Step-by-step
- 1
Start PEI preparation the week you finish Solve
Do not wait for the result. Candidates report one to three weeks of silence and then as little as seven to ten days' notice before round 1.
- 2
Pick eight stories, two per dimension
Recent, with you as the decision-maker, and detailed enough to survive 8–25 follow-ups. Tag each by dimension and keep a backup for every one.
- 3
Ask the recruiter which dimension round 1 tests
Some offices say. Prepare all four anyway, because the final round can repeat a dimension and the order is office-dependent.
- 4
Run one full mock per dimension
Answer follow-ups in one to three sentences; fix every "we", every missing number and every missing obstacle before the real thing.
- 5
Drill cases in parallel, not instead
The case fills 30–45 minutes of each interview, but coaches say the PEI carries roughly equal weight and a weak one alone can end a candidacy.
The seven stages and the gaps between them
McKinsey's careers page describes the pieces: an application, for most candidates the Solve assessment, then interviews that for most client-facing roles combine a PEI (Personal Experience Interview) with a problem-solving case; recruiters confirm details in advance. It does not publish timelines. The gaps below are what candidates report on PrepLounge and Glassdoor and what coaching sites summarize.
End to end, five to eight weeks; Glassdoor's average sits around 40 days. Add the interviews up and a typical candidate sits four to six PEIs. That is the number to prepare for.
- Application to Solve invite: one to three weeks.
- Solve to result: three days to three weeks, usually 10–14 days; busy offices up to two to three weeks, and batch reviews up to six weeks.
- Result to first-round date: one to three weeks, often only seven to ten days.
- Round 1: typically two 45–60 minute interviews, each a PEI plus a case.
- Round 1 to final round: about one week.
- Final round: two to four interviews with partners, same format.
- Final round to offer: same day to one week.
The dimensions, scoring and story plan are in the McKinsey PEI guide.
Application and Solve
Campus recruiting runs in waves, per coaching-site calendars: undergraduate full-time first rounds in August to October with finals in September to November; MBA first rounds in September to October with finals in October to November; MBA internship interviews from November into January. Experienced hires apply on a rolling basis all year, with the busiest stretch in March to May and interviews within weeks of applying.
Solve is McKinsey's gamified online assessment, the successor to the Problem Solving Game. McKinsey's careers page says "There's no need to prepare—just approach it with curiosity and creativity." Most candidates prepare anyway; SolvePrep (our Solve simulator) exists for that step. Experienced hires in the US often skip Solve, per candidate reports.
Here is the mistake that costs the most time: treating the Solve result as the starting gun for interview preparation. Every coach in a 2026 PrepLounge thread on post-Solve timing says to start PEI and case preparation before the result arrives.
The silence, then the invite
After Solve comes a gap of three days to three weeks in which you hear nothing, per candidate reports. Then the invite lands with one to three weeks' notice, sometimes only seven to ten days. Counting from the day you finish Solve, that leaves roughly two to five weeks of usable preparation, and the acute window after the invite is one to two weeks.
Use the invite email. Coaches consider it acceptable to ask the recruiter which PEI dimension you will be assessed on; some offices say in advance and some do not. McKinsey's careers page says recruiters confirm details ahead of the interview, so the question is routine.
What the 10–20 minutes of the PEI look like inside each interview is in the McKinsey PEI format guide.
Round 1: two interviews, each with a PEI and a case
Round 1 is typically two back-to-back 45–60 minute interviews with associates or engagement managers; some offices run one. Each interview opens, usually, with a PEI of 10–20 minutes and continues with a 30–45 minute case. Both interviewers take notes and, per a former senior engagement manager who interviewed candidates in Asia, decide jointly with a neutral recruiting person present.
Each PEI tests one of four dimensions: Leadership, Connection, Drive and Growth (formerly Inclusive Leadership, Personal Impact, Entrepreneurial Drive and Courageous Change; coaches and candidates report the rename in 2025, and McKinsey's localized careers pages still show the old names). One dimension per interviewer, one story, probed with 8–25 follow-ups. Do not reuse a story with the second interviewer; coaches and an employee posting on Fishbowl describe the no-reuse norm within a round.
The failure pattern coaches see most: a strong case and a PEI told in "we", with no obstacle and no number. Former interviewers say the PEI is weighted roughly equally with the case and that a weak one alone can end a candidacy, so split your preparation accordingly.
Our AI interviewer runs one story at full PEI depth and scores it on six criteria. Run a free PEI mock.
The final round: partners, judgment, and the 2026 pilots
The final round is two to four interviews with partners, in the same PEI-plus-case format, about a week after round 1. Coaches say partners probe judgment and presence harder; expect counterfactuals ("what if they had said no?"), trade-off questions and composure checks. The same dimension can recur from round 1, and whether partners compare your round 1 stories is disputed among coaches, so bring fresh material where you can.
Two pilots reported in 2026 US final rounds, both described by Management Consulted and both single-source, so treat the scope as provisional. First, a "Lilli" AI interview: candidates work a case with McKinsey's internal generative-AI tool; it is described as non-evaluative and layered on top of the PEI and case. Second, a client-conversation interview: a 20-minute free-flowing stakeholder role-play that replaces the PEI in one of three final-round interviews, also described as non-evaluative, while the other two interviews keep the PEI.
Separately, press reports in 2026 describe a free McKinsey AI practice tool for quantitative case practice. It does not cover the PEI. McKinsey's careers page says "When used responsibly, we see AI as a valuable tool that supports preparation" and that using AI to generate answers during an interview is not allowed.
Experienced hires and other tracks
Experienced hires, including engagement-manager and associate-partner level, still sit a PEI, per candidates and coaches. The sequence often adds an initial assessment call of about 20 minutes, expertise or technical interviews, PEI questions tailored to your domain, and probing on commercial potential; Solve is often skipped in the US. Stories are expected mostly from work, and the two-to-three-year recency convention relaxes for senior candidates.
Other tracks differ at the edges. Implementation runs the same PEI plus case with a practical lens; one rejected candidate was told to show influence in weeks, not months. Generalist digital roles add a "why McKinsey Digital" conversation; technical roles add a skills test, a short lightning talk and a technical case, per coaching sites. Some offices run a Values and Purpose interview that, per one coaching site, uses the same probing loop; do not reuse a PEI story in it. Internal and non-consulting roles have their own formats.
Business analyst (undergraduate), associate (MBA) and advanced-degree candidates get the same PEI format. Coaches say university stories are fine for business analysts, while MBA and experienced candidates are expected to draw mostly on work.
The offer, and where PEI practice fits
Offers come the same day to a week after the final round; campus MBA offers typically land before Thanksgiving, per coaching-site calendars. Across the whole process you will have told four to six PEI stories and answered dozens of follow-ups about them.
Most candidates spend about 95 percent of their preparation on cases, per PrepLounge's guide, and one Fishbowl thread names the PEI as the most common reason for failing the final round. The fix is cheap: eight stories, two per dimension, each rehearsed as a dialogue with 8–12 follow-ups until it survives ten minutes of probing. Start the week you finish Solve, not the week the invite lands.
The first full mock is free, with an account and no card. Run a free PEI mock.
Put it into practice
Tell one story to an AI interviewer and see which answers hold up under follow-up questions.
Run a free PEI mock