Unfair Dismissal: Do I Have a Claim?

What is unfair dismissal?

Unfair dismissal is a statutory right under the Employment Rights Act 1996. It means your employer dismissed you, but either had no valid reason, or did not follow a fair process in carrying out the dismissal. The right to claim unfair dismissal is one of the most important protections in UK employment law.

The standard qualifying period: 2 years

For a standard unfair dismissal claim, you must have been continuously employed for at least 2 years by the date of dismissal. If you have less than 2 years' service, you generally cannot bring an unfair dismissal claim — unless one of the automatic unfair dismissal exceptions applies (see below).

Note: The Employment Rights Act 2025 contains provisions that may reduce or eliminate the qualifying period in future — check for updates as secondary legislation is introduced.

Automatic unfair dismissal — no qualifying period required

Some reasons for dismissal are automatically unfair regardless of how long you have worked for the employer. These include:

• Pregnancy or maternity leave
• Whistleblowing (making a protected disclosure)
• Trade union membership or activities
• Assertion of a statutory right (e.g. claiming the national minimum wage)
• Health and safety activities (e.g. raising safety concerns)
• Part-time or fixed-term status
• TUPE transfer (being dismissed for a reason connected to a business transfer)
• Making a flexible working request

If your dismissal falls into any of these categories, the 2-year qualifying period does not apply, and compensation is uncapped (for whistleblowing and some others).

What counts as a fair reason for dismissal?

Even with the right to dismiss, your employer must have one of the following fair reasons under section 98 ERA 1996:

• Capability — inability to do the job (including ill health)
• Conduct — misconduct or gross misconduct
• Redundancy — genuine redundancy situation
• Illegality — e.g. a driver losing their licence
• Some other substantial reason (SOSR) — a catch-all for other valid business reasons

Having a potentially fair reason is not enough — the employer must also act reasonably in treating that reason as sufficient to dismiss, and must follow a fair procedure.

What is a fair procedure?

The ACAS Code of Practice on Disciplinary and Grievance Procedures sets out what a fair process looks like. Key elements include:

• A proper investigation before any disciplinary action
• Written notice of the allegations
• A disciplinary hearing with the right to be accompanied
• An opportunity to state your case
• A written decision with reasons
• A right of appeal

Failure to follow this process can make an otherwise potentially fair dismissal into an unfair one — and tribunals can uplift awards by up to 25% if the employer unreasonably failed to follow the code.

What compensation could I receive?

An unfair dismissal award has two components:

Basic award

Calculated using the same formula as statutory redundancy pay: based on age, years of service and weekly pay (capped at £643/week). Maximum basic award is currently around £21,862.

Compensatory award

Compensation for your actual financial losses — lost earnings, future loss of earnings, loss of statutory rights, loss of pension contributions. Currently capped at the lower of one year's gross pay or £115,115. This cap is being removed in January 2027.

What if I was dismissed for discriminatory reasons?

If the real reason for your dismissal involved a protected characteristic (age, race, sex, disability, pregnancy, religion, sexual orientation), you may have discrimination claims in addition to unfair dismissal. Discrimination awards are uncapped and can include injury to feelings. These are some of the most valuable employment law claims.

Gathering evidence for unfair dismissal

The strength of an unfair dismissal claim often comes down to evidence. Tribunals decide cases on the balance of probabilities — meaning whoever presents the more convincing and better-supported account of events is likely to succeed. Gathering evidence early, before it disappears or is deleted, is one of the most important things you can do.

What to collect

• Written communications: Emails, text messages, WhatsApp messages, letters, memos — anything that records what was said, when, and by whom. Screenshot messages on personal devices in case access is revoked.
• HR and disciplinary documents: Invitation letters, outcome letters, appeal decisions, performance improvement plans, written warnings. Request copies of everything in writing.
• Your employment contract and any policies: The disciplinary policy, grievance policy, capability procedure. These set the benchmark against which your employer's conduct is judged.
• Payslips and P60s: To evidence your earnings for the compensatory award calculation.
• Attendance records: If the dismissal involved absence, sickness records and occupational health reports are key.
• Witness details: Names and contact details of colleagues who witnessed relevant events. You cannot compel them to provide statements, but knowing who was present is valuable.
• A contemporaneous diary: A personal log of events — dated, factual, including what was said by whom and who was present. Written at the time, it carries evidential weight.

