Top 30 Consulting Interview Questions

McKinsey suggests preparing two stories for each of the four areas its Personal Experience Interview scores, so a strong candidate walks into the first round with eight stories ready before a single case begins. Those stories cover only one kind of question. Consulting interviews mix fit, behavioral, case, and market sizing questions, and the same few dozen come up again and again across firms. A typical interview opens with a couple of fit questions, moves into a behavioral story, and then spends most of its time on a case.

I'm Stephen Turban, founder of WSG and a McKinsey & Company and Harvard alum. I went through McKinsey's on-cycle recruiting myself, and I've since guided dozens of students through it. The 30 questions below are grouped by what the interviewer is testing, so you'll know what a good answer does for each one, which stories to prepare, and how to open each type of case.

What Questions Are Asked in a Consulting Interview?

Four types: fit questions (why consulting, why this firm), behavioral stories (led a team, resolved a conflict), case questions (a business problem you structure and solve live), and quantitative estimates (market sizing, chart reads). McKinsey, BCG, and Bain all run some mix of these in every round.

How Do You Answer Consulting Interview Questions?

Lead with the answer, then support it. For fit and behavioral questions, that means one specific story per question, told in under 90 seconds. For cases, it means stating a structure before you touch a single number. Interviewers grade how you think, so narrate the thinking.

Fit and Motivation Questions

Most interviews open here, and a clear, specific answer in the first few minutes sets a good tone for the case that follows.

1. Walk me through your resume.

Interviewers want a story with a through-line, told in about 60 seconds. Pick the two or three moments that explain why consulting is the logical next step. Skip everything else. Your interviewer already has the document in front of them.

2. Why consulting?

A good answer to "why consulting" names the moment you saw the work up close and the part of it that pulled you in. That moment might be a class project, a club engagement, or a conversation that showed you what the work is. Vague enthusiasm for problem solving doesn't give the interviewer anything to remember.

3. Why McKinsey? (Or BCG, or Bain.)

Winning answers name a person, a practice, or an engagement at that specific firm. "Prestige and smart people" describes all three firms plus twenty others. One coffee chat with a named consultant beats any ranking you can cite.

4. Why this office?

Office choice is a real screen, and interviewers can tell when the answer is invented. Tie the city to something concrete: family, a regional industry you care about, a school network. BCG asks for your top two office preferences right on the application.

5. Tell me something that isn't on your resume.

The question tests whether a person exists behind the credentials. Pick something with texture, a hobby with real reps behind it or an odd job. Consultants staff three-month teams and want teammates with some dimension.

6. Where do you see yourself in five years?

Firms know most analysts leave, so honest ambition reads better than fake lifer talk. A good answer names a skill arc, consulting first, then depth in an industry or function. Nobody expects a partner-track pledge from a 21-year-old.

7. What's your greatest weakness?

Name a real weakness with a real correction, then stop talking. Strengths in disguise ("I work too hard") signal you dodged, and interviewers often follow up with "what else?" to see whether you've thought past a scripted answer.

8. Why should we hire you?

Answer with one analytical win, one team win, and one signal you finish things. Three sentences. This is a synthesis test dressed up as a confidence test, and synthesis is the consulting skill.

Behavioral and PEI Questions

McKinsey formalizes these in the Personal Experience Interview, which since its 2025 refresh scores four dimensions: Leadership, Connection, Growth, and Drive. BCG and Bain ask for the same kinds of stories without the formal labels. McKinsey suggests preparing two examples for each dimension, so plan on eight stories, about three minutes each, told in STAR order.

9. Tell me about a time you led a team through a difficult project.

Leadership stories need a moment where the team was stuck and your specific action unstuck it. Names, headcount, deadline, outcome. "We all worked hard" describes the team, and the interviewer is asking about you.

10. Tell me about a time you changed someone's mind.

The Connection dimension rewards persuasion through understanding, never authority. Show how you diagnosed why the person disagreed, what you changed in your approach, and what shifted. Data alone rarely moves people, and interviewers know it.

11. Tell me about a time you set an ambitious goal and hit it.

Drive stories work when the goal was measurable and the odds were visibly against you. Quantify the gap between start and finish. A 40-person club you doubled says more than a title you held.

12. Tell me about a time you challenged how something was done.

Growth stories separate candidates who improve systems from candidates who survive them. Name the process, the friction you hit when you pushed, and what the change produced. Respectful persistence is the trait being scored.

13. Tell me about a failure.

Pick a failure with real stakes, and skip the humblebrag with a bow on it. What broke, what it cost, what you changed afterward. The interviewer is testing whether you metabolize failure into method.

14. Tell me about a conflict on a team.

Conflict answers are scored on diagnosis, so explain why the disagreement existed before you explain the fix. Two capable people usually disagree because they hold different information or different incentives. Say which it was.

15. Tell me about influencing someone senior to you.

Managing up is the daily reality of a first-year consultant, and this question simulates it. A professor, a boss, a club advisor all work. The winning shape: you earned the right to push by doing the work first.

Case Interview Openers

The seven case types below cover most first rounds. McKinsey publishes five practice cases (Beautify, Diconsa, Electro-Light, Talbot Trucks, and one on transforming a national education system) on its interviewing page, and Bain posts full practice cases with sample answers on its case interview page.

