Unfair Dismissal in the United Kingdom
Reviewed by the Commoner Law Editorial Team. Sourced from UK Acts of Parliament, statutory instruments, and official guidance. Written in plain language for general understanding — this is educational content, not legal advice. Our editorial standards
What is this right?
Unfair dismissal is the workhorse claim of UK employment law. To bring it, you usually need two years of continuous service — a threshold that has flipped between one and two years across successive governments. Once you have it, your employer can only dismiss you for one of five 'potentially fair' reasons set out in section 98 of the Employment Rights Act 1996:
- Capability or qualifications — you genuinely can't do the job
- Conduct — you've breached workplace rules
- Redundancy — the role itself is going
- Legal restriction — continuing to employ you would break the law (e.g. you've lost the right to work in the UK)
- Some other substantial reason (SOSR) — the catch-all for genuine business reasons that don't fit the other four
Even with a fair reason on paper, the dismissal can still be unfair if the employer botched the process. Tribunals expect a meeting, a chance to put your side, and a right of appeal — the ACAS Code of Practice on Discipline and Grievance is the benchmark, and breaching it can add up to 25% to your compensation.
When does it apply?
- You've worked continuously for the same employer for 2 years or more.
- No qualifying period for automatically unfair reasons: pregnancy, whistleblowing, trade union activity, asserting a statutory right, jury service, refusing to work in unsafe conditions. These bite from day one.
- Only employees can bring an unfair dismissal claim — workers and self-employed contractors are out (though they may have other routes).
- Dismissed in your first two years? You may still have a wrongful dismissal claim (breach of contract — for unpaid notice) or a discrimination claim under the Equality Act 2010, both of which have no qualifying period.
What to Do If You Have Been Unfairly Dismissed by a UK Employer
The clock starts running the day your employment ends, and it runs out fast.
- Move quickly. You have 3 months minus 1 day from your last day to start ACAS Early Conciliation. Miss it and the tribunal will refuse jurisdiction in all but the rarest cases.
- You must notify ACAS Early Conciliation before issuing a tribunal claim. Call 0300 123 1100 or apply online — it's free and pauses the clock. The early conciliation window is 12 weeks (extended from 6 weeks by SI 2025/1153, in force from 1 December 2025).
- Pull together your evidence now: contract, payslips, the dismissal letter, emails, notes of any meetings, and the names of anyone who was there.
- If ACAS can't broker a settlement, you file an ET1 with the Employment Tribunal. There's no fee — fees were quashed by the Supreme Court in R (UNISON) v Lord Chancellor in 2017.
- Remedies are reinstatement, re-engagement, or compensation: a basic award (up to £22,530) plus a compensatory award (up to £123,543 or 52 weeks' pay, whichever is lower). The week's pay used in the basic award is capped at £751. Figures apply where the effective date of termination is on or after 6 April 2026.
What should you NOT do?
- Don't resign in the heat of a row. Quitting closes off ordinary unfair dismissal — though if conditions were genuinely intolerable you may have a constructive unfair dismissal claim, which is harder to prove.
- Don't blow the deadline. Tribunals very rarely extend it. The 3-month bar is one of the strictest in English law.
- Don't assume short service means no rights. Automatically unfair grounds and discrimination both kick in from day one.
Use the jurisdiction bar at the top of the page to pick your region — you'll see how devolved laws differ from UK national protections.
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Common Questions
When does unfair dismissal apply?
You've worked continuously for the same employer for 2 years or more.No qualifying period for automatically unfair reasons: pregnancy, whistleblowing, trade union activity, asserting a statutory right, jury service, refusing to work in unsafe conditions. These bite from day one.Only employees can bring an unfair dismissal claim — workers and self-employed contractors are out (though they may have other routes).Dismissed in your first two years? You may still have a wrongful dismissal claim (breach of contract — for unpaid notice) or a discrimination claim under the Equality Act 2010, both of w...
What should I do if I think my UK employer fired me unfairly?
The clock starts running the day your employment ends, and it runs out fast.Move quickly. You have 3 months minus 1 day from your last day to start ACAS Early Conciliation. Miss it and the tribunal will refuse jurisdiction in all but the rarest cases.You must notify ACAS Early Conciliation before issuing a tribunal claim. Call 0300 123 1100 or apply online — it's free and pauses the clock. The early conciliation window is 12 weeks (extended from 6 weeks by SI 2025/1153, in force from 1 December 2025).Pull together your evidence now: contract, payslips, the dismissal letter, emails, notes of an...
What mistakes should I avoid with unfair dismissal?
Don't resign in the heat of a row. Quitting closes off ordinary unfair dismissal — though if conditions were genuinely intolerable you may have a constructive unfair dismissal claim, which is harder to prove.Don't blow the deadline. Tribunals very rarely extend it. The 3-month bar is one of the strictest in English law.Don't assume short service means no rights. Automatically unfair grounds and discrimination both kick in from day one.