Competency Based Interview Questions: A Practical UK Question Bank
What competency based interviews are actually testing
A competency based interview is structured around a set of behaviours the employer has decided matter for the role. Every question maps to one of those behaviours. The interviewer is not interested in what you would do in theory — they want a real example of what you did. [3]
That is why vague answers fail. Saying 'I'm a great communicator' tells the interviewer nothing. Saying 'In my last role, I had to present a budget overrun to a sceptical board with 48 hours' notice' gives them something to probe.
These questions are also called behavioural interview questions, and the terms are used interchangeably in UK hiring. The format is the same: past situation, your specific actions, measurable outcome.
Use the STAR method to structure every answer [1]:
- Situation — set the scene briefly. One or two sentences.
- Task — what was your specific responsibility?
- Action — what did you do, step by step? This is the longest part.
- Result — what happened? Quantify if you can. What did you learn?
How to build a strong STAR answer
Most candidates spend too long on Situation and not enough on Action. The interviewer already knows the world has problems — they want to see how you solved yours. Keep Situation and Task brief, and let Action do the work.
A few rules that separate good answers from forgettable ones:
- Use 'I', not 'we'. The panel is assessing you, not your team. [3]
- Be specific. Name the project, the deadline, the number of people involved.
- Quantify results where you can — time saved, money recovered, satisfaction scores, percentage improvements.
- Prepare follow-up answers. Interviewers will probe: 'What would you do differently?' or 'How did your manager react?'
- Keep the whole answer to two to three minutes when spoken aloud. [2]
Before the interview, write out six to eight strong examples from your experience. Each example can cover multiple competencies if you frame it correctly. Think of this as your story bank. [3]
For a full walkthrough of the method with worked examples, see STAR method examples: how to answer behavioural interview questions.
10 competency based interview questions — with guidance on each
Tell me about a time you led a team through a difficult situation.
What they're checking: Tests leadership, decision-making under pressure, and how you bring others with you when things are hard.
Open with the context in one sentence. Explain why the situation was genuinely difficult — a tight deadline, conflicting priorities, low morale. Focus your Action section on the specific steps you took to lead: how you communicated, how you allocated work, how you kept people motivated. Close with a result that shows the team succeeded and what you personally learned about leading.
Describe a time you had to influence someone who disagreed with you.
What they're checking: Tests communication, persuasion, and emotional intelligence. Employers want to know you can get things done without authority.
Choose an example where the disagreement was real and the stakes mattered. In your Action, explain how you listened first, then built your case — data, logic, or finding common ground. Avoid examples where you simply overruled someone. The result should show the person came round and the outcome was better for it.
Give me an example of when you managed a project from start to finish.
What they're checking: Tests planning, organisation, prioritisation, and delivery. Common in graduate, project management, and operations roles.
Briefly describe the project scope and your ownership of it. In Action, walk through how you planned, tracked progress, managed risks, and handled problems. Result should cover whether you delivered on time, on budget, or to quality — and what you would do differently next time.
Tell me about a time you dealt with a difficult colleague or stakeholder.
What they're checking: Tests interpersonal skills, conflict resolution, and professionalism under social pressure.
Pick an example where you stayed constructive. Avoid anything that makes you sound like you complained or escalated immediately. Show that you tried to understand their perspective first. Result should demonstrate the relationship improved or the work got done despite the tension.
Describe a situation where you had to adapt quickly to a significant change.
What they're checking: Tests resilience, flexibility, and a positive attitude to uncertainty — increasingly valued in fast-moving organisations.
The change should be real and disruptive — a restructure, a system change, a sudden shift in priorities. In Action, explain how you processed the change, adjusted your approach, and helped others if relevant. Result should show you delivered despite the disruption and ideally that you embraced what the change made possible.
Give me an example of when you identified a problem before it became serious.
What they're checking: Tests initiative, analytical thinking, and commercial awareness. Employers want people who spot risks early, not just react to crises.
Explain how you noticed the issue — what data, signal, or instinct alerted you. Then describe what you did about it before being asked. Result should show the impact of your early action: a crisis avoided, money saved, a client retained.
Tell me about a time you had to meet a tight deadline under pressure.
What they're checking: Tests time management, prioritisation, and performance under stress. Almost universal in competency frameworks.
Be specific about the deadline and why it mattered. In Action, explain how you prioritised, what you cut or delegated, and how you kept quality up. Avoid examples where you simply worked longer hours — show smart thinking, not just effort. Result should confirm you delivered and what you learned about working under pressure.
Describe a time you used data or analysis to make a decision.
What they're checking: Tests analytical thinking and evidence-based reasoning. Common in finance, operations, marketing, and increasingly in all professional roles.
Explain the decision you faced and why it was not obvious. Describe the data you gathered or analysed, how you interpreted it, and what conclusion you reached. Result should show the decision worked out — and ideally that it was better than the gut-feel alternative would have been.
Give me an example of when you went above and beyond for a customer or client.
What they're checking: Tests customer focus, initiative, and ownership. Relevant in any client-facing or service role.
Choose a situation where the standard response would have been insufficient. Show that you chose to do more because you cared about the outcome, not because you were told to. Result should include the client's reaction and any longer-term benefit — repeat business, a referral, a positive review.
Tell me about a time you failed or made a mistake. What did you do?
What they're checking: Tests self-awareness, honesty, and the ability to learn. Interviewers use this to see whether you can reflect without deflecting blame onto others.
Pick a genuine mistake — not a humble-brag ('I work too hard'). Explain what went wrong and own your part in it clearly. Then spend most of your time on what you did to fix it and what you changed afterwards. Result should show growth, not just recovery.