16. Our client's profits are declining. Why, and what should they do?

Profitability is the most common first-round case, and the split is always revenue versus cost. Segment revenue into price and volume, costs into fixed and variable, then isolate which line moved. Diagnose before you prescribe. Bain's FashionCo practice case, on a fashion company whose revenue has fallen for five years, is good practice for the revenue side.

17. How should our client grow revenue?

Growth cases reward a structure built from the client's actual levers over a memorized tree. More customers, more per customer, new segments, new geographies. Pick the two branches the case data supports and go deep instead of wide.

18. Should our client enter this market?

Market entry hinges on three questions: is the market attractive, can we win it, and does the math work. McKinsey's Diconsa case, on using a store network to bring basic financial services to rural Mexico, is good practice for the same questions. Always end with a go or no-go.

19. Should our client launch this new product?

Product launch cases are market entry plus cannibalization. The new product competes with the client's own line as well as rivals. McKinsey's Electro-Light case, on a beverage company launching a sports drink, is good practice: it asks what to weigh before launching and what market share the drink needs to break even.

20. Should our client acquire this company?

M&A cases turn on standalone value, synergies, and price, in that order. A target can be a great company and a terrible deal at the wrong premium. Ask what else the client could do with the same capital, because that comparison is often what decides the recommendation.

21. Our client's margins trail the industry. Where do the costs hide?

Operations cases reward walking the value chain step by step instead of guessing. Benchmark each major cost line against the industry, find the outlier, then ask whether it's structural or fixable. Never recommend cuts without naming the mechanism that makes them stick.

22. Your friend wants to open a coffee shop. Should she?

Small-business cases test whether your toolkit survives outside the Fortune 500. Bain's official Coffee Shop Co. practice case asks this about a shop in Cambridge, England. Breakeven math carries the day: fixed costs divided by contribution per cup, then a judgment call on foot traffic.

Market Sizing Questions

Sizing shows up inside cases and as standalone questions. State assumptions out loud, round aggressively, and sanity-check the result.

23. How many T-shirts are bought in the US each year?

Population-based sizing starts with about 340 million people and segments from there. Assume shirts per person per year by age band, multiply, done. The interviewer grades the scaffolding, never the final number.

24. Estimate the US smartphone market.

Stock-versus-flow is the trap in device sizing. Installed base and annual purchases are different numbers. Say which one you're sizing, then use replacement cycles (roughly every three years) to bridge between them.

25. How many people in the US play golf?

Penetration questions reward honest segmentation over false precision. Cut by age and income, apply a participation rate per segment, and flag which assumption you'd pressure-test first. That last flag shows the interviewer you know where your estimate is weakest.

26. Estimate the number of dentists working in the US.

Supply-side sizing works backward from demand. People per year per checkup, visits per dentist per day, working days per year. Two paths that converge on the same order of magnitude earn extra credit.

27. Size the US wedding market.

Multi-component sizing tests whether you can keep a structure alive across five minutes of math. Weddings per year times average spend, built from marriage rates. Keep a running tally out loud so the interviewer can follow the thread.

Charts and Pressure Math

28. What do you see in this exhibit?

Chart reads are scored on the "so what," never on description. Say the one insight that changes the client's decision, then the second-order implication. Practice on McKinsey's Solve assessment style: data first, conclusion fast.

29. How many tennis balls fit in an airplane?

Absurd estimates test composure, and composure is the entire point. Volume of cabin over volume of ball, minus seats and packing loss. Smile, structure it, and keep the units straight under pressure.

The Closer

30. What questions do you have for me?

Interviewers remember candidates whose questions prove they listened. Reference something the interviewer said earlier and go one level deeper. Skip anything a careers page could answer, and never ask about hours in a first round.

What About the Questions Not on This List?

Three MBB screens sit outside live interviews. McKinsey runs the Solve assessment, a gamified test whose current core is the Redrock case study. BCG sends most US undergrad applicants its Consulting Career Assessment, with the Casey chatbot case going to a subset afterward. Bain uses an online test that varies by office, covered in our Bain Sova and TestGorilla guide. Written cases also appear in some Bain final rounds. Prep for these separately; none of them replaces live case reps.

Say This, Don't Say That

Why consulting?

Don't say: "I love solving problems and working with smart people."

Say: "I ran a pricing project for my campus coffee co-op that raised margin 9 points, and the diagnosis phase felt like the best class I'd taken. A McKinsey BA I met in March described her casework the same way."

Why this firm?

Don't say: "Bain's culture and people really resonate with me."

Say: "I spoke with a consultant in your Chicago consumer practice in June, and her description of running a store-footprint model as a first-year AC is the ownership I want."

The Summer 2027 cycle is closed; Bain's last window ended August 31, 2026. No MBB firm has opened Summer 2028 internship applications yet, and trackers expect them sometime in 2027. Eligible sophomores can apply now to Bain's BEL and CREW programs, which close November 30, 2026. Book five live mock cases before your first real one. Drill these 30 out loud, in order, and the interview stops being a surprise.