Competency-based interviews are the standard across much of the UK public sector. Rather than asking what you would do in theory, the panel asks for real examples of what you have actually done, then scores each answer against a defined competency or behaviour. The principle is simple: past behaviour is a fairer predictor than hypothetical promises.
You will meet this format when you apply for Civil Service jobs, council roles and many NHS posts. Knowing how the scoring works lets you prepare deliberately instead of hoping the right story comes to mind under pressure.
How to recognise a competency question
Competency questions almost always begin with a prompt for a specific occasion. Listen for openings like these, because they tell you the panel wants a single concrete example.
- Tell us about a time you handled a difficult situation with a colleague
- Give an example of when you had to meet a tight deadline
- Describe an occasion when you improved a process or service
- Tell us about a time you had to make a decision without all the information you wanted
Use the STAR structure
The clearest way to answer is the STAR method: Situation, Task, Action, Result. Set the scene briefly, explain what you personally needed to achieve, spend most of your time on the actions you took, and finish with a measurable or observable result. Our dedicated guide on the STAR method for public-sector interviews walks through full worked examples.
The most common mistake is dwelling on the situation and rushing the action. The panel scores what you did, so that is where your detail should live. Use 'I' rather than 'we', because they are assessing your contribution, not your team's.
Prepare a bank of examples
You cannot predict every question, but you can prepare flexible material. Choose five or six rich examples from work, study or volunteering and learn them well enough to retell from different angles. A single strong example often covers several competencies, such as teamwork, problem-solving and communication, depending on how you frame it.
Match your examples to the framework the employer uses. If the role is graded against the Civil Service behaviours, our collection of behaviour examples shows the kind of evidence that lands well at each level.
During the interview
It is completely acceptable to take a moment before answering. A short pause to choose the right example reads as considered, not hesitant. If you blank, ask to come back to the question later; panels generally allow it. Keep an eye on the time, and if an answer is running long, move to your result and stop.
After the answer
Panels may ask follow-up probes to test whether the example is genuinely yours, such as 'why did you choose that approach?' or 'what would you do differently?'. Welcome these; they are a chance to add depth and show reflection. Honest, specific detail is much harder to fake than a polished but vague story.
This is general information to help you prepare and is not formal careers advice. Always read the specific competencies or behaviours listed in the advert, as these vary by employer and role.