How to Answer: “Tell me about a time you failed.”
A complete guide to answering this common interview question — including what interviewers are really looking for, practical tips, and a worked example answer.
What interviewers are really asking
Choose a real failure — interviewers can tell when you're minimising. Show ownership (no blame-shifting), demonstrate what you learned, and show how you applied that learning. Avoid failures that suggest a fundamental character flaw or lack of competence for the role.
Tips
- Choose a genuine failure, not a disguised success.
- Take full ownership — no blaming the team or circumstances.
- Focus on learning and what changed afterwards.
- Keep the failure proportionate — don't choose something catastrophic.
- Show self-awareness throughout.
Example answer
Sample response
“Early in my career I underestimated a migration project by about three weeks. I'd been optimistic about complexity and hadn't consulted the senior engineers who'd worked on that codebase before. We missed the client deadline and had to negotiate a revised timeline. I apologised to the client, presented an honest revised plan, and we delivered. After that I introduced a mandatory review with at least one experienced engineer on any estimate over two weeks. I haven't had a miss of that scale since.”
Adapt this to your own experience — never use any example answer verbatim.
Use the STAR method
Structure your answer as: Situation (brief context), Task (your specific responsibility), Action (what you personally did), Result (the quantified outcome). Most strong interview answers follow this pattern.
Full STAR method guide