Unfair Dismissal UK: Your Complete Guide to Rights and Claims

What is Unfair Dismissal?

Unfair dismissal is when an employer terminates your employment for a reason that is not potentially fair or without following a reasonable procedure.

In UK employment law, under section 98 of the Employment Rights Act 1996, a dismissal is unfair unless the employer proves it was for a potentially fair reason such as conduct, capability, redundancy, or some other substantial reason, and that they acted reasonably in treating that as grounds for dismissal. Tribunals assess both the reason and the fairness of the process used.

For example, if you received no warning about performance issues and were suddenly dismissed without a chance to improve, this could be unfair even if capability was the reason. The ACAS Code of Practice on disciplinary and grievance procedures sets the standard for fairness, which tribunals consider.

Do You Qualify for an Unfair Dismissal Claim?

You generally need two years' continuous service to claim ordinary unfair dismissal, but no qualifying period applies for automatically unfair dismissals.

Section 108 of the Employment Rights Act 1996 requires most employees to have at least two years' continuous employment to bring an ordinary unfair dismissal claim. Continuity is broken only by certain gaps, like more than a week between contracts unless related to sickness or maternity.

However, if your dismissal is automatically unfair, such as for asserting a statutory right, you can claim regardless of service length. This protects vulnerable employees from day one.

Check your service by reviewing payslips, contracts, and P45/P60 forms to confirm continuity.

Automatically Unfair Dismissal Reasons

Certain reasons make dismissal automatically unfair with no qualifying period, including whistleblowing, pregnancy, and union activities.

Under sections like 99, 100, 103, and 103A of the Employment Rights Act 1996, dismissals for reasons such as pregnancy or maternity leave, health and safety concerns, making protected disclosures (whistleblowing), or trade union activities are automatically unfair. The employer cannot justify them, regardless of procedure.

For instance, if you raised concerns about unsafe working conditions and were dismissed shortly after, this could be automatically unfair under section 100. Tribunals presume unfairness if the timing links to the protected act.

These claims often lead to higher minimum basic awards and no Polkey reduction for procedural flaws.

• Whistleblowing (s103A)
• Pregnancy/maternity (s99)
• Health and safety (s100)
• Union membership/activities (s152 TULRCA)

Time Limits for Unfair Dismissal Claims

You must claim within three months less one day from your effective date of termination, but ACAS early conciliation extends this period.

Section 111 of the Employment Rights Act 1996 sets the time limit at three months less one day from the effective date of termination (EDT), which is usually the last day of employment or notice expiry. Late claims are barred unless 'not reasonably practicable' to file on time.

ACAS early conciliation pauses the clock: starting EC adds up to one month, and if it continues, up to 14 more days after the standard limit. Obtain your EC certificate to submit with your tribunal form.

For example, if dismissed on 1 January, your limit is 31 March without EC; with full EC, it could extend to mid-May.

How to Make an Unfair Dismissal Claim

Begin with ACAS early conciliation, then submit form ET1 to the employment tribunal with supporting details.

Contact ACAS for early conciliation within the time limit; they notify your employer and try to resolve amicably. If unsuccessful, get your certificate and file ET1 online via GOV.UK within the extended limit.

Include details of your employment, dismissal circumstances, reasons why unfair, and desired outcome like compensation or reinstatement. No fee applies.

Tribunals aim for early case management to set timelines for evidence exchange.

1. 1. Calculate EDT and time limit.
2. 2. Notify ACAS for early conciliation.
3. 3. Receive EC certificate.
4. 4. Complete and submit ET1 form.
5. 5. Prepare for preliminary hearing.

Remedies if You Win an Unfair Dismissal Case

Successful claims can result in reinstatement, re-engagement, or compensation comprising a basic award and capped compensatory award.

Under sections 112-124 of the Employment Rights Act 1996, tribunals first consider reinstatement or re-engagement from the original or similar job. If not ordered or impracticable, compensation follows.

The basic award mirrors redundancy pay: 1.5 weeks' pay per year for age 41+, etc., capped at 20 years and £700 weekly pay (2024 figures). Compensatory award covers losses like earnings shortfall, up to £115,115 or 52 weeks' pay.

Adjustments apply for contributory conduct, failure to mitigate, or Polkey reductions. Vento bands may apply if discrimination overlaps.

Gathering Evidence for Your Tribunal Claim

Strong evidence like emails, witness statements, and performance records proves unfairness and builds your case.

Collect contracts, dismissal letters, grievance responses, and contemporaneous notes of meetings. Witness statements from colleagues can corroborate procedural flaws.

Follow ACAS Code: lack of investigation, no warnings, or biased hearings weaken employer defences. Highlight any automatically unfair elements.

Organise evidence chronologically for your bundle, limited to 1,000 pages typically.

• Emails and letters
• Meeting notes
• Payslips for losses
• Witness contacts