Constructive dismissal UK

What constructive dismissal means in plain English

In a normal dismissal, the employer ends the contract: the employee is fired, made redundant or has a fixed term that is not renewed. In a constructive dismissal, the employee ends the contract by resigning, but the resignation is forced on them by something the employer did or failed to do. The law looks past the resignation itself and treats the employer as having dismissed the employee.

The reason this matters is that an employee who simply resigns has no claim. An employee who is constructively dismissed has, in principle, the same claim as an employee who was sacked: unfair dismissal, with a basic award and a compensatory award covering lost earnings and benefits. The catch is that the bar for proving constructive dismissal is high.

The legal definition

The statutory definition is in section 95(1)(c) of the Employment Rights Act 1996. An employee is dismissed by their employer if the employee terminates the contract under which they are employed, with or without notice, in circumstances in which they are entitled to terminate it without notice by reason of the employer’s conduct.

Case law unpacks that single sentence into four tests an employment tribunal applies. There must be an actual breach of contract by the employer. The breach must be fundamental, meaning it goes to the root of the employment relationship. The employee must resign in response to the breach, not for some unrelated reason. And the employee must not delay so long that they have, by their conduct, accepted the new terms.

All four limbs have to be satisfied. Most failed claims fall at the second or fourth: the breach is not serious enough, or the employee stayed too long after the breach to credibly say they resigned because of it.

The Employment Rights Act 1996 in practice

Section 95 frames the claim. Section 98 sets out the test for whether a dismissal (including a constructive one) is unfair. Sections 119 to 122 set the calculation rules for the basic award, which mirrors statutory redundancy pay. Section 124 caps the compensatory award. Section 207A, inserted by the Employment Act 2008, lets tribunals adjust awards by up to 25% where either side has failed to follow the ACAS Code of Practice.

The practical effect for an employee considering a claim is that the ACAS Code matters as much as the statute. If you resign without first raising a formal grievance, a tribunal can reduce your compensation by up to 25% even if you win. If the employer ignores a grievance, the tribunal can increase your award by up to 25%.

Common examples that meet the threshold

The patterns below appear repeatedly in tribunal decisions. None of them is automatic; the tribunal still examines the facts. Together they show the shape of conduct that the courts treat as a fundamental breach.

A unilateral, significant pay cut imposed without consultation or contractual basis is the textbook case. A forced demotion to a materially lower role with no performance justification is another. Sustained bullying or harassment that the employer fails to investigate or address, despite a formal complaint, breaches the implied term of mutual trust and confidence. So does a serious health and safety failure that puts the employee at risk.

Refusal to pay agreed wages, holiday pay or contractual bonuses can be a fundamental breach if the amount is material. So can a unilateral change to working pattern, location or hours that is not supported by a contractual flexibility clause. Discrimination on a protected characteristic that the employer refuses to address is a breach in itself and can also support a separate discrimination claim.

For more detail on what does and does not count, see the companion page on constructive dismissal examples.

Evidence you need

A constructive dismissal claim turns almost entirely on documentary evidence and timing. The employee carries the burden of proof. Tribunals look for a written record of what was said, when, and by whom. Verbal complaints with no written follow-up are routinely discounted.

The minimum documentary trail is contemporaneous notes of the breach itself, a written grievance raised through the employer’s formal process, the employer’s response (or absence of one) and the resignation letter referencing the breach. Witness statements from colleagues help, but only if those colleagues are willing to give evidence at tribunal. Personal-device screenshots of work messages can be useful, but check the data protection and confidentiality position before relying on them.

If you are still employed and considering a claim, start the documentation now. Keep copies offline. Make sure every grievance is in writing. Use email rather than instant messaging. Date everything.

Notice periods and resignation

You can resign with notice or without notice. Resigning with notice is the safer route in most circumstances. It preserves your income during the notice period and shows the tribunal that you behaved professionally. The resignation letter should make clear that you are resigning in response to the breach, reserving your right to bring a claim for constructive dismissal.

