What is Unfair Dismissal
If you believe you have been unfairly dismissed, the most important question is simple:
Was your employer legally justified in ending your employment?
Unfair dismissal occurs when an employer dismisses an employee without a fair reason or without following a proper process under UK employment law.
This guide explains what unfair dismissal is, your rights, and exactly what to do next.
What counts as unfair dismissal in the UK
In unfair dismissal UK law, there are only five potentially fair reasons for dismissal:
- Conduct (for example, misconduct at work)
- Capability (performance or ill health)
- Redundancy
- Legal reasons (such as losing the right to work)
- Some other substantial reason
If your employer cannot clearly justify your dismissal using one of these, you may have been unfairly sacked.
However, even if a reason is valid, the process must still be fair.

Quick answer: what is unfair dismissal
You may have an unfair dismissal claim if:
- You were dismissed without a valid reason
- Your employer did not follow a fair procedure
- You were treated inconsistently compared to others
- The decision to dismiss you was unreasonable
Under employment law unfair dismissal rules, employers must act fairly, reasonably, and lawfully when ending employment.
Unfair dismissal: process matters
A dismissal can still be unfair if your employer:
- Failed to investigate properly
- Did not follow disciplinary procedures
- Denied you the chance to respond
- Did not offer an appeal
This is where many unfair dismissal claims succeed.
In simple terms:
A fair reason + unfair process = still potentially unfair dismissal
Real-world example
A worker is dismissed for alleged misconduct.
However:
- No formal investigation took place
- No meeting was held
- No evidence was shared
- No appeal was offered
Even if misconduct occurred, this could still qualify as unfair work dismissal due to a flawed process.
Automatically unfair dismissal
Some dismissals are considered automatically unfair, regardless of process or length of service.
Examples include dismissal for:
- Raising health and safety concerns
- Reporting wrongdoing (whistleblowing)
- Pregnancy or maternity reasons
- Requesting legal workplace rights
In these cases, you may be able to bring an unfair dismissal tribunal claim without the usual two-year service requirement.
Do you need two years’ service
In most cases, you must have worked continuously for at least two years to make an unfair dismissal claim.
However, exceptions apply in cases of automatic unfair dismissal.
If you are unsure, it is critical to assess your situation properly before taking action.
What to do if you have been Unfairly Dismissed
If you believe you have been unfairly dismissed, act quickly. Time limits are strict.
Step 1: Check your dismissal reason
Request a written explanation if you have not received one.
Step 2: Review the process
Ask yourself:
- Were you invited to meetings?
- Were you given a chance to respond?
- Was evidence shared?
Step 3: Raise an appeal
Most employers must offer an appeal process. Use it.
Step 4: Seek guidance early
Understanding your position early can significantly strengthen your case.
Step 5: Consider a tribunal
If unresolved, you may proceed to an unfair dismissal tribunal.
You typically have 3 months less one day from your dismissal date to start the process.
Outcomes of an unfair dismissal claim
If your claim succeeds, outcomes may include:
- Compensation
- Reinstatement (getting your job back)
- Re-engagement in a similar role
However, each case depends on evidence, process, and circumstances.
Common reasons for unfair dismissal claims
Workers commonly bring claims for:
- Being dismissed without warning
- Inconsistent treatment compared to colleagues
- Lack of investigation
- Bias or predetermined outcomes
- Being dismissed for raising concerns
Understanding the reasons for unfair dismissal is key to identifying whether your situation qualifies.
Final guidance for UK workers
If you believe you have been unfairly dismissed, do not delay.
The difference between a successful and unsuccessful claim often comes down to:
- Acting quickly
- Understanding your rights
- Presenting clear facts
At The Workers Union, the focus is on helping you understand your position clearly and take the right next step based on your situation.
Frequently Asked Questions
It means being dismissed without a fair reason or without a fair process.
Yes, if you meet eligibility criteria and act within time limits.
It is a legal process where your case is reviewed independently to determine if your dismissal was fair.
Emails, meeting notes, contracts, and timelines can all support your case.



