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JL JobLabs

Behavioural · UK 2026

How to answer "Tell me about a time you missed a deadline"

Alex By Alex · 12-year UK recruiter · Updated April 2026

Interviewers also phrase it as:

  • "When have you not delivered on time?"
  • "Tell me about a project that ran over"
  • "Describe a delivery that slipped"

Why interviewers ask

Tests delivery discipline, communication during slippage, and accountability. Interviewers want to know whether you spot risk early, communicate proactively, and learn from slippage — or whether you over-promise and miss without warning. Strong answers describe a specific miss, the early signal you saw (or missed), how you communicated, and what you changed afterwards.

Model answer

About [timeframe] ago I committed to [specific deliverable] by [specific date]. The signal that I was going to miss came at [specific time before the deadline]. I [specific actions: communicated to manager + stakeholders, replanned, descoped if appropriate]. I missed the deadline by [specific gap], delivering on [date]. What I changed afterwards was [specific behavioural or operational change]. The lesson was [self-aware reflection].

What to avoid (common bad answer)

I had a project that ran over but it wasn't really my fault — there were external dependencies. (Blame-shifting — flags lack of accountability.) Or: I've never really missed a deadline. (Almost certainly false; flags self-awareness gap.) Both fail.

Structure of a good answer

  • 1 Specific deliverable with specific deadline
  • 2 Early signal you spotted (or missed) of risk
  • 3 Specific communication actions to manager and stakeholders
  • 4 Honest gap: how much you missed by
  • 5 Specific behavioural change since

Common mistakes

  • ✗ Claiming you've never missed a deadline — disqualifying
  • ✗ Blame-shifting to dependencies, team, or circumstances
  • ✗ Failing to surface the slippage early — flags poor communication
  • ✗ Over-elaborate explanation that hides the gap
  • ✗ No specific change since — flags absence of learning

Recruiter pro tip

The strongest answers I've heard surface the slippage early — usually the candidate flagged risk to their manager 2-4 weeks before the actual deadline. That proactive communication is what separates senior delivery from junior delivery. Hiring managers don't punish slippage that was communicated early; they punish surprises.

FAQ

How big should the missed deadline be? ▼

Real but recoverable. A 1-week miss on a 4-week project is fine; a 6-month miss on a 3-month project flags poor planning.

What if the miss was genuinely caused by external factors? ▼

Acknowledge them but own the response: 'The dependencies slipped, but my mistake was not building enough buffer for that risk.' Always pull the accountability back to you.

Should I mention I learned to over-estimate timelines? ▼

Carefully — sometimes valid, but can flag risk-aversion. 'I now build explicit risk buffer into my estimates' is better framing.

Related interview questions

"Tell me about a time you failed"

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"How do you handle stress and pressure?"

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"Tell me about a challenge you overcame"

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Browse all 48UK interview answer guides

Tell me about yourselfWhy do you want this role?Why this company?What's your greatest strength?What's your greatest weakness?Why are you leaving your current role?What are your salary expectations?Where do you see yourself in 5 years?Why should we hire you?Tell me about a challenge you overcameTell me about a time you failedHow do you handle conflict at work?What motivates you?What questions do you have for us?What makes you a strong candidate?How do you handle stress and pressure?How do you prioritise your tasks?Tell me about a time you led a teamWhat's your management style?How do you handle feedback?Tell me about a time you disagreed with your managerWhy are there gaps in your CV?Tell me about a time you went above and beyondWhat's your biggest achievement?Describe your ideal work environmentTell me about yourself (recent graduate version)How would your colleagues describe you?Tell me about a time you handled ambiguityWhy now? (why are you looking now)How do you handle criticism?Describe yourself in three wordsTell me about a time you took initiativeHow do you handle deadlines?What do you know about our company?Why this industry?Tell me about a time you had to adapt to changeHow do you stay organised?Tell me about a time you influenced without authorityWhat's your dream job?How do you deal with difficult people at work?How do you define success?Tell me about a time you met a tight deadlineHow do you handle pressure?Tell me about a time you disagreed with a decisionWhat would your previous manager say about you?How do you stay current in your field?Tell me about a time you helped someone at work