The McKinsey online assessment has three stages: the Solve game (timed ecosystem games measuring critical thinking), the Personal Experience Interview (structured leadership and impact stories), and the interviewer-led case interview (thinking out loud with structure under observation). Failing any one ends the process — and most candidates over-invest in cases while under-investing in the other two.
This guide covers the 2027 intake at McKinsey & Company — applications open in 2026 and are reviewed on a rolling basis, so applying early gives you the strongest chance. Confirm exact dates on McKinsey & Company's official careers page.
McKinsey Online Assessment, Part 1: The Solve Game
The McKinsey online assessment starts with the Solve game — ecosystem-themed games including Red Rock (a strategy simulation) and an ocean cleanup game. They look like video games, which is the trap: what they measure is critical thinking, data interpretation, and structured decision-making under time pressure. Gaming reflexes do not help; analytical discipline does.
- The games are timed — hesitation costs you.
- You cannot retake them — your first attempt counts.
- Invitations can arrive within days of applying, so prepare before you submit, not after.
Practice the mechanics in advance so that on the day, all your attention goes to the decisions, not the controls.
The Personal Experience Interview (PEI)
Pass Solve and you face the PEI alongside your cases. This structured behavioral interview covers three themes: leadership, personal impact, and resilience in the face of challenge. The interviewer will push for detail — what exactly you did, what the numbers were, what went wrong.
- Prepare three to four stories with a clear situation, your specific actions, and quantified results.
- Treat the PEI as half the interview, because it is.
- We detail the most common PEI failure patterns in our guide to application mistakes to avoid.
The Interviewer-Led Case
Unlike candidate-led cases at other firms, McKinsey's interviewer drives the case. You get prompts, data, and exhibits; you are expected to structure problems on the fly, build issue trees from scratch, and do clean mental math under observation.
- Memorizing frameworks backfires — interviewers steer you off a template and watch how you adapt.
- Practice with a partner using real interviewer-led formats. The skill is thinking out loud with structure, and it only improves through reps.
How to Prepare for the McKinsey Online Assessment
Start with Solve practice now, lock in your PEI stories early, and drill interviewer-led cases weekly until the interview. We walk through the full application sequence in our step-by-step guide to how to apply to McKinsey.
Frequently Asked Questions
What does the McKinsey online assessment test?
Critical thinking and structured decision-making under time pressure — not gaming skill. The games measure how you interpret data and make trade-offs, similar to the analytical work consultants do.
Can I retake the McKinsey Solve game?
No. Your first attempt counts, which is why preparing the mechanics before you apply is essential.
How long does the McKinsey assessment process take?
Timelines vary by office. Solve invitations usually arrive within days to a few weeks of applying; check the official McKinsey careers page for your office's current process.
What is the difference between the PEI and a normal behavioral interview?
The PEI is far more structured and probing — the interviewer drills into specifics of your stories rather than accepting surface-level answers.
Applying to McKinsey? Our 2027 McKinsey Solve Game & Case Interview prep covers the real questions — $79 one-time, instant download. It's the fastest way to walk into the Solve game and the case interview knowing exactly what to expect.
