L.E.K. Consulting Assessment Centre Guide 2027
Two rounds of interviews (first round + final round) testing case interview skills and personal experience. 4 interviews across 2 rounds. Everything you need to know to prepare.
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Format
What the L.E.K. Consulting assessment centre looks like
First Round — Case Interview
40-50 minutes1 interviewer (Manager/Principal)
Candidate-led case interview. You receive a business problem and work through analysis, data interpretation, and recommendation.
First Round — Experience Interview
30-40 minutes1 interviewer
Behavioural interview testing leadership, personal impact, or problem-solving. Similar to McKinsey's PEI format. Deep dive into one story for 15-20 minutes.
Final Round — Case Interview
40-50 minutes1 Partner
Harder case with more ambiguity. Partners probe your assumptions and test your ability to think under pressure with incomplete data.
Final Round — Experience Interview
30-40 minutes1 Partner
Deeper experience interview with more senior interviewers. Tests cultural fit, maturity, and self-awareness alongside leadership evidence.
Prep plan
48-hour preparation plan
148 hours before
Practise 3-4 case interviews — focus on structured, hypothesis-driven format.
Prepare 3 anchor stories: leadership, personal impact, and entrepreneurial drive. Each must have quantified outcomes.
Research L.E.K. Consulting's recent work — check their publications, case studies, and industry reports.
Review market sizing frameworks — you may need to estimate a number under pressure.
Prepare your "Why L.E.K. Consulting?" answer with specific references to the firm's culture, methodology, or people.
224 hours before
Do one final practice case — time yourself to ensure you're comfortable within 40 minutes.
Check the Financial Times for any major business news.
Prepare 3-4 questions for partners — about their career, projects, or the firm's strategy.
Plan your outfit and route. Smart business casual or business formal depending on the firm.
Get 8 hours of sleep. Case interviews require sharp mental performance.
3Morning of
Review your anchor stories and case frameworks one final time.
Scan morning headlines — interviewers may reference current events.
Arrive 15 minutes early. Be personable with everyone you meet.
Stay energised between rounds — the quality of your final interview matters as much as your first.
Questions
L.E.K. Consulting assessment centre questions by round
Different interviewers ask different types of questions. Know what to expect at each level.
- 1Why L.E.K.?
- 2Case: estimate the market size for electric scooters in the UK.
- 3Tell me about a time you influenced a decision with data.
- 4Why strategy consulting?
- 5A PE firm wants to buy a UK gym chain. Should they?
Technicals
L.E.K. Consulting technical questions
- 1Case: a healthcare company is losing margin. Diagnose and fix.
- 2How would you assess the attractiveness of entering a new market?
- 3Tell me about a time you led under pressure.
- 4What makes LEK different from McKinsey?
- 5Case: market sizing for UK private tutoring market.
- 6Our client is a PE firm evaluating a £500M acquisition of a UK veterinary clinic chain. How would you structure your approach?
- 7How does L.E.K. Consulting's methodology differ from McKinsey?
- 8Estimate the market size for private veterinary clinics in the UK.
- 9A private equity firm is evaluating an acquisition of a UK healthcare chain. Should they proceed?
- 10What recent L.E.K. Consulting publication or insight have you found interesting and why?
Evaluation
What L.E.K. Consulting interviewers evaluate
Quantitative strength
LEK cases are more data-heavy than MBB. Strong mental maths and numerical reasoning essential.
Structured problem-solving
Candidate-led cases. Build your own framework from first principles.
PE awareness
LEK does significant PE due diligence work. Show interest in private equity.
Intellectual curiosity
They want people who enjoy solving complex problems for the sake of it.
Clear communication
Simplifying complex analysis into actionable recommendations.
Drive
Lean teams, high expectations. Evidence of sustained effort and self-motivation.
Avoid
Common mistakes at L.E.K. Consulting assessment centres
Jumping to conclusions in case interviews without laying out a structure first. Always pause, structure your thinking, then proceed.
Having only one anchor story. Different interviewers test different competencies — prepare at least 3 distinct examples.
Not asking clarifying questions at the start of a case. Good candidates confirm understanding before diving in.
Failing to synthesise at the end. Partners want a clear recommendation, not just analysis. State your answer, then support it.
Being thrown by unexpected case types. Practise market sizing, profitability, market entry, and M&A cases.
Treating the experience interview as less important than the case. It carries equal weight.
Practise L.E.K. Consulting assessment centre questions
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FAQ
L.E.K. Consulting assessment centre FAQs
Be ready for every round
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