The Personal Experience Interview is the half of the McKinsey interview candidates most often under-prepare. This guide covers the PEI as it runs in 2026: the four dimensions under their current names, the interview mechanics candidates consistently report, the questions and follow-up probes you should expect, and a story method that survives fifteen minutes of drilling.
The Four Dimensions
In summer 2025, McKinsey renamed the four PEI qualities. What each one tests did not change, but the labels did, and older prep material still uses the former names everywhere. Anchor your preparation on the current names and treat the old ones as synonyms you will keep running into.
| Dimension | Former Name | What It Measures |
|---|---|---|
| Connection | Personal Impact | Influencing and persuading others, especially when they disagree with you |
| Drive | Entrepreneurial Drive | Grit, ownership, and execution through obstacles, often outside your comfort zone |
| Leadership | Inclusive Leadership | Leading people with different backgrounds toward a goal, with or without formal authority |
| Growth | Courageous Change | Adapting, learning and improving when things do not go as planned |
One clarification worth making: problem-solving is not a PEI dimension. McKinsey assesses it through the separate Problem-Solving (case) Interview.
How the PEI Actually Runs
Each McKinsey interview opens or closes with a PEI segment of roughly 10 to 20 minutes. The mechanics are unlike any other firm's fit interview:
- Typically one dimension per interviewer. Each interviewer is often assigned a single dimension and probes mainly that one. Across a first round (typically two interviews) and a final round (typically three), you will usually be tested on all four.
- One story, drilled to the bottom. The interviewer asks one opening question, "Tell me about a time you had to win over someone who disagreed with you", and then typically asks a long string of follow-up questions (often 10 or more) about that single story.
- The follow-ups are the interview. Expect probes such as "What exactly did you say to them?", "Why that approach and not another?", "How did you feel at that moment?", "What would you have done if it hadn't worked?", and the classic "That sounds like the team's work, what did you specifically do?"
This is why memorised, polished narratives fail in the PEI. A rehearsed two-minute story survives the opening question and collapses on follow-up four. The only preparation that works is knowing your stories so deeply that every layer holds. The most reliable way to test that depth is to build and rehearse your PEI stories with scored feedback, against follow-ups you did not script.
How Many Stories You Need
Standard prep guidance recommends preparing two stories per dimension, eight in total. Two matters: if the interviewer feels your first story is thin, they may ask for another example of the same dimension on the spot.
Each story should be recent (ideally within the last three years), high-stakes enough to impress a partner, and unambiguously yours, your decisions, your words, your results.
The SPAR Method
A story format that survives drilling needs more than STAR's surface structure. We recommend SPAR, with strict timing for the spoken version:
- Situation (~10 seconds), one sentence of context. Resist the urge to explain the whole company.
- Problem (30 to 45 seconds), the conflict, the stakes, and why it was hard. This is where most candidates underinvest.
- Action (60 to 90 seconds), what you did, decision by decision. Use "I", name the people, quote what you actually said.
- Result (20 to 30 seconds), the measurable outcome, plus one sentence of honest reflection.
The reflection matters more than candidates think: interviewers probing Growth and Leadership are listening for self-awareness, and "what I would do differently" is often the question that decides the score.
Representative Opening Questions by Dimension
The questions attributed to McKinsey below were published on the firm's interviewing page under the former dimension names; the substance carries over unchanged. The variants are representative questions in the same style, reconstructed from consistent candidate reports rather than from McKinsey.
- Connection (formerly Personal Impact): McKinsey's published sample for this quality is "Explain a challenging situation you encountered when working with someone with an opposing opinion to yours." Also expect variants like "Tell me about a time you changed the mind of someone senior to you."
- Drive (formerly Entrepreneurial Drive): McKinsey's published sample is "Talk about a time when you had to work to achieve something in a limited period of time that was outside your comfort zone." Variants: "Tell me about the hardest goal you have ever set yourself."
- Leadership (formerly Inclusive Leadership): McKinsey's published sample is "Share an example of an instance where you effectively worked with people with different backgrounds." Variants: "Tell me about a time you led people who didn't want to be led."
- Growth (formerly Courageous Change): No official sample question was published for this area; representative openings include "Describe the biggest setback of your career and what changed because of it."
The Mistakes That Cost Offers
- "We" instead of "I". The single most common PEI failure. The interviewer will redirect you once; after that, they score it.
- Old stories. A university anecdote from six years ago signals you haven't done anything notable since.
- Low stakes. "I organised the weekly newsletter" cannot carry fifteen minutes of probing, no matter how well told.
- No emotional layer. "How did you feel?" is a real scoring question. Candidates who answer with process instead of honesty read as rehearsed.
- A perfect ending with no reflection. Stories where nothing went wrong and nothing was learned score poorly on Growth, and raise authenticity flags everywhere else.
How to Practice
Reading about the PEI is not preparing for the PEI. The skill is surviving live follow-ups, and that requires a sparring partner who pushes back, asks for specifics, and refuses vague answers.
CasingLab's PEI module was built for exactly this: write your eight stories in a structured SPAR story bank, get each one scored against a rubric calibrated by our ex-MBB consultants (with the two follow-up questions most likely to expose your weak spots), then face a full mock PEI with an AI interviewer that drills your story with follow-ups, one at a time, just like the real thing. CasingLab is now open. Start the free diagnostic and see your readiness score in five minutes.
For the rest of the McKinsey process, Solve, cases, and timeline, see our McKinsey interview guide. For BCG and Bain's very different fit formats, see the BCG interview process guide and the Bain behavioral interview guide.