PartnerRoundMcKinsey PEI: the themes, sample questions and a story template (2026)
What the McKinsey Personal Experience Interview tests, the themes as commonly described, 16 sample questions, the follow-up ladder and a story template you can fill in.
Updated 20 Oct 2026By the PartnerRound team14 min read
TL;DR
- The McKinsey PEI is one experience, told briefly and then probed in depth, commonly for 10 to 20 minutes of an interview.
- Each PEI targets one theme. As commonly described: personal impact, entrepreneurial drive, inclusive leadership and courageous change. Check your invitation for the current names.
- Tell it in STAR form with about 60% of the time on your own actions, then expect five rungs of follow-up: facts, actions, reasons, other people, reflection.
- Bank 6 to 10 true, recent stories with at least two per theme, written as bullets with numbers, the people involved and what you would change.
McKinseyNordwind Airlines: the vanishing marginProfitability · Medium
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Interviewer
Our client is Nordwind Airlines, a short-haul carrier operating out of northern Europe. Over the past three years passenger numbers have grown 18%, but operating profit has fallen by roughly 40%. The CEO wants to understand what is driving this and what to do about it. How would you approach the problem?
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What the McKinsey PEI is
The McKinsey PEI (Personal Experience Interview) is the part of a McKinsey interview where you describe one experience from your past and the interviewer probes it in depth. Each PEI targets one theme, such as personal impact or entrepreneurial drive, and candidates commonly report spending 10 to 20 minutes on a single story. What works is a true story, told in two or three minutes with the weight on your own actions, that holds up under question after question about what you did and why.
Most McKinsey interviews pair a PEI with a case, so you will usually face one in every round. It is assessed as seriously as the case. A candidate with strong cases and a thin PEI story is a common way to miss an offer.
This guide covers the themes, how the conversation runs, a STAR structure adapted for depth, the follow-up ladder, 16 sample questions and a template for your story bank. For the full method with practice checks, take our fit interview and PEI lesson.
The PEI themes McKinsey assesses
McKinsey publishes what it looks for in its own recruiting material, and the labels have changed over the years. Older guides commonly describe three themes: personal impact, entrepreneurial drive and leadership. More recent descriptions commonly list four, adding courageous change, and accounts differ on how that fourth theme sits alongside entrepreneurial drive in a given office or year.
How a PEI conversation runs
- 01The promptOne theme, phrased as 'tell me about a time'
- 02Your tellingTwo to three minutes, in STAR form
- 03The ladderProbing questions, most of the time
- 04ReflectionWhat you learnt, what you'd change
- 05The caseThe interview moves on
The interviewer will often let you choose the story, then interrupt early to steer you towards the part they care about. That is normal and not a bad sign. If your story doesn't fit the theme, some interviewers ask for a different one, so have a second story for each theme ready.
It is fine to take ten seconds to pick your story: 'Let me think of the best example.' A considered choice beats the first story that comes to mind. In many offices, candidates also take McKinsey's online assessment before interviews; our McKinsey hub covers that stage and the McKinsey case interview guide covers the case half of each interview.
STAR, adapted for the PEI
STAR (Situation, Task, Action, Result) is the right skeleton. The adaptation for the PEI is weight. Most candidates spend half their time on the scene; the interviewer wants most of it on Action, and on your own part in it, because that is what they are scoring.
Weak
In my internship the team used an old spreadsheet to price renewals. I suggested we update it, and after some discussion we did. It made the process much more accurate.
Strong
In my internship at a regional insurer, renewals were priced from a spreadsheet nobody had checked in five years. I found it was underpricing one group of policies by about 8%. The pricing lead had built it, and she was not keen to hear that from an intern. Rather than send my analysis round, I asked her for 30 minutes and walked through ten real policies with her, line by line. By the sixth she was finding the errors herself. She took the fix to the head of pricing, and the corrected rates went into the next renewal cycle.
Why: The weak answer has no stakes, no resistance and no visible decision. The strong one has a risk to the candidate (an intern challenging a senior colleague's work), a deliberate choice of approach, a specific number and a lasting change. It also invites the follow-ups the interviewer wants to ask.
The follow-up ladder
After your opening, the interviewer climbs a ladder of questions, each rung deeper into your thinking. Rehearsed stories survive the first rung and run dry by the third. Wherever you stall in practice is the detail you need to recall and write down.
If you can't remember the exact words, say so and give the substance: 'I don't remember the exact words, but the gist was that I thought my first proposal was wrong, and I asked to spend two shifts on the floor before suggesting anything else.' Honesty beats invention, and 'I don't remember' followed by the substance is a perfectly good answer.
16 sample PEI questions by theme
The prompt is usually short. The work is in the follow-ups, so the right-hand column matters more than the question.
One good story can answer several of these. A story about rescuing a failing team project can serve inclusive leadership or drive, depending on which part you emphasise. For the wider set of fit, motivation and case questions, see our list of consulting interview questions.
A story template you can fill in
Write every story on one page, as bullets, using the same fields. The example column is an entrepreneurial drive story, told in full in the next section.
Then lay your stories out side by side to check coverage. Aim for 6 to 10 stories with at least two strong ones per theme, so you never have to tell the same story twice in a round.
- Recent beats impressive. The last two or three years are better than school, unless the school story is exceptional.
