Unfair Dismissal Explained
A plain English guide to unfair dismissal in the UK — what it is, who can claim, how compensation works and what happens at tribunal.
Written for employees, HR professionals and anyone trying to understand where they stand. CaseIntel helps you benchmark your situation against more than 54,000 real Employment Tribunal decisions.
What is unfair dismissal?
Unfair dismissal is a statutory right under the Employment Rights Act 1996. In short, an employer must have a fair reason to dismiss an employee and must follow a fair procedure when doing so. If either is missing, the dismissal may be unfair — even where the employer believed they were acting reasonably.
It is different from wrongful dismissal, which is a contractual claim about how a dismissal was carried out (for example, dismissal without proper notice). A dismissal can be lawful in contract terms but still unfair in employment law.
Who can bring an unfair dismissal claim?
Most employees need a minimum period of continuous service with their employer before they can bring an "ordinary" unfair dismissal claim. The traditional rule of thumb is around two years, although this area of law has been the subject of reform proposals, so the position can change over time.
There are also important exceptions. Dismissals connected to certain protected reasons — such as raising health and safety concerns, whistleblowing, asserting a statutory right, pregnancy, or trade union activities — are typically treated as automatically unfair and do not require a minimum length of service.
Fair reasons for dismissal
The law recognises a limited list of potentially fair reasons for dismissal. Having one of these reasons is necessary but, on its own, is not enough — the employer must also act reasonably and follow a fair procedure.
Misconduct
Behaviour falling below what the employer reasonably expects, such as serious breaches of policy or gross misconduct.
Capability
Issues with performance, skills or health that affect the employee's ability to do the job.
Redundancy
A genuine reduction in the need for a particular kind of work, supported by fair selection and consultation.
Statutory restriction
Where continuing employment would break the law — for example, the loss of a required licence.
Some other substantial reason
A 'catch-all' category covering significant business reasons that don't fall within the others.
Reason alone is not enough
Even with a fair reason, the dismissal can still be unfair if the process the employer followed was unreasonable.
When might a dismissal be unfair?
Even where an employer has a potentially fair reason, the dismissal may still be unfair if the process around it falls short. In practice, tribunals often focus closely on how the decision was reached.
- A rushed or superficial investigation
- No proper disciplinary or capability process
- Failing to put allegations clearly to the employee
- Not allowing the right to be accompanied
- Treating similar employees inconsistently
- Failure to consult properly in a redundancy
- Pre-determined outcomes before a hearing
- No genuine right of appeal
What compensation could you receive?
Compensation for unfair dismissal is generally made up of two main elements. Figures change periodically and statutory caps may apply, so the practical value of any award depends heavily on the individual facts.
Basic Award
A statutory calculation broadly based on age, length of service and a capped weekly pay figure. It is similar in structure to a statutory redundancy payment.
Compensatory Award
Intended to reflect actual financial loss flowing from the dismissal — typically lost earnings, pension and benefits, subject to the duty to mitigate and any statutory cap.
Factors that commonly influence the value of a claim
- Length of service and age
- Salary, pension and benefits
- How long the employee remains out of work
- Steps taken to find alternative work (mitigation)
- Conduct of either party during the process
- Whether ACAS Code of Practice was followed
- Any contributory fault
- Whether the claim is automatically unfair
What happens after making a claim?
Most unfair dismissal claims follow a broadly similar journey. Timescales vary significantly depending on the tribunal region and complexity of the case.
- 1ACAS Early Conciliation
Before issuing a claim, most claimants must notify ACAS, who offer a period of free conciliation to see if matters can be resolved without a tribunal.
- 2Submitting the tribunal claim (ET1)
If conciliation does not resolve matters, the claim is submitted on form ET1. Strict time limits apply — typically three months less one day from the dismissal, subject to extensions for ACAS.
- 3Response and case management
The employer responds (ET3) and the tribunal sets a timetable, often with a case management hearing to deal with directions and any preliminary issues.
- 4Disclosure of documents
Both sides exchange relevant documents, usually compiled into an agreed bundle for the hearing.
- 5Witness statements
Each witness produces a written statement setting out their evidence, exchanged before the hearing.
- 6Final hearing
The tribunal hears live evidence, considers the documents and arguments and decides whether the dismissal was unfair and, if so, the appropriate remedy.
A more detailed walkthrough will appear in our Employment Tribunal Timeline guide (coming soon).
Employment Tribunal Statistics
This section will shortly contain original CaseIntel analysis based on our database of more than 54,000 published Employment Tribunal decisions.
Claim success rates
How often unfair dismissal claims succeed by sector, claim type and other factors.
Compensation analysis
Distribution of awards across comparable cases, including medians and typical ranges.
Tribunal timelines
How long cases typically take from claim to final hearing across different regions.
Historical trends
How outcomes and award levels have shifted over time across the tribunal system.
Understanding the law is only part of the picture
Two people with similar-sounding cases can end up in very different places at tribunal. CaseIntel benchmarks your situation against real outcomes so you can make better informed decisions.
Frequently Asked Questions
What's the difference between unfair dismissal and wrongful dismissal?+
Unfair dismissal is a statutory employment right and looks at whether the employer had a fair reason and followed a fair procedure.
Wrongful dismissal is a contractual claim — typically about whether the employer breached the contract, for example by failing to give proper notice. A dismissal can be unfair without being wrongful, and vice versa.
How long do I have to bring an unfair dismissal claim?+
Strict time limits apply. The general rule is that a claim must be started within three months less one day from the effective date of dismissal, subject to the ACAS Early Conciliation extension.
Because the rules are tight and there are limited exceptions, it is important to act quickly if you are thinking about a claim.
Do I need to go to a tribunal hearing?+
Many claims settle before a final hearing — through ACAS Early Conciliation, judicial mediation or direct negotiation.
Where matters cannot be resolved, the case proceeds to a hearing at which the tribunal decides whether the dismissal was unfair.
How is unfair dismissal compensation calculated?+
Compensation is typically made up of a Basic Award (a statutory calculation based on age, length of service and a capped weekly pay) and a Compensatory Award reflecting actual financial loss.
Statutory caps and adjustments often apply, and the duty to mitigate (try to find alternative work) can significantly affect the figure.
Should I accept the settlement offer I've received?+
Whether an offer is reasonable depends on the strength of the claim and how it compares to likely tribunal outcomes for similar cases.
The CaseIntel Settlement Offer Checker benchmarks an offer against comparable tribunal awards so you can see whether it sits below, around or above the typical range.
Can I bring a claim if I have less than two years' service?+
Ordinary unfair dismissal usually requires a minimum period of continuous service. However, certain dismissals — such as those connected to whistleblowing, health and safety or pregnancy — are automatically unfair and do not require a qualifying period.
Eligibility ultimately turns on the specific facts of the dismissal.
Is CaseIntel a law firm?+
No. CaseIntel provides data-driven benchmarking based on publicly available Employment Tribunal decisions.
We do not provide legal advice. You should always consult a qualified employment solicitor before making legal decisions.
See where your case really stands
Check how often claims like yours succeed at tribunal, and benchmark any settlement offer you've received against comparable awards.
This guide is for general information only and is not legal advice. Always consult a qualified employment solicitor before making legal decisions.