Constructive Dismissal UK: Claims & Tribunal Guide

At a glance

• Legal basis: constructive dismissal is defined in section 95(1)(c) of the Employment Rights Act 1996 — resigning in response to your employer's conduct can, in law, count as a dismissal.
• Qualifying service: normally 2 years' continuous employment before you can bring an ordinary constructive unfair dismissal claim (section 108, Employment Rights Act 1996). Some claims — discrimination, whistleblowing, certain health and safety matters — need no minimum service.
• Time limit: normally 3 months less one day from your effective date of termination (section 111, Employment Rights Act 1996). You must start Acas early conciliation first; conciliation can now run for up to 12 weeks (extended from 6 weeks on 1 December 2025) and pauses the clock while it runs.
• Coming change (not yet in force): from 1 October 2026 the tribunal time limit for most claims, including unfair dismissal, is expected to extend to 6 months under the Employment Rights Act 2025 — check GOV.UK before relying on this if your dismissal happens before that date.
• Compensation: a successful claim can bring a basic award plus a compensatory award. For dismissals from 6 April 2026 the compensatory award is capped at £123,543 or 52 weeks' gross pay, whichever is lower (check GOV.UK — this changes every April).
• The Acas Code: an unreasonable failure by either side to follow the Acas Code of Practice on disciplinary and grievance procedures can adjust any tribunal award up or down by up to 25%.
• Notice pay: a separate wrongful dismissal claim for unpaid notice can run alongside your unfair dismissal claim, capped at £25,000 in the tribunal (Employment Tribunals Extension of Jurisdiction (England and Wales) Order 1994) — larger claims can go to the County or High Court instead.

What is constructive dismissal?

Constructive dismissal is a claim an employee can bring when they have resigned because of their employer's behaviour, arguing that the resignation should be treated in law as a dismissal. The legal hook sits in section 95(1)(c) of the Employment Rights Act 1996, which provides that an employee is dismissed where they terminate the contract, with or without notice, in circumstances in which they are entitled to terminate it without notice because of the employer's conduct.

In plain terms, the employer must have done something serious enough to amount to a fundamental breach of the employment contract, sometimes called a repudiatory breach. The employee then has to resign in response to that breach, and without waiting so long that they appear to have accepted the new state of affairs.

Establishing constructive dismissal is only the first hurdle. Even where a tribunal accepts that a constructive dismissal took place, it must go on to decide whether that dismissal was fair or unfair under section 98 of the Employment Rights Act 1996 — the same fairness test used for ordinary dismissals. In practice, an employer relying on a genuine, fundamental breach of contract as the reason for the employee leaving will struggle to show the dismissal was fair, but the two questions (was there a dismissal, and was it fair) are legally distinct.

This guide assumes you are an employee with employee status. Workers and genuinely self-employed contractors do not have the right to claim ordinary unfair dismissal, and agency workers often do not have employee status with their agency or the end-user either — see our guide on agency worker rights if that applies to you.

The legal test for a fundamental breach

The repudiatory breach test

The leading case is Western Excavating (ECC) Ltd v Sharp [1978], in which the Court of Appeal set the test that still applies today: the employer's conduct must amount to a significant breach going to the root of the contract, or show that the employer no longer intends to be bound by one of its essential terms. This is often called the "contract test" — it is not enough that the employer behaved unreasonably; the conduct must actually breach the contract in a serious way.

Most claims rely on the implied term of mutual trust and confidence, which the House of Lords confirmed exists in every contract of employment in Malik v Bank of Credit and Commerce International SA [1997]. Conduct — assessed objectively, without needing to show the employer intended harm — that is calculated or likely to seriously damage or destroy that relationship of trust, without reasonable and proper cause, can amount to a fundamental breach even where no express contractual term is broken.

Acting promptly: affirmation of the contract

Once a fundamental breach has occurred, the employee must resign in response to it and without delay. Continuing to work and accept wages for an extended period after the breach can be treated as affirming the contract — effectively waiving the right to treat it as at an end. There is no fixed number of weeks that is automatically too long; tribunals look at the whole picture, including whether the employee was still investigating, raising a grievance, or seeking advice during the delay. Raising a grievance while reserving your position does not usually amount to affirmation on its own, but the safest course is to act as soon as you reasonably can once you have decided the relationship cannot continue.