Resigning without notice is permitted by section 95(1)(c) but only where the breach is serious enough to entitle you to walk away immediately. Doing so when the breach is less than fundamental risks the tribunal finding that you were in repudiatory breach yourself and were not constructively dismissed at all. Take advice before resigning without notice.

For the date arithmetic on either route, the notice period calculator and the final working day calculator do the maths. The constructive dismissal resignation letter template is a starting point only; tailor the wording to your specific breach.

Compensation

Successful claims yield two awards. The basic award is calculated like statutory redundancy pay, using age bands, years of service and a weekly pay cap (currently £700 per week for redundancies on or after 6 April 2024). The compensatory award covers actual loss of earnings, benefits and pension contributions from the dismissal until you find work paying the same as before, subject to a statutory cap.

For claims presented on or after 6 April 2024 the compensatory cap is £115,115 or 52 weeks’ gross pay, whichever is the lower. Most awards land far below the cap. The median award in successful unfair dismissal claims is around £6,000 to £15,000. High awards are rare and usually involve loss of a high-earning role with no comparable alternative.

See the detailed page on constructive dismissal compensation for worked examples and the tax treatment.

The tribunal process

Constructive dismissal claims are brought at an Employment Tribunal. The sequence is fixed. You must first notify ACAS for early conciliation. ACAS will offer a free, confidential conciliation process lasting up to six weeks. If conciliation fails or the employer refuses, ACAS issues an early conciliation certificate. You then have a deadline to present an ET1 claim form to the tribunal.

The tribunal will list a preliminary hearing to identify the issues, then a full hearing where both sides give evidence under oath, witnesses are cross-examined and the tribunal makes findings of fact. Most claims that reach a full hearing take between six and fourteen months from ET1 to judgment.

The majority of claims settle before the full hearing, either through ACAS early conciliation, through judicial mediation at the tribunal, or through direct negotiation between the parties. Settlement values are almost always lower than the maximum tribunal award but avoid the cost, delay and risk of a hearing.

ACAS early conciliation

ACAS early conciliation is mandatory before bringing a tribunal claim. You start by notifying ACAS, either online or by phone. ACAS contacts the employer to ask whether they want to take part in conciliation. The conciliation process is confidential, free and conducted by a neutral ACAS officer who does not advise either side on the merits.

Most employers participate, because conciliation gives them control over the outcome and avoids tribunal cost. A settlement reached through ACAS conciliation is recorded on a COT3 form and is binding. Once signed, you cannot bring the same claim at tribunal.

The time limit for the tribunal claim pauses during the conciliation period and resumes when ACAS issues the early conciliation certificate. The detail is on the time-limits page below; the practical implication is that you can use the conciliation window without losing the right to claim.

Time limits

The headline rule is three months less one day from the effective date of termination (your last day of employment). Constructive dismissal claims have the same time limit as unfair dismissal claims because the law treats them as dismissals.

The ACAS early conciliation period pauses the clock. Notify ACAS at least one month before the deadline, ideally as soon as you have resigned, to leave headroom. The full mechanics, the impact of late notification, and the rare circumstances where the tribunal will extend the deadline, are covered in detail on the constructive dismissal time limits page.

Missing the deadline almost always defeats the claim. The tribunal’s discretion to extend is very narrow and will only be used where it was not reasonably practicable to present the claim in time. Ignorance of the law, waiting for an internal appeal, or being unwell are not usually enough.

Alternatives before resigning

Resignation is irreversible. Before you resign, exhaust the internal options unless the breach is so serious that staying is impossible. A formal grievance gives the employer the chance to remedy the breach. A grievance that is ignored or dismissed strengthens a subsequent tribunal claim, because the tribunal sees that you tried the proper channel first.

Other steps worth considering are mediation (internal or external), a without-prejudice conversation about a settlement agreement, raising a grievance through a trade union if you are a member, and obtaining a fixed-fee opinion from a specialist employment solicitor on the strength of your case. None of these prevents a later claim if the breach is not addressed.

A settlement agreement is often the best practical outcome. The employer gets certainty and avoids tribunal cost. The employee gets a tax-efficient lump sum, an agreed reference and a clