Graduate jobs · 5 min read
What happens at an assessment centre?
How a UK graduate assessment centre works: the group exercise, case study, in-tray and interview, what assessors score and how to prepare in a week.
The short answer
An assessment centre is a half or full day, in person or online, where an employer runs several exercises with a group of candidates and scores each person against the same set of competencies. The usual mix is a group discussion, a short presentation or case study, a written or in-tray task, and a one-to-one interview. You're not competing against the others in the room; several people, or everyone, can pass. Assessors score what they see you do, so the way to prepare is to practise behaviours, not polish answers.
Key takeaways
- You're scored against criteria, not ranked against the room. In a strong group everyone can be hired.
- Each exercise maps to competencies: the group task tests collaboration and influence, the case tests analysis, the in-tray tests judgement under time.
- In group exercises the highest scorers are the ones who bring others in and move the task forward, not the loudest.
- Ask what the exercises are in advance; most employers tell you, and the ones that don't will tell you the competencies.
On this pageWhat a typical day looks like
What a typical day looks like
| Exercise | What you do | What's scored |
|---|---|---|
| Welcome and icebreaker | Introductions, overview of the day | Usually nothing; relax |
| Group exercise | Six to eight of you solve a problem or reach a decision in 30 to 45 minutes | Collaboration, influence, listening, structure |
| Case study or presentation | Read a brief, recommend an action, present for five to ten minutes | Analysis, judgement, communication |
| In-tray or e-tray | Prioritise a pile of emails and tasks against a clock | Prioritisation, decision-making, written clarity |
| Interview | Competency or strengths questions, 30 to 45 minutes | Evidence of the same competencies, motivation |
| Lunch or networking | Informal time with recent graduates | Usually not scored, but be sensible |
How scoring works
Before the day, the employer defines five to eight competencies, such as analysis, teamwork, communication and commercial awareness, and decides which exercise tests which. During each exercise an assessor watches two or three candidates and notes what they do and say against those criteria. Afterwards the assessors meet, compare notes and agree a score per competency per person. Offers go to everyone above the bar. That's why a quiet candidate who structured the group's time can outscore a confident one who talked over people.
Preparing in a week
- Email the recruiter and ask what the exercises are and which competencies they assess. Most will tell you.
- Write one short example for each competency from study, work or life, using the STAR shape.
- Do one timed case study from the employer's sector: read a page of information, make a recommendation, say it aloud in five minutes.
- Practise a group discussion with friends, with one person watching for who brought others in.
- Read the firm's last annual report summary or recent news, so commercial awareness has something to stand on.
What loses marks
Dominating the group. Staying silent for the first ten minutes. Presenting information without a recommendation. Running out of time in the in-tray because you read everything before deciding anything. Treating the lunch as off the record. And answering interview questions with opinions where the assessor needed a specific example.
Illustrative example: the person who kept time
Eight candidates are asked to agree which of five community projects a company should fund. One candidate proposes spending ten minutes on criteria before discussing projects, asks the two quiet members what they'd weigh, and at the 25-minute mark says they need to converge. He speaks for perhaps a fifth of the time. Assessors score him highest in the group for influence and collaboration, because every intervention changed what the group did.
What happens to the gaps
Applying shows you what employers want that you can't show yet: a must-have your CV doesn't mention, or a question you couldn't answer well. Hand the job from OffLadder CV to Laddie, our AI coach, and it turns each one into three steps:
- Learn the skill: a short lesson on what the post asks for, starting from the basics.
- Try the work: a 15-minute task taken from the job itself, so you have a real example to talk about.
- Practise the interview: a five-question mock interview for that role, weighted to the parts you're least sure of.
The conversation stays in your OffLadder account. Once you've done the work, add it to your CV in your own words, and the next post you tailor for can point to it.
Questions people ask
- What percentage of people pass an assessment centre?
- It varies by employer, but a third to a half of attendees receiving an offer is common, and some firms hire everyone who meets the bar. By the time you're invited you've already passed the stages that reject most applicants. Treat the day as a chance to show what you can do rather than a lottery.
- What should I wear to an assessment centre?
- Whatever the invitation says, and if it says nothing, one notch smarter than the firm's everyday dress. For a bank or law firm that means a suit. For a tech company or charity, smart and plain. Online, dress the same from the waist up and check your background.
- How do I do well in the group exercise?
- Speak early with something structural, such as suggesting how to use the time. Bring in anyone who hasn't spoken. Build on others' points by name. Keep an eye on the clock and say so at the halfway mark. Don't try to lead if someone else is doing it well; supporting visibly scores the same competency.
- Are online assessment centres different?
- The exercises are the same, run over video with breakout rooms for group work. Turn-taking is harder, so signal before you speak, use the chat for structure, and keep your camera on throughout. Test your connection and the platform the day before.
Exercises are practice, not evidence of career fit or a qualification. How to read our guides and report a correction.
Sources
- Assessment centres · Prospects
- Civil Service Fast Stream: how to apply · Civil Service, GOV.UK
- Student Recruitment Survey 2025 · Institute of Student Employers
How this page is written
Sources support the factual background, not a guarantee that an exercise predicts career fit. Fictional practice material is labelled. Dates record content updates; no independent expert review is implied. More about OffLadder.