Types of employer conduct that can amount to a breach

Common examples

• A significant unilateral cut to pay, hours or benefits without agreement or contractual justification.
• A demotion or a fundamental change to job duties, status or location with no contractual basis.
• Bullying or harassment that management knows about and fails to address.
• Serious or repeated non-payment or late payment of wages.
• A dangerous failure to address health and safety concerns.
• Discriminatory treatment linked to a protected characteristic (which may also found a separate discrimination claim, available from day one — see below).

The "last straw" doctrine

A single act does not have to be the sole cause. In Waltham Forest LBC v Omilaju [2004] EWCA Civ 1493, the Court of Appeal confirmed that a series of smaller incidents can cumulatively amount to a repudiatory breach, with the final incident — the "last straw" — triggering the resignation. Importantly, the last straw does not need to be blameworthy or unreasonable when viewed in isolation, but it must genuinely contribute to the breakdown of trust; an entirely innocuous act that the employee merely resents will not count.

Worked example: Priya's resignation

Priya, a fictional employee, raises a grievance about her manager repeatedly excluding her from team meetings and reallocating her client accounts without explanation. HR investigates but takes no meaningful action. Three months later, her manager cuts her sales commission structure without consultation, in breach of her contract. Priya resigns the same week, setting out in her resignation letter that the commission change — on top of the unresolved exclusion and reallocation — left her with no alternative. A tribunal could treat the commission cut as the last straw in a course of conduct that, taken together, breached the implied term of trust and confidence, provided Priya resigned reasonably promptly and can show she left because of that conduct rather than, say, a better job offer that happened to arrive at the same time.

The two-year qualifying period and its exceptions

The general rule

Under section 108 of the Employment Rights Act 1996, the ordinary right to claim unfair dismissal (including constructive unfair dismissal) does not apply unless the employee has been continuously employed for at least two years ending with the effective date of termination.

Claims available from day one

Several claims do not require any minimum length of service, because they protect rights Parliament has decided should apply from the first day of employment. These include:

• Dismissal (or resignation amounting to dismissal) where the real reason relates to a protected characteristic under the Equality Act 2010, such as sex, race, disability, age or religion — see our guides on disability discrimination claims and age discrimination claims.
• Whistleblowing dismissals, where the reason is that the employee made a protected disclosure.
• Dismissals connected to certain health and safety activities, or to pregnancy and maternity.

If your situation involves one of these factors, it is worth exploring whether a day-one claim is available even if you have less than two years' service — the legal route and evidence needed can differ significantly from an ordinary constructive dismissal claim.

What's changing, and what isn't yet

The Employment Rights Act 2025 received Royal Assent on 18 December 2025. An early version of the reform would have made unfair dismissal a "day one" right with no qualifying period at all, but the government dropped that proposal in November 2025 after opposition in the House of Lords. The confirmed position is that the qualifying period will instead reduce from two years to six months, expected to take effect from 1 January 2027. Until that provision is formally commenced, the current two-year rule in section 108 remains the law — do not assume the shorter period applies to a dismissal happening now.

Time limits and Acas early conciliation

The three-month deadline

Section 111 of the Employment Rights Act 1996 sets the tribunal time limit at three months beginning with the effective date of termination — in practice usually described as three months less one day. For example, if your employment ended on 15 January, the deadline would normally be 14 April. A tribunal can only extend this where it was not "reasonably practicable" to claim in time, which is interpreted narrowly.

Acas early conciliation

Before you can lodge a tribunal claim you must first notify Acas and go through early conciliation, under section 18A of the Employment Tribunals Act 1996. From 1 December 2025, the standard early conciliation window doubled from 6 to 12 weeks, reflecting pressure on Acas and the tribunal system. The time spent in conciliation is added on to extend your tribunal deadline, but you remain responsible for notifying Acas within your original time limit — conciliation does not create extra time before you contact them.

The proposed six-month extension from October 2026

The Employment Rights Act 2025 also provides for the tribunal time limit for most claims — including unfair dismissal — to extend from three months to six months. This is expected to apply to dismissals and other qualifying acts occurring on or after 1 October 2026, following draft regulations approved by Parliament. Because this only applies going forward from that date, anyone whose employment has already ended, or ends before 1 October 2026, should continue to work to the current three-months-less-one-day deadline and confirm the position on GOV.UK if their case is close to that date.

