How long do I need to work before I can claim unfair dismissal?

Generally you need 2 years' continuous service to bring an ordinary unfair dismissal claim in the employment tribunal. However, some dismissals are 'automatically unfair' from day one — including dismissal for asserting a statutory right, whistleblowing, or discrimination.

What's the time limit to bring an employment tribunal claim?

You have 3 months less one day from the date of dismissal (or the last act of discrimination). You must contact ACAS for Early Conciliation before filing, which pauses the clock. Missing the deadline can bar your claim entirely.

What's the difference between unfair and wrongful dismissal?

Unfair dismissal is a statutory claim (Employment Rights Act 1996) about whether the reason and procedure were fair. Wrongful dismissal is a breach of contract claim — usually about notice pay — and can be brought regardless of length of service.

Unfair dismissal and your employment rights (UK)

Plain-language guide · reviewed for general accuracy · Great Britain

Being sacked is tough, but UK employment law gives you more protection than many people realise. The Employment Rights Act 1996 is the main piece of legislation, and the rules around unfair dismissal, redundancy, and discrimination are worth understanding before you decide what to do next.

1. The 2-year qualifying period

To bring an ordinary unfair dismissal claim, you generally need at least 2 years' continuous service with your employer. If you've been there less than 2 years, the employer can dismiss you without giving a reason — but not for a reason that's automatically unfair or discriminatory. Automatic unfairness (which applies from day one) includes: dismissal for asserting a statutory right (like the minimum wage or rest breaks), whistleblowing, joining a trade union, taking maternity or paternity leave, or health and safety activities.

2. What makes a dismissal unfair?

Under the Employment Rights Act 1996, a dismissal is fair only if the employer can show it was for one of five potentially fair reasons — conduct, capability (performance or ill health), redundancy, breach of a statutory restriction, or "some other substantial reason" — and that they acted reasonably in treating that reason as sufficient grounds for dismissal. The employment tribunal will look at whether the employer followed a fair procedure: did they investigate properly, give you a chance to respond, allow an appeal? The ACAS Code of Practice on disciplinary and grievance procedures sets the standard.

Tip: if you're facing disciplinary action, document everything. Keep copies of emails, meeting notes, and performance reviews. If you eventually bring a claim, contemporaneous records are gold.

3. Constructive dismissal

You don't have to be sacked to claim unfair dismissal. If your employer commits a fundamental breach of contract — such as not paying your wages, demoting you without cause, or allowing bullying and harassment — and you resign in response, that can be a "constructive dismissal." You must resign promptly (delay can be seen as accepting the breach) and you still need 2 years' service for the claim, unless the breach relates to discrimination or automatic unfairness.

4. Redundancy rights

If you're made redundant after 2 years' continuous service, you're entitled to statutory redundancy pay — calculated based on your age, length of service, and weekly pay (capped at £700 per week as of 2026). The employer must follow a fair selection process, consult with you individually (and collectively if 20+ redundancies), and consider suitable alternative employment. A redundancy can still be an unfair dismissal if the process was a sham or you were unfairly selected.

5. Taking your claim to the employment tribunal

You have 3 months less one day from the date of dismissal to start the process. Before you can file a claim, you must contact ACAS (the Advisory, Conciliation and Arbitration Service) for Early Conciliation — a free, confidential attempt to settle the dispute. Early conciliation pauses the 3-month clock. If it doesn't resolve the issue, ACAS issues a certificate and you can file your claim on the employment tribunal website. Compensation for unfair dismissal includes a basic award (similar to statutory redundancy pay) and a compensatory award (capped at the lower of 52 weeks' pay or a statutory maximum — £115,115 as of April 2026).

Common questions

How long before I can claim unfair dismissal?: Generally 2 years' continuous service — but automatically unfair reasons (discrimination, whistleblowing) are protected from day one.
What's the deadline for a tribunal claim?: 3 months less one day from dismissal. You must contact ACAS for Early Conciliation first, which pauses the clock.
Unfair vs wrongful dismissal?: Unfair = statutory claim about the reason and procedure. Wrongful = breach of contract (usually notice pay), no length-of-service requirement.

Every dismissal is different. Tell the assistant how long you worked there, the reason given, and whether you're still employed for a plain-language starting point.

This guide is general information about Great Britain employment law and is not legal advice. Laws differ in Northern Ireland. For your specific situation, contact ACAS, Citizens Advice, or an employment solicitor.