Describe a time you had to communicate complex information to a non-expert audience.
What they're checking: Tests communication skills, empathy, and the ability to translate technical knowledge into plain language.
Explain who the audience was and why the complexity mattered. In Action, describe how you chose your format, language, and level of detail. Did you use visuals? Did you check for understanding? Result should show the audience understood and acted on the information correctly.
Competency based interview answers examples: a worked STAR story
Reading a framework is one thing. Seeing it applied is more useful. Here is a worked example using the leadership question above, based on the National Careers Service's STAR guidance. [1]
Leadership under pressure — worked STAR answer
- Situation
- I was a team leader at a digital marketing agency. Three weeks before a major client campaign launch, our senior copywriter resigned unexpectedly, leaving a significant gap in the team.
- Task
- My responsibility was to ensure the campaign launched on time and to the quality the client expected, without the resource we had planned around.
- Action
- I immediately mapped every outstanding task against the remaining team's skills and capacity. I redistributed work based on strengths rather than job titles, briefed the client honestly about the situation, and negotiated a two-day extension on one deliverable to protect quality. I ran a short daily check-in each morning to catch blockers early and kept morale up by being transparent about progress.
- Result
- The campaign launched on time for the core deliverables. The client renewed their contract for the following year. I learned that early, honest communication with clients builds more trust than pretending everything is fine.
Notice that 'I' is used throughout the Action section. The team's effort is acknowledged in the Result, but the interviewer can clearly see what this candidate did personally.
A short preparation plan for competency based interview answers
Preparation is the difference between a confident answer and a rambling one. Use this plan in the week before your interview.
- Read the job description carefully. Underline every skill and behaviour mentioned. These are the competencies you will be tested on. [2]
- Build your story bank. Write out six to eight examples from your career — or education, volunteering, or part-time work if you are early in your career. Each should have a clear Situation, Task, Action, and Result. [1]
- Map stories to competencies. Check which examples cover which competencies. A good story can cover two or three. Fill any gaps.
- Practise out loud. Reading notes is not the same as speaking. Practise with a friend, record yourself, or use a structured mock interview tool. Aim for two to three minutes per answer.
- Prepare follow-up answers. For each story, think about: What would you do differently? What did you learn? How did others react?
- Research the organisation. Competency questions often have a commercial or cultural angle. Knowing the employer's priorities helps you choose the most relevant examples. [2]
The Interview Coach gives you 8 role-specific questions, STAR feedback on your answers, and a model answer for each. One session is free with an account — useful for practising before the real thing.
If you are preparing for a Civil Service interview, the competency framework there uses specific behaviours with defined levels. See our Civil Service behaviours examples for worked answers at each grade.
Common mistakes to avoid
- Talking about 'we' throughout. The panel cannot assess what the team did. Use 'I' and be specific about your contribution. [3]
- Choosing a vague or hypothetical example. 'I would usually...' is not a competency answer. You need a specific past event.
- Spending too long on context. If your Situation takes more than 30 seconds, you are eating into the time you need for Action and Result.
- Forgetting the result. Many candidates trail off after describing their actions. Always close with what happened and what you learned.
- Preparing only one example per competency. If the interviewer says 'Can you give me another example?', you need a second story ready.
- Memorising a script. Rehearsed answers sound flat and fall apart under follow-up questions. Know your stories, not a word-for-word script. [2]
For more on structuring your preparation, see the interview prep hub and our full guide to the STAR method interview.
Frequently asked questions
What are competency based interview questions?
Competency based interview questions ask you to describe a specific past situation to demonstrate a skill or behaviour. They follow a structured format and are designed to show how you actually behaved, not how you think you would behave. Employers use them because evidence shows past behaviour is a reliable indicator of future performance. [3]
What is the STAR method and how do I use it?
STAR stands for Situation, Task, Action, Result. You briefly set the scene, explain your specific responsibility, describe the steps you took, and close with the outcome. It is the standard framework for answering competency based interview questions in the UK. Keep Action as the longest section — that is what the interviewer is assessing. [1]
How many examples should I prepare?
Prepare six to eight strong examples before any competency based interview. Each example should be specific, real, and have a clear result. A good story can cover more than one competency if you frame it correctly. Having multiple examples also means you are ready if an interviewer asks for a second one on the same theme. [3]
Can I use examples from outside work?
Yes. University projects, volunteering, sport, caring responsibilities, and part-time work all count, especially if you are early in your career or changing direction. What matters is that the example is real, specific, and clearly demonstrates the competency being tested. Focus on your individual actions and the outcome you achieved. [1]
What are the most common competencies tested?
Most UK employers test a core set: communication, teamwork, leadership, problem-solving, resilience, planning and organisation, commercial awareness, and customer focus. The job description will usually signal which matter most for a specific role. Map your story bank to those competencies before the interview. [3]
What is the biggest mistake people make in competency based interviews?
The most common mistake is talking about what 'we' did rather than what 'you' did. Interviewers are assessing your individual contribution, not your team's. Use 'I' throughout your Action section and be precise about the steps you personally took. Vague, team-based answers are the fastest way to score poorly on a competency framework. [3]
Related guides
- STAR Method Examples: How to Answer Behavioural Interview Questions
Eight worked STAR method examples for UK interviews — entry, mid and senior level. See what good looks like and the mistakes that cost candidates the job.
- STAR Method Interview: A Complete Practical Guide
Master the STAR method interview technique with step-by-step guidance, UK examples, a mistakes table and a preparation checklist you can use today.