Most UK finance processes — spring weeks, summer internships, graduate schemes — end in an assessment centre (AC): a half-day or full day combining a group exercise, a case study or written exercise, and interviews. Candidates who cleared every online test and video interview routinely fail here, usually for behavioural reasons they never saw coming. Here is what each stage is actually measuring.
The group exercise — the stage that fails the most people
A team of 4-8 candidates gets a brief (allocate a budget, pick an investment, recommend a strategy) and 30-45 minutes to reach a group recommendation while assessors watch. The trap: it looks like a debate to win. It is not. Assessors are scoring collaboration — do you build on others' points, bring quiet people in, keep the group on time, move it toward a decision?
- Dominating scores worse than contributing selectively. The candidate who talks most is usually not the one who passes.
- The highest-value behaviours are structural: proposing a framework early ("shall we spend 10 minutes on criteria, then score the options?"), timekeeping, and synthesising ("so we agree on X, the open question is Y").
- Disagreement is fine — done once, with reasons, gracefully conceded if the group goes the other way.
- If you notice someone hasn't spoken, inviting them in ("what's your read, [name]?") is the single most reliably scored positive behaviour.
The case study
Individually or in pairs: a short pack on a company or decision, 30-60 minutes to prepare, then present a recommendation and take questions. The bar is structure, not brilliance: a clear recommendation up front, two or three supporting reasons with numbers from the pack, risks acknowledged, and composure in the Q&A. Candidates fail by burying the recommendation at the end, ignoring the numbers provided, or crumbling on the first challenge — assessors often push back on purpose to test exactly that.
The written exercise and e-tray
Some ACs include a written exercise (summarise a pack, draft a client email) or an e-tray/inbox exercise (prioritise and respond to a flood of emails against the clock). Both test triage and clarity under time pressure — the actual day-one job. Write short, front-load the answer, and visibly prioritise: doing 70% of the items well beats attempting all of them badly.
The interviews within the AC
Expect a competency/fit interview (STAR-format stories: teamwork, failure, leadership, resilience) and often a technical or motivation interview. By AC stage your story and "why this firm" should be polished — see our dedicated guides on both. The AC-specific point: interviewers compare notes with the group-exercise assessors, so consistency matters. The candidate who was collaborative in the exercise and then claims "I always take charge" in the interview creates a flag either way.
Practical points that quietly matter
- Energy management: it is a long day and assessors see everything, including how you behave at lunch and between exercises. Friendly and professional throughout — other candidates are colleagues, not competition, in the assessors' eyes.
- Names: learn your group members' names in the first minutes and use them — it powers the inclusion behaviours that score.
- Numbers: bring a calculator mindset; most ACs include arithmetic somewhere and the candidates who reach for structure ("that's roughly 15% of the budget") stand out.
- The firms are also selling to you: good questions asked at the end of each stage get noticed.
Frequently asked questions
What are assessors actually looking for in the group exercise?
Collaboration behaviours: building on others' points, structuring the discussion, timekeeping, bringing quiet members in, and moving the group to a decision. Dominating the conversation scores worse than contributing selectively and enabling the team.
How do I prepare for an assessment centre case study?
Practise a fixed structure: recommendation first, two or three numbered reasons using data from the pack, risks acknowledged, then invite questions. Time-box preparation so you always leave minutes to organise your delivery.
Do I compete against the other candidates at my AC?
Not directly — firms can and do pass multiple candidates from one AC, or none. Treating other candidates as teammates rather than rivals is itself part of what is being assessed.
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