Constructive dismissal versus other claims

It is easy to confuse constructive dismissal with related claims that follow different rules:

| Claim | Who acts | Legal basis | Key limit | |---|---|---|---| | Constructive (unfair) dismissal | Employee resigns because of the employer's fundamental breach | ERA 1996, s.95(1)(c) + s.98 | 2 years' service normally required | | Ordinary unfair dismissal | Employer dismisses the employee | ERA 1996, s.94–98 | 2 years' service normally required | | Wrongful dismissal | Either — usually where notice wasn't honoured | Common law breach of contract | £25,000 cap in tribunal; no cap in court | | Discrimination-related dismissal | Either | Equality Act 2010 | No minimum service required |

A single set of facts can sometimes support more than one of these claims at once — for example, a resignation following a failure to make reasonable adjustments could ground both a constructive dismissal claim and a disability discrimination claim, each with its own rules on service and time limits.

Compensation if you succeed

Basic award

Calculated using a formula based on age, complete years of service (up to a maximum of 20 years) and a capped week's pay figure — the same mechanism used for statutory redundancy pay. The week's pay cap rises each April; check GOV.UK for the current figure before estimating your own position.

Compensatory award and the cap

Covers financial losses genuinely caused by the dismissal, such as lost earnings and lost benefits, subject to the tribunal being satisfied it is just and equitable. For dismissals on or after 6 April 2026, the cap is £123,543 or 52 weeks' gross pay, whichever is lower — check GOV.UK, as this figure changes every April. The Employment Rights Act 2025 provides for this cap to be removed entirely from 1 January 2027, but that change is not yet in force.

Notice pay and wrongful dismissal

If you resigned without notice because of the employer's breach, you may separately be able to claim damages for the notice period you would otherwise have worked (wrongful dismissal). In the tribunal this is capped at £25,000 under the Employment Tribunals Extension of Jurisdiction (England and Wales) Order 1994; a claim above that figure can instead be brought in the County or High Court, where there is no equivalent cap, a six-year time limit applies, and different costs rules apply.

The Acas Code: uplift or reduction

Where the Acas Code of Practice on Disciplinary and Grievance Procedures applied and either side unreasonably failed to follow it, a tribunal can adjust the compensatory award by up to 25% — upward against an employer who ignored the Code, or downward against an employee who did. Skipping the grievance process before resigning is one of the most common ways employees unintentionally reduce their own award.

What to do before you resign

1. Identify the breach clearly. Work out exactly what your employer has done that you say breaches your contract. Vague unhappiness is not enough — you need a concrete act or pattern of behaviour. Write it down with dates.
2. Raise a formal grievance first. In almost every case you should put your complaint in writing through your employer's grievance procedure before resigning. Tribunals expect to see that you gave the employer a genuine chance to fix things, and an unreasonable failure to follow the Acas Code can reduce your compensation by up to 25%.
3. Do not delay once you've decided. Staying on for months while continuing to accept wages risks being treated as affirming the contract. Resigning too quickly without raising concerns carries its own risks, so the timing needs careful thought.
4. Resign and state your reasons in writing. Your resignation letter should make clear you are treating the employer's conduct as a fundamental breach and that you are resigning in response to it, not for an unrelated reason such as a new job offer.
5. Check whether the two-year rule applies to you. If your situation involves discrimination, whistleblowing, or certain health and safety issues, you may not need two years' service — check this before assuming you have no claim.
6. Notify Acas for early conciliation as soon as you can. Do this well within your three-months-less-one-day deadline; conciliation itself can now take up to 12 weeks, and you remain responsible for contacting Acas on time.
7. Take advice before you resign, not after. Resignation is very hard to undo. An early conversation about whether your situation meets the legal threshold, and about the practical and financial consequences of leaving, gives you the best chance of protecting your position.

This guide provides general information about constructive dismissal claims in England and Wales. It is not legal advice and is not a substitute for advice tailored to your specific circumstances. The law described was accurate as at August 2026 and is subject to change — several provisions of the Employment Rights Act 2025 are due to come into force between October 2026 and January 2027, so always check GOV.UK and legislation.gov.uk for the most current position before relying on any deadline or figure in this guide.

Last reviewed: August 2026 by a non-practising solicitor · Next review due: October 2026, or sooner on legislative change.