Constructive dismissal can arise when an employer seriously breaches your employment contract, and you resign because of that breach. The employer does not formally dismiss you. Instead, the law may treat your resignation as a dismissal caused by the employer’s conduct.
Resigning is a significant decision because these claims can be difficult to prove. You normally need evidence linking your resignation to a serious contractual breach. Getting employment law advice before leaving can help you understand the risks and available options.
Direct answer: Constructive dismissal happens when an employee resigns because their employer has seriously breached their employment contract. Examples can include unpaid wages, unjustified demotion, unresolved bullying, or unreasonable contractual changes. A successful claim usually requires a fundamental breach, resignation because of that breach, and prompt action.
Constructive dismissal at a glance
| Question | Key point |
|---|---|
| What is it? | Resigning because of a serious employer breach of contract |
| Who can usually claim? | Employees who meet the relevant eligibility requirements |
| Common examples | Unpaid wages, demotion, bullying, unsafe conditions, major contractual changes |
| Must you resign? | Yes, this type of claim involves ending your employment |
| Should you raise a grievance? | Often advisable before resigning, depending on the circumstances |
| Current usual qualifying service | Usually two years for ordinary unfair dismissal claims |
| Current usual tribunal limit | Usually three months minus one day |
| Important upcoming change | Most tribunal limits increase from 1 October 2026 |
| Further change | Unfair dismissal qualifying service falls to six months from 1 January 2027 |
What is constructive dismissal?
Section 95(1)(c) of the Employment Rights Act 1996 covers circumstances where an employee terminates their employment because of employer conduct. The employee must be entitled to terminate the contract without notice because of that conduct. This statutory provision forms the foundation for these claims in Great Britain.
The breach must be sufficiently serious, not a minor workplace disagreement. One major incident can potentially meet that test. Several incidents can also become serious enough when considered together.
An employee must also resign because of the relevant breach. A resignation for unrelated personal reasons may weaken that connection. Waiting too long can also create arguments about whether the employee accepted the employer’s conduct.
Common examples of serious employer breaches
No automatic checklist guarantees a successful claim. Employment tribunals examine the specific employment contract, the employer’s conduct, and the circumstances surrounding the resignation. Still, official guidance identifies several situations that can potentially support a claim.
Unpaid wages or an unauthorised pay cut
Repeatedly withholding agreed wages can create a serious contractual issue. An employer might also reduce contractual pay without securing the employee’s agreement. GOV.UK identifies wage cuts without agreement as a potential example.
The evidence could include payslips, bank statements, contracts, payroll correspondence, and written complaints. Keeping dated records can help establish what happened. They can also show whether the problem continued after you raised it.
Demotion or major changes to your role
An unjustified demotion can potentially constitute a serious breach. Similar concerns may arise when significant responsibilities disappear without agreement. The precise position depends on the contract and surrounding circumstances.
Not every change to someone’s duties will support a claim. Employment contracts sometimes permit reasonable changes within defined limits. The wording of your contract can therefore become important evidence.
Bullying, harassment or discrimination
Serious bullying or harassment can contribute to a potential claim, especially when an employer fails to address complaints. Discrimination can also create separate legal rights under equality legislation. Acas guidance on constructive dismissal specifically identifies bullying and discrimination among situations that may justify resigning and claiming.
These cases can depend heavily on evidence and context. Keep relevant emails, messages, grievance documents, meeting notes, and incident records where lawful. You should also record when you raised concerns and how the employer responded.
Unreasonable changes to working arrangements
An employer might attempt to impose significant changes to working hours or workplace location without agreement. Acas identifies unreasonable changes to working patterns or location as potential examples. GOV.UK gives changing contractual day work to night shifts as another example.
Whether a change breaches your contract depends on your existing terms. A contractual flexibility clause may affect the position. It does not necessarily give an employer unlimited freedom to impose any change.
Unsafe working conditions
Requiring someone to work in dangerous conditions can potentially contribute to a claim. Employees and workers also have specific statutory protections relating to certain serious and imminent workplace dangers. The legal issues can therefore extend beyond dismissal law alone.
Health and safety situations can require urgent action. Record hazards, reports, risk assessments, and responses where possible. Seek professional advice if staying at work could put someone in danger.
What must you prove for constructive dismissal?
A tribunal does not decide the case simply by asking whether your employer behaved unfairly. The central issue concerns whether the employer’s conduct amounted to a sufficiently serious contractual breach. Your resignation must also have been caused by that breach.
In practice, three questions often matter:
- Did your employer seriously breach your employment contract?
- Did you resign because of that breach?
- Did your actions suggest you accepted the breach before resigning?
Evidence becomes especially important because the employee has already resigned. Documents created before resignation can help establish the sequence of events. A clear timeline can also explain why the employer’s conduct ended the employment relationship.
Should you raise a grievance before resigning?
Acas advises employees to consider trying to resolve workplace problems before resigning. You might first raise the issue informally with your manager or employer. You can then raise a formal grievance if informal attempts do not resolve the problem.