How to preserve it

Do not rely on employer systems remaining accessible. Once you are dismissed (or even put on gardening leave), your email access may be cut off. Download or screenshot everything relevant before that happens. Store copies in a personal (not work) email account or cloud storage.

Data subject access requests

Under the UK GDPR, you have the right to request all personal data your employer holds about you — this is a Subject Access Request (SAR). Employers must respond within one calendar month. A SAR can reveal internal emails about you, notes from meetings, HR file entries, and communications between managers that might not otherwise be disclosed. It is a powerful tool — particularly in cases involving capability management, disciplinary proceedings, or restructures where the real reason for dismissal may differ from the stated reason. Submit a SAR as soon as you suspect dismissal is coming.

The Polkey deduction — what it means for your compensation

Even if a tribunal finds that you were unfairly dismissed, your compensation may still be reduced. One of the most significant ways this happens is through what is known as a Polkey deduction, named after the House of Lords case Polkey v AE Dayton Services Ltd [1987].

The principle is this: if your employer had a potentially fair reason for dismissing you (say, genuine redundancy or capability), but failed to follow a fair procedure, the tribunal must ask — what would have happened if the employer had followed a fair procedure? If the answer is "you would probably have been dismissed anyway, just a bit later," the tribunal will reduce the compensatory award to reflect that.

How the deduction works in practice

The deduction is expressed as a percentage. If the tribunal concludes there was a 60% chance you would have been dismissed anyway even with a fair process, it reduces your compensatory award by 60%. In some cases, the deduction can be as high as 100% — leaving you with only the basic award. Examples of situations where large Polkey deductions are common:

• Genuine redundancy where a fair selection pool would almost certainly have still resulted in your selection
• Serious capability issues where performance was genuinely poor and a fair process would have reached the same outcome
• Misconduct cases where the employee was guilty of the conduct, even if the procedure was flawed

Contribution reduction

Separate from Polkey, a tribunal can also reduce compensation where the employee's own conduct contributed to the dismissal. If you were partly to blame — for example, your conduct was genuinely problematic even if the dismissal was procedurally unfair — the tribunal may reduce both the basic and compensatory award by a "just and equitable" percentage.

Reinstatement and re-engagement

Most people assume that winning an unfair dismissal case means receiving a financial payment and moving on. But the Employment Rights Act 1996 actually provides two other possible remedies: reinstatement and re-engagement.

Reinstatement

Reinstatement means being returned to your old job, as if the dismissal never happened. You would be entitled to all the benefits, seniority, and back pay you would have received had you not been dismissed. This is the most complete remedy available in employment law.

Re-engagement

Re-engagement means being given a different but comparable role with the same employer (or an associated employer), on terms as favourable as before. It does not restore you to your exact previous position, but gets you back into employment with the same organisation.

When tribunals order reinstatement or re-engagement

Tribunals are required to consider these remedies first, before compensation. In practice, however, they are extremely rare — accounting for fewer than 1% of successful unfair dismissal cases. Reasons for this include:

• Most claimants do not want to return to a workplace where they were unfairly treated
• If the relationship has broken down irretrievably, the tribunal will find it impractical to order return
• If the employer has taken on replacement staff, reinstatement may be impossible
• An employer can argue it is not practicable to comply, and the tribunal may accept this

If a tribunal does order reinstatement or re-engagement and the employer refuses to comply, the tribunal cannot physically force them — but it can award an additional award of between 26 and 52 weeks' pay on top of the compensatory award as a penalty for non-compliance.