Unfair Dismissal – Your Rights and Options

Losing your job is stressful enough. If you suspect the dismissal was unfair — whether because your employer had no real reason, handled the process badly, or dismissed you for something they should never have dismissed anyone for — you have legal rights worth understanding quickly. There are strict time limits that can close the door permanently if you miss them.

This guide explains what counts as unfair dismissal, who currently qualifies, how compensation is worked out, and the process you must follow to bring a claim. It also covers the significant changes arriving in January 2027 that will expand these rights considerably.

What Is Unfair Dismissal?

Unfair dismissal is a statutory right — it exists because of legislation, not your contract. It is different from wrongful dismissal, which is a breach of contract claim about how your employment was ended (typically a notice period dispute).

A dismissal can be unfair in two ways:

• No fair reason — your employer cannot show that the reason for dismissal was one of the potentially fair reasons recognised by law
• Unfair process — your employer had a potentially fair reason, but handled the dismissal unreasonably — for example by ignoring the Acas Code of Practice, failing to investigate, or not offering a right of appeal

Both the reason and the process matter. Even a legitimate reason (poor performance, genuine redundancy) can result in an unfair dismissal finding if the employer handled it badly enough.

The Five Potentially Fair Reasons for Dismissal

Employment law recognises five categories of potentially fair reason. Your employer must be able to show their reason fits into one of these:

• Capability or qualifications — you were unable to do the job to the required standard, or lacked a required qualification
• Conduct — your behaviour justified dismissal, from repeated minor misconduct to a single act of gross misconduct
• Redundancy — the requirement for employees to do that kind of work has diminished or ceased
• Illegality — continuing to employ you would break a legal requirement, for example if you lost a driving licence essential to the role
• Some other substantial reason (SOSR) — a catch-all for other genuine business reasons, such as a breakdown in trust and confidence, or a third party's refusal to work with an employee

Even with a valid reason, the tribunal will then consider whether the decision to dismiss, and the process followed, fell within a range of reasonable responses. Employers are given some latitude — the question is not whether the tribunal itself would have dismissed, but whether a reasonable employer could have done so.

Automatically Unfair Dismissals

Some reasons for dismissal are automatically unfair — there is no defence, no reasonableness test, and no qualifying period. These exist because Parliament decided certain characteristics or activities must be absolutely protected from dismissal.

Automatically unfair reasons include dismissal for:

• Making a protected disclosure (whistleblowing)
• Pregnancy, maternity leave, or any other form of family leave
• Asserting a statutory right (such as the right to a written statement of employment, the right to the national minimum wage, or the right to rest breaks)
• Trade union membership, activities, or collective bargaining
• Taking part in official industrial action (this protection now applies at any point — the previous 12-week limit has been removed by the Employment Rights Act 2025)
• Health and safety reasons — for example raising a safety concern, refusing to work in dangerous conditions, or being a health and safety representative
• Acting as an employee representative in redundancy or TUPE consultations
• Being a part-time or fixed-term worker and asserting those rights
• Requesting flexible working or exercising the right to take time off for dependants
• Spent convictions (from 1 January 2027, the qualifying period for this protection is also removed)

For automatically unfair dismissals, the minimum basic award is £9,157 (2026–27) for most categories, and the compensatory award has no cap for whistleblowing and health and safety dismissals — it has never had one.

Who Can Claim? The Qualifying Period

To bring an ordinary unfair dismissal claim, you currently need 2 years' continuous service with the same employer by the date your employment ends. This threshold has been in place since April 2012.

Automatically unfair dismissals have no qualifying period — you can be dismissed on day one for whistleblowing and still bring a claim. Discrimination claims also have no service threshold.

The 3-Month Time Limit — Act Quickly

This is the most important practical point in this guide. You must contact Acas for early conciliation within 3 months minus 1 day of the date your employment ended. Miss this deadline and you almost certainly lose the right to bring a claim — employment tribunals have very limited power to extend it.

The clock starts from the effective date of termination — usually the last day of your notice period, or the date of summary dismissal if you were dismissed without notice. It is not the date you were told, the date a dismissal letter was sent, or the date you found a solicitor.

Do not wait. If you are considering a claim, contact Acas immediately. Time in early conciliation pauses the clock, but you must start early conciliation before the 3-month deadline runs out — not after.

The Employment Rights Act 2025 will extend this to 6 months, but this change is not expected before late 2026 at the earliest. Assume the 3-month limit applies unless you have confirmed otherwise.

