What is constructive dismissal? A complete guide

What does constructive dismissal mean?

Constructive dismissal arises where an employee resigns in response to a serious breach of contract by their employer. The legal basis is section 95(1)(c) of the Employment Rights Act 1996, which treats an employee as dismissed if they resign, with or without notice, in circumstances where the employer’s conduct entitled them to leave. Because the law counts it as a dismissal, the employee can claim unfair dismissal despite having resigned.

The test is a contract test, not a fairness test. It comes from the leading case of Western Excavating (ECC) Ltd v Sharp [1978] ICR 221, in which the Court of Appeal held that an employee can only resign and claim constructive dismissal if the employer is guilty of conduct that goes to the root of the contract, not merely conduct the employee considers unreasonable. That distinction is the reason so many claims fail.

What counts as a fundamental breach?

A fundamental (or repudiatory) breach is one serious enough to show that the employer no longer intends to be bound by an essential term of the contract. It can be a single serious act or an anticipatory breach, where the employer makes clear it will not honour the contract. Common examples include:

• a unilateral cut in pay, or failure to pay wages;
• an unjustified demotion, or a significant change to duties, status or place of work imposed without agreement;
• bullying, harassment or discrimination that the employer fails to address;
• failing to provide a safe working environment, or to deal properly with a grievance;
• unfounded or heavy-handed disciplinary action.

Many of these breach the implied term of mutual trust and confidence, which the courts imply into every employment contract. A breach of that term is treated as fundamental, so conduct that seriously damages the relationship of trust between employer and employee will usually qualify. These are the kinds of conduct that make up the grounds for a constructive dismissal claim.

What is the ‘last straw’ doctrine?

A fundamental breach does not have to be a single dramatic event. Under the ‘last straw’ doctrine, a series of lesser acts can cumulatively destroy trust and confidence, with a final act, the last straw, tipping the balance. The last straw need not itself be serious or even blameworthy, but the courts have made clear it cannot be entirely trivial or innocuous. The Court of Appeal in Kaur v Leeds Teaching Hospitals NHS Trust [2018] EWCA Civ 978 set out a helpful series of questions for judging last-straw resignations, including whether the employee had already affirmed the contract before the final act.

Do I have to resign to claim constructive dismissal?

Yes. Constructive dismissal requires you to actually resign in response to the breach, and this is where the risk lies. You must not delay: if you carry on working for too long after the breach without protest, the law may treat you as having ‘affirmed’ the contract and given up the right to resign and claim. Equally, you must resign because of the breach, not for an unconnected reason such as a better job offer.

Because resignation cuts off your income and is difficult to undo, it should never be done in the heat of the moment. In most cases it is wise to raise a formal grievance first, to give the employer a chance to put things right and to create a clear record, and to take advice before handing in your notice.

Taking advice before resigning can make the difference between winning and losing a claim for constructive dismissal before an Employment Tribunal. Successful constructive dismissal claims depend to a large extent on timing as well as how an employer has acted in the run-up to any resignation. I had a recent case where encouragement to bide time and later resign in response to a significant breach equated to a lucrative and successful outcome for the client concerned. The biggest mistake prospective Claimants tend to make is mistiming their resignation.

How do you prove constructive dismissal?

To succeed at an employment tribunal, an employee generally has to establish four things: that there was a fundamental breach of contract by the employer; that the breach caused the resignation; that they resigned in response to it (and reasonably promptly); and that they did not affirm the contract by delaying. Evidence matters enormously, so contemporaneous records, emails, a clear grievance and a resignation letter that sets out the real reasons for leaving can all make the difference.

Is constructive dismissal the same as unfair dismissal?

They are closely linked but not identical. Constructive dismissal is about how the employment ended: you resigned because of the employer’s breach. Unfair dismissal is the claim you then bring. Establishing that you were constructively dismissed does not automatically make the dismissal unfair, but in practice an employer who has committed a fundamental breach will rarely be able to show a fair reason and process, so most constructive dismissals are also unfair.

To bring an ordinary unfair dismissal claim you currently need at least two years’ continuous service, and there is a strict time limit: three months less one day from the date your employment ends (rising to six months from October 2026). You must also notify Acas and go through early conciliation first, which pauses the clock. These requirements are changing, as set out below.

What compensation can you get?

If a constructive unfair dismissal claim succeeds, the compensation, or payout, usually has two parts: a basic award, calculated like statutory redundancy pay from your age, length of service and weekly pay; and a compensatory award for financial losses, mainly lost earnings, subject to your duty to look for new work. The compensatory award is currently capped at the lower of a year’s gross pay or a statutory maximum of just over £118,000 (the cap does not apply to certain claims such as discrimination, and is due to be removed from January 2027). Reinstatement is possible in principle but rare.

How to claim constructive dismissal

The usual route to claim constructive dismissal is: raise a formal grievance and give the employer a chance to resolve the issue; take legal advice before deciding whether to resign; if you do resign, do so promptly and set out your reasons; notify Acas to begin early conciliation within the time limit; and, if the matter is not resolved, submit your tribunal claim (form ET1) within the deadline. Given how easily claims fail on timing or affirmation, advice at the outset is invaluable.

How long does a constructive dismissal case take?

There is no fixed timetable. Many cases settle within a few months, often through Acas early conciliation or a negotiated settlement agreement, without ever reaching a hearing. Where a claim goes all the way to a final employment tribunal hearing, it commonly takes twelve to eighteen months or longer, as tribunals are working through significant backlogs. The complexity of the case, the tribunal’s workload and whether the parties are willing to negotiate all affect the timing, which is one reason many people prefer to resolve matters by agreement rather than litigate to the end.

Fully utilising available internal grievance processes before resigning, to give employers an opportunity to correct course, can, where employers fail to correct or change course, place prospective Claimant’s in the strongest negotiating position and lead to the best financial outcomes.

What is changing: Labour, Andy Burnham and the Employment Rights Act 2025

Dismissal law is undergoing its biggest reform in a generation, and it is being driven by politics. The Employment Rights Act 2025 is the centrepiece of Labour’s ‘Plan to Make Work Pay’, which the government has called the biggest upgrade to workers’ rights in a generation. Under it, the qualifying period for ordinary unfair dismissal is set to fall from two years to six months, expected to take effect on 1 January 2027, making it far easier for employees, including those claiming constructive dismissal, to bring a claim relatively early in a job.

At the same time, the statutory caps on the unfair dismissal compensatory award are due to be abolished, which could significantly increase the value of successful claims, and the time limit for bringing most tribunal claims is set to double, from three months to six months, from October 2026. Taken together, these changes move the balance firmly towards employees.

The direction is unlikely to reverse. Andy Burnham, who became Labour leader in July 2026 and has since taken office as Prime Minister, built his political reputation on workers’ rights, and his reported priorities include stronger protection around pay, zero-hours contracts, trade union rights and sick pay. None of the further reform is settled, and employment decisions should never be planned around speculation, but the clear direction of travel is towards greater protection for employees, and greater risk for employers who mishandle a departure. For anyone weighing up a constructive dismissal claim, or any employer managing a difficult exit, that makes early, up-to-date advice more important than ever.

Take advice before you take action

Constructive dismissal is high-risk and fact-sensitive, and the law is changing fast. Whether you are an employee weighing up whether to resign or a senior executive negotiating an exit, early advice is the best protection. Our Employment team at Payne Hicks Beach advises both employees and employers on the full range of dismissal and workplace disputes.