundamentals first with the Case Interview 101 handbook.
