Behavioural · UK 2026
How to answer "Tell me about a time you failed"
Interviewers also phrase it as:
- "Describe a mistake you made"
- "Tell me about a time things went wrong"
- "When did you last fail?"
Why interviewers ask
Tests self-awareness, accountability, and growth orientation. The most-failed behavioural question because candidates either (a) refuse to name a real failure or (b) name a failure without ownership or learning. Strong answers name a real failure, take ownership without blame-shifting, and explain what you changed afterwards. Weak answers blame circumstances, name 'failures' that are actually successes, or skip the learning step.
Model answer
About [timeframe] ago at [company], I was responsible for [specific decision or project]. I made the call to [specific decision] because [reasoning at the time]. The outcome was [specific bad outcome — quantified if possible]. Looking back, the mistake was [specific judgement error — own it]. What I did afterwards was [specific corrective action]. The lasting change in how I work is [behaviour you've changed since]. I still think about it occasionally because [it influenced how you approach similar situations now].
What to avoid (common bad answer)
I failed when my team's project missed its deadline because the developers couldn't keep up with the timeline. We learned that we need better resource planning. (Blame-shifting to others, vague learning.) Or: My biggest failure is that I sometimes work too hard on details. (That's not a failure — that's a humblebrag.) Or: I haven't really had a major failure in my career. (Lack of self-awareness — disqualifying.) All three fail.
Structure of a good answer
- 1 A real, specific failure with a concrete outcome
- 2 Ownership — your decision, your judgement error, not the teams
- 3 Honest reflection on what the mistake was
- 4 Specific corrective action you took
- 5 Lasting behaviour change since
Common mistakes
- ✗ Disguising a success as a failure ('I worked too hard')
- ✗ Blame-shifting to team, manager, or circumstances
- ✗ Picking a failure too small to be credible
- ✗ No ownership — describing the failure as something that happened to you
- ✗ No learning — flags failure without growth
Recruiter pro tip
Prepare one real failure story before any interview. The candidates who land this question well have rehearsed a specific 90-second story where they fully own a real mistake. The candidates who fail this question are improvising and end up either (a) blame-shifting or (b) disguising. Pre-rehearsal is non-negotiable.
FAQ
How recent should the failure be? ▼
Within the last 2-3 years usually. Older failures suggest you haven't grown recently; brand-new failures might be too raw to discuss professionally.
How big should the failure be? ▼
Real but not catastrophic. A missed milestone or wrong technical call is fine; the time you got someone fired or lost a major customer is too much.
Should I mention the failure on my CV too? ▼
No. CVs show successes; interviews show self-awareness. Different surfaces, different content.
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- → UK Career Change walkthrough 2026 — sector-switch playbook
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