A grievance can create a written record of your concerns and give the employer an opportunity to respond. It might also resolve the problem without ending your employment. Starting an internal procedure does not automatically extend an employment tribunal deadline.
In some cases, you may consider resigning immediately if the alleged breach is especially serious. That choice can carry significant legal and financial consequences. Acas recommends obtaining legal advice before resigning where possible.
How long do you need to have worked for your employer?
As of September 2026, an ordinary constructive unfair dismissal claim usually requires two years’ employment. Exceptions apply where no ordinary qualifying period applies. Examples can involve pregnancy, health and safety, whistleblowing, and certain statutory workplace rights.
This area is changing soon. From 1 January 2027, the qualifying period for most unfair dismissal claims falls from two years to six months. The Employment Rights Act 2025 introduced that reform.
Employees with shorter service should not automatically assume they have no legal options. The circumstances might support another claim with different eligibility rules. Discrimination claims, for example, do not require two years of employment.
Constructive dismissal time limits in 2026
Time limits deserve immediate attention because missing them can prevent a tribunal from considering a claim. As of 27 September 2026, the usual limit for most employment tribunal claims remains three months minus one day. The precise starting date depends on the type of claim.
An important change takes effect on 1 October 2026. For relevant time limits starting on or after that date, most claims will have six months minus one day. Acas advises that this change depends on when the applicable time limit starts.
You usually need to notify Acas before making an employment tribunal claim. Timely notification pauses the applicable limitation clock during early conciliation. Calculating the final deadline can be complicated, so avoid relying on rough calendar estimates.
What to do before resigning
A potential claim often depends on decisions made before employment ends. Avoid resigning impulsively after an upsetting meeting or message. First, gather the relevant facts and understand your contractual position.
A practical preparation process can include:
- Read your employment contract and relevant workplace policies.
- Write a dated timeline of the important events.
- Preserve relevant emails, letters, payslips, messages, and meeting notes.
- Raise the issue internally where appropriate.
- Consider submitting a formal written grievance.
- Check your employment status and continuous service.
- Calculate the applicable tribunal deadline.
- Get legal or trade union advice before resigning.
Acas recommends preparing a concise chronology when dealing with workplace disputes. Useful details include important dates and the employer’s explanations. You should also record what you already did to resolve the problem.
What should a resignation letter say?
In these circumstances, a resignation letter should clearly explain why you are leaving. Acas specifically advises explaining your reasons when resigning after a serious contractual breach. This can help document the connection between the employer’s conduct and your decision.
Keep the letter accurate, factual, and consistent with the events you previously raised. Identify the conduct you rely upon and relevant dates where possible. Avoid exaggerating allegations or adding claims you cannot support with evidence.
Whether you should work your contractual notice requires careful consideration. Acas notes that immediate departure might sometimes be justified after a serious breach. Leaving without notice can still create contractual issues, so individual legal advice can be particularly useful.
What happens after you resign?
If you are considering an employment tribunal claim, you will normally need to notify Acas first. Acas can offer early conciliation to explore whether you and your employer can reach an agreement. The conciliator remains impartial and does not decide who should win.
A settlement reached through Acas can be recorded in a legally binding COT3 agreement. If you don’t reach an agreement, Acas can issue an early conciliation certificate. You normally need the certificate number when submitting an ET1 tribunal claim.
Early conciliation does not guarantee settlement or determine the merits of your case. It can provide an opportunity to resolve matters without a tribunal hearing. Legal advice can help you assess evidence, possible claims, losses, and settlement terms.
Frequently asked questions
Can I claim constructive dismissal without two years’ service?
Usually, ordinary constructive unfair dismissal currently requires two years’ service. Certain claims and automatically unfair reasons have different rules. The general unfair dismissal qualifying period changes to six months from 1 January 2027.
Your length of service should therefore be considered alongside the reason you resigned. Discrimination and some statutory protections can operate differently. Seek individual advice before deciding that short service prevents any claim.
Do I need to resign to claim?
Yes, the concept depends on the employee terminating their employment because of the employer’s conduct. If you remain employed, no dismissal has occurred yet. You might still have other workplace rights or possible claims.
Don’t treat resignation as a procedural formality. It can remove your salary and create financial uncertainty. Consider your evidence, alternatives, and legal position before taking that step.
Can one incident be enough?
Yes, a sufficiently serious single incident can potentially support a claim. A series of incidents can also become serious when considered together. The facts and contractual terms determine whether the legal threshold is met.
A workplace dispute does not automatically amount to a fundamental breach. The seriousness and contractual effect of the conduct matter. Evidence of the incident and your response can therefore become important.
Can I stay at work after the breach?
Delay can create difficulties because an employer might argue that you accepted the conduct. That does not mean every short delay automatically destroys a claim. Employees often need time to obtain advice or use an internal grievance procedure.
Timing can become highly fact-specific. Avoid assuming there is a universal safe waiting period. Get advice about your circumstances if resignation is being considered.
Get help before making a final decision
These cases can involve employment contracts, statutory rights, workplace evidence, and strict procedural deadlines. The consequences of resigning can also be immediate because your employment and regular income end. Individual advice can help you understand whether another route could resolve the dispute.