- Real resistance. If nobody disagreed and nothing went wrong, it isn't a PEI story.
- Bullets, not scripts. A script sounds recited and breaks at the first follow-up.
- True in every detail. The interviewer will probe until the detail runs out.
Worked example: an entrepreneurial drive story
Worked example
'Tell me about a time you achieved something others thought unlikely'
Situation and task
In my second year at university, the student union's welfare officer told me that many students on hardship grants had no laptop of their own and relied on library computers that closed at 10pm. Nobody owned the problem. I set myself a goal: 200 laptops into those students' hands by the start of the next academic year, nine months away, with no budget.
Action
- I wrote to 25 local companies asking for their retired laptops. Three said yes, offering 260 machines between them.
- Then the setback: the university IT department refused to let student volunteers handle machines that might hold company data. The scheme stopped for six weeks, and two of my volunteers left.
- Instead of arguing with IT, I asked what would satisfy them. The answer was certified data wiping, so I found a firm that would wipe and test every machine and repair the ones worth saving, for $75 per laptop it passed, with a one-year warranty. IT signed it off.
- The firm passed 240 of the 260, so the bill was $18,000. I went back to the donor companies and asked them to fund the wiping as well, pitching it as protecting their own data. Two paid $6,000 each, and an alumni crowdfunding page raised the last $6,000.
- I worked with the welfare office on a short application form so the laptops went to the students who needed them most, not the first to apply.
Result
We handed out 240 laptops in the first week of term, 40 more than the target. The student union adopted the scheme and has run it every year since. What I'd change: I should have gone to IT on day one. The six-week pause cost us the chance to help anyone before that year's exams.
The follow-ups, with strong answers
Why 200? It was roughly the number of students on hardship grants the welfare officer thought had no laptop, rounded up. I wanted a number that would cover the need, not one I knew I could hit.
What did you say to IT the second time? 'I think we started in the wrong place. What would you need to see to be comfortable with this?' The first time I had argued that the risk was small. The second time I asked for their standard.
How did you feel when the scheme stopped? Frustrated, mostly with myself, because I'd assumed the hard part was finding laptops. I spent a weekend deciding whether to drop it, and kept going because the donors were still willing.
How do you know it made a difference? We surveyed recipients at the end of term. 150 of the 240 replied, and 135 of those said they no longer depended on library computers for coursework.
Notice what carries it: an ambitious goal the candidate chose, a real setback, a change of approach, numbers that add up (240 laptops × $75 = $18,000, raised as $6,000 + $6,000 + $6,000) and an honest lesson. It is not a story where everything went right.
Mistakes to avoid and a two-week plan
Check yourself
Halfway through your story, the interviewer asks: 'What exactly did you say to her?' What is the best response?
McKinsey interviews usually pair the PEI with a case, so rehearse them together. Our why consulting guide covers the motivation questions that often open the conversation, and the case library has interviewer-led cases in the McKinsey style.
McKinseyNordwind Airlines: the vanishing marginProfitability · Medium
Nordwind Airlines: the vanishing margin
An interviewer-led profitability case in the McKinsey style. Tell one PEI story out loud first, then run the case straight after.
Interviewer
Our client is Nordwind Airlines, a short-haul carrier operating out of northern Europe. Over the past three years passenger numbers have grown 18%, but operating profit has fallen by roughly 40%. The CEO wants to understand what is driving this and what to do about it. How would you approach the problem?
McKinseyAtlas Logistics eyes a last-mile acquisitionM&A · Hard
Atlas Logistics eyes a last-mile acquisition
A harder interviewer-led case for later in your preparation.
Interviewer
Our client, Atlas Logistics, is a regional freight and warehousing operator. They are considering acquiring Kestrel, a last-mile delivery company, for $340m. Their CFO thinks the price is high. Should they proceed?
Frequently asked questions
What is the McKinsey PEI?
The Personal Experience Interview: the part of a McKinsey interview where you describe one experience and the interviewer probes it in depth. Each PEI focuses on one theme, such as personal impact or entrepreneurial drive. Expect detailed follow-ups on what you did, why you did it and how others reacted.
What are the McKinsey PEI themes?
As commonly described: personal impact, entrepreneurial drive, inclusive leadership and courageous change. Older guides list three themes, and McKinsey revises names and definitions from time to time. Check your invitation and McKinsey's careers pages for the current version.
How long is the McKinsey PEI?
Candidates commonly report 10 to 20 minutes per PEI, as part of an interview that also includes a case. Your opening telling should take two to three minutes; the rest is follow-up questions. The exact split varies by interviewer.
How many PEI stories should I prepare?
Six to ten, with at least two strong stories per theme. More than one interviewer may ask about the same theme, and a fresh story is better than a repeat. One rich story can cover two themes.
Can I use the same story in more than one McKinsey interview?
Try not to within a round, since interviewers compare notes and a second story shows range. Across rounds it is less of a problem, but having backups means you never have to rely on it.
Can I use stories from university or outside work?
Yes, if the stakes were real and your role was substantial. Societies, sport, volunteering and part-time jobs all work. Recent stories are better, and those where you influenced people senior to you are especially useful.
Written by the PartnerRound team
We build case interview practice: an AI interviewer that holds the answer key, guided cases, drills and a free course. Every guide is checked against the cases and drills it links to, so what you read is what you practise. Published 20 Oct 2026.
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