The Acas Early Conciliation Process

Before you can submit a claim to an employment tribunal, you must contact Acas and register for early conciliation. This is a mandatory legal requirement — a tribunal will not accept your claim without an Acas early conciliation certificate.

Early conciliation works as follows:

• You notify Acas of your intention to bring a claim — this can be done online or by phone
• Acas contacts your employer to see if both sides are willing to try to resolve the dispute
• If both sides agree, Acas provides a conciliator who helps negotiate a settlement — usually within a period of up to 6 weeks
• If conciliation fails or either side declines, Acas issues an early conciliation certificate — you must include this certificate number when submitting your tribunal claim
• The time spent in early conciliation does not count toward your 3-month deadline — the clock is paused for the period Acas is involved

Most unfair dismissal claims settle during or after early conciliation, without ever reaching a tribunal hearing. For many employees, a negotiated settlement through Acas is the most practical outcome.

How Compensation Is Calculated

If a tribunal finds the dismissal was unfair, it can order reinstatement or re-engagement — but this rarely happens in practice. The usual remedy is compensation, made up of two components.

The Basic Award

The basic award is calculated using the same formula as statutory redundancy pay. It is not linked to your actual financial loss — it recognises your length of service.

Weekly pay is capped at £751 (2026–27) and only the most recent 20 years of service count. The maximum basic award is £22,530. For most automatically unfair dismissal categories, the minimum basic award is £9,157.

The Compensatory Award

The compensatory award covers your actual financial losses caused by the dismissal. A tribunal will assess:

• Immediate loss of earnings — wages lost from dismissal to the tribunal hearing (or to when you found new work)
• Future loss of earnings — if you have not yet found equivalent work, a tribunal will estimate how long it will take you and award losses for that period
• Pay shortfall — if your new job pays less, the shortfall between old and new pay for a reasonable period
• Loss of statutory rights — a small award (usually around £500) for the loss of your 2-year qualifying period, which you will have to rebuild with a new employer
• Pension loss — if your employer contributed to a pension, the loss of those contributions
• Notice pay not received — if your employer did not pay notice pay and you have not already recovered it

The compensatory award is capped at the lower of £123,543 or 52 weeks' gross pay until 31 December 2026. This is why high earners or those with long periods of future loss often find their actual losses exceed what the tribunal can award.

Adjustments to the Award

Both awards can be adjusted before the final figure is reached.

Acas Code uplift: If your employer unreasonably failed to follow the Acas Code of Practice on Disciplinary and Grievance Procedures — for example by not holding a proper disciplinary hearing, not giving you the right to be accompanied, not investigating properly, or not offering a right of appeal — the tribunal can increase the compensatory award by up to 25%. The same adjustment can reduce it by up to 25% if you also failed to follow the Code without good reason.

Polkey reduction: If the tribunal thinks you would probably have been dismissed anyway even with a fair procedure, it will reduce the compensatory award by the percentage chance that a fair process would have led to the same outcome. A tribunal might say there was a 60% chance you would have been dismissed fairly — reducing the compensatory award by 60%.

Contributory fault: If your own conduct contributed to the dismissal, both the basic and compensatory awards can be reduced by whatever percentage the tribunal considers just and equitable. A 25% contributory fault finding reduces both awards by a quarter.

Duty to mitigate: You are expected to take reasonable steps to find new work and reduce your losses. If a tribunal thinks you failed to mitigate — for example by not applying for jobs, turning down reasonable offers, or remaining unemployed longer than necessary — it will reduce the compensatory award accordingly.

The January 2027 Changes — Employment Rights Act 2025

The Employment Rights Act 2025 (which received Royal Assent on 18 December 2025) introduces two major changes to unfair dismissal that take effect on 1 January 2027:

1. Qualifying period reduces from 2 years to 6 months

From 1 January 2027, employees will be protected against ordinary unfair dismissal after just 6 months' continuous service. The change applies immediately to anyone already employed on that date — so any employee with 6 or more months' service on 1 January 2027 gains protection overnight. In practice, this means anyone who started employment before 1 July 2026 will qualify immediately from the start of 2027.

2. Compensatory award cap removed entirely

From 1 January 2027, both the monetary cap (£123,543) and the 52-weeks' pay alternative cap are abolished entirely for dismissals where the effective date of termination is on or after that date. Tribunals will then award compensation based solely on actual financial losses, with no artificial ceiling.

This is a particularly significant change for higher earners or anyone who faces a long period of difficulty finding equivalent work. An employee earning £100,000 who takes 18 months to find equivalent employment would currently be capped at £123,543. After January 2027, a tribunal could potentially award the full calculated loss — subject only to mitigation and other adjustments.

Settlement vs Tribunal — What to Consider

Most unfair dismissal claims never reach a tribunal hearing. They settle — through Acas early conciliation, informal negotiation, or a formal settlement agreement. Settlement has real advantages:

• Certainty — tribunal outcomes are never guaranteed
• Speed — hearings can take 12–18 months to arrive
• Confidentiality — settlements are private; tribunal judgments are public
• Avoiding the stress and time cost of preparing a case

Settlement payments for unfair dismissal claims are typically structured to take advantage of the £30,000 tax-free threshold where possible. If your settlement includes both a compensatory element and PILON (pay in lieu of notice), the PILON is always taxable regardless of how the payment is labelled — see the Settlement Agreements guide for details.

Deciding whether to settle or pursue a tribunal claim depends on the strength of your case, how much the employer has offered, your financial position, and your appetite for the process. These are judgments worth making with an employment solicitor or with support from Acas.

How to Bring a Claim — Step by Step

1. Act immediately — identify your effective date of termination and count forward 3 months minus 1 day. That is your Acas notification deadline.
2. Contact Acas — register for early conciliation at acas.org.uk or by calling 0300 123 1100. This pauses your time limit.
3. Early conciliation — Acas contacts your employer. If both sides engage, a conciliator helps negotiate. If no agreement is reached, Acas issues a certificate.
4. Submit a tribunal claim — if conciliation fails, submit your ET1 claim form at employment tribunals service online, including your Acas certificate number. There is no fee for submitting a claim.
5. Preliminary hearing — in many cases, a preliminary hearing addresses whether you are eligible to claim before the substantive hearing on the merits.
6. Final hearing — the tribunal hears evidence from both sides, makes a finding on whether the dismissal was unfair, and if so, what compensation is appropriate.

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Frequently Asked Questions

Can I claim unfair dismissal if I resigned?

Yes — if you were forced to resign because your employer's conduct made it impossible to stay, this is called constructive dismissal and is treated as an unfair dismissal claim. You must still meet the 2-year qualifying period (currently) and the same time limits apply. Constructive dismissal claims are harder to win because you must show the employer committed a fundamental breach of contract — this is a high bar and worth taking advice on before resigning.

What if my employer says the dismissal was a redundancy?

Redundancy is a potentially fair reason for dismissal, but it must be a genuine redundancy and the process must be fair. If the redundancy was not genuine — for example if your role was quickly filled, or if the selection process was rigged — you may have an unfair dismissal claim. If the redundancy was genuine but the process was unfair (no proper consultation, unfair selection criteria, failure to consider alternatives), a tribunal can still find the dismissal unfair.

Does unfair dismissal affect a reference?

Your employer is not legally required to give you a reference, and if they do it only needs to be accurate — not positive. A finding of unfair dismissal at tribunal does not legally prevent a bad reference, though the terms of any settlement agreement usually include agreed reference wording. If a reference is misleading and causes you loss, that may give rise to a separate negligent misstatement claim.

What if I was dismissed during a probationary period?

Currently, employees in a probationary period usually lack the 2-year qualifying period needed for an ordinary unfair dismissal claim, unless the probation extended beyond 2 years. From 1 January 2027, any employee who has 6 months' service — including those still on probation — will have ordinary unfair dismissal rights. Automatically unfair dismissal and discrimination protections apply from day one regardless.

Summary

• You currently need 2 years' service for ordinary unfair dismissal — this falls to 6 months from 1 January 2027
• Some dismissals are automatically unfair with no qualifying period — including whistleblowing, pregnancy, and asserting statutory rights
• You must contact Acas for early conciliation within 3 months minus 1 day of dismissal — this is strict and missing it almost always kills the claim
• Compensation has two parts: the basic award (max £22,530, using the redundancy formula) and the compensatory award (capped at £123,543 or 52 weeks' pay until 31 Dec 2026)
• The compensatory award cap is removed entirely from 1 January 2027
• Acas uplift, Polkey, contributory fault and mitigation all affect the final figure — use the Unfair Dismissal Estimator → to model your position