Constructive vs unfair dismissal
One is when the employer fires you. The other is when you resign because your employer's conduct left you no choice. Learn which claim applies to you.
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Should I resign before or after filing an employment tribunal claim?
If you’re planning a constructive dismissal claim, file the claim first and then resign if you wish. Resigning before filing risks the tribunal questioning whether you were truly forced to resign.
What if my employer improves the situation before I resign?
If you resign after the employer has remedied the breach, the tribunal may find you affirmed the contract and waived your claim. If the remedy is incomplete or not credible, you may still be able to claim. Take advice before deciding.
What is the ‘last straw’ doctrine?
Constructive dismissal often involves a series of breaches; you resign in response to a final ‘last straw’. The tribunal looks at whether the last straw connects to earlier breaches — if it’s wholly unrelated, the doctrine may not apply.
Does the wording of my resignation letter matter?
Yes. Citing specific reasons (such as bullying or unilateral pay cuts) supports the claim. Vague or ‘personal reasons’ wording weakens it. Resign in writing, stick to factual reasons, and keep a copy.
Can I bring both an unfair dismissal and constructive dismissal claim?
You can plead both, but you can’t succeed on both — either the employer dismissed you or you resigned in response to a repudiatory breach. The tribunal decides which actually happened on the evidence.
Is resigning without notice the same as constructive dismissal?
No. Resigning without notice is just a resignation unless you can show the employer committed a repudiatory breach that forced it. The legal test requires both a breach and causation.
Employment Law Guide
Constructive vs unfair dismissal
Last updated: April 2026 · Content reviewed against current UK employment law
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The distinction between unfair dismissal and constructive dismissal is crucial, and it comes down to who ended the employment relationship:
. They may do so openly ('you are dismissed'), or constructively (forcing you out through conduct). For a claim of unfair dismissal, you must have 2 years of service, and the employer must have no fair reason for dismissal, or breached fair procedure.
Constructive dismissal
employer's conduct is so bad that you resign
. In law, your resignation is treated as a dismissal because your employer left you no reasonable choice. The key word is "forced" — if you resign, but you resigned voluntarily (you just preferred another job), it is not constructive dismissal.
Constructive dismissal is a
of unfair dismissal. Both require 2 years of service, and both are assessed by employment tribunals. But the legal tests are different, and the evidence required is different.
The constructive dismissal test
To succeed in a constructive dismissal claim, you must prove three things:
1. Repudiatory breach of contract
Your employer must have breached a fundamental term of your contract — not just any term, but a term that goes to the heart of the employment relationship. This is often the
implied term of mutual trust and confidence
: the employer's conduct must be such that it is calculated to destroy, or has destroyed, the relationship of trust and confidence between you and them.
2. Resignation in response to the breach
You must have resigned as a result of the breach. This means the breach must have caused your resignation, not some other reason. If you resign and later discover a breach that existed, you cannot retrospectively claim constructive dismissal.
3. No delay (affirmation)
You must not have delayed unreasonably in resigning. If you discover the breach and continue working for weeks or months, the tribunal may find that you have accepted the breach and lost your right to claim constructive dismissal. This is called "affirmation" of the contract. Resign promptly — ideally in writing, citing the breaches.
The test is high — constructive dismissal is one of the hardest claims to win in employment law because the claimant (you) bears the burden of proving the breach. In contrast, for ordinary unfair dismissal, the employer bears the burden of proving they had a fair reason.
What counts as a repudiatory breach?
Not every breach of contract is a "repudiatory" breach (a breach that goes to the heart of the contract). Here are common examples that the tribunal recognizes as repudiatory:
Reducing your salary without consent or contractual right to do so is a repudiatory breach. Example: "Your pay is now £10,000 less per year, no negotiation."
Demotion or change of role
Fundamentally changing your role without consent (e.g., demoting you from manager to junior staff) can be a repudiatory breach.
Bullying and harassment
Persistent bullying, discrimination, or harassment that undermines the relationship of trust and confidence is a classic repudiatory breach.
Unreasonable change of working location
If you are contracted to work in London and the employer unilaterally requires you to work in Manchester, with no discussion, this can be a repudiatory breach.
Persistent failure to address grievances
If you raise concerns (e.g., safety issues, discriminatory treatment) and the employer ignores them or refuses to investigate, this breaches the duty of care and trust.
Removing you from your role/responsibilities
If the employer removes you from your substantive duties without cause or justification (e.g., you are a team lead and suddenly told to sit in a back office with no role), this is a repudiatory breach.
Isolating you from the team
Deliberately excluding you from team meetings, communications, or social interaction (sometimes called "silent dismissal" or "ostracism") breaches the trust term.
The unifying theme: the employer's conduct must be such that a reasonable employee would feel unable to continue working for that employer. If you can point to a specific action or pattern of conduct, document it carefully.
The risks of constructive dismissal
Constructive dismissal is the hardest claim to win
- High burden on claimant:
- You must prove the breach; the employer does not have to prove they had a fair reason (as they must in unfair dismissal).
- If you lose, you are unprotected:
- If the tribunal finds that your employer did not commit a repudiatory breach, your resignation is treated as a voluntary resignation. You have no unfair dismissal claim, no wrongful dismissal claim, and no remedy. You are simply unemployed.
- Evidence requirements are strict:
- You must show that the breach was the reason for your resignation, not just one of several reasons. If the tribunal believes you resigned partly for other reasons (e.g., you had already found another job), they may find constructive dismissal fails.
- The "last straw" doctrine is technical:
- If there was a series of breaches over time, the final breach (the last straw) must relate to and be informed by the earlier breaches. If it is a completely different issue, it may not support a constructive dismissal claim.
do not resign lightly
. Before resigning, gather evidence of the breaches, raise a formal grievance, and seek legal advice. The decision to resign is irreversible — once you resign, you cannot un-ring the bell.
DO NOT resign without taking advice.
If you are thinking of resigning because your employer's conduct is intolerable, consider these alternatives first:
- Document everything.
- Keep a detailed record of the conduct: dates, times, what was said, who was present, and how it affected you. This is your evidence.
- Send a formal grievance to your employer detailing the breaches. This gives them the opportunity to remedy the situation, and it also protects you — it shows the tribunal that you gave the employer a chance to fix things.
- Seek legal advice before resigning.
- A solicitor can assess whether you have a constructive dismissal claim, and advise on the risks. They may advise you to resign, or they may advise you to continue working while you pursue other remedies.
- Consider whether you can remain employed.
- If you can stomach staying (perhaps with a protective order, or while you search for another job), this avoids the risk of losing a constructive dismissal claim. You can file a tribunal claim while still employed, and settle later.
If you resign without documenting the breaches or raising a grievance first, the tribunal may be skeptical of your claim. Why did you resign without raising the issue with your employer? Your silence may be interpreted as acceptance.
Only resign if you have genuinely exhausted other options, the breach is objectively serious, and you have sound evidence.
Side-by-Side Comparison
| Feature | Unfair Dismissal | Constructive Dismissal |
|---|---|---|
| Who terminates | Employer terminates employment | Employee resigns, but employer's conduct forced it |
| Legal test | Did employer have fair reason and follow fair process? | Was there a repudiatory breach of contract? Did employee resign promptly? |
| Qualifying period | 2 years | 2 years (same) |
| Difficulty | Moderate — employer must justify | Harder — employee must prove repudiatory breach |
| Grievance first | Not required but good practice | Strongly advisable before resigning |
| Notice | Usually dismissed with or without notice | Employee usually serves notice or resigns without |
| Common examples | Capability, conduct, redundancy | Bullying, pay cuts, change of role, isolation |
| Success rate | Higher — employer bears burden | Lower — claimant bears burden of repudiatory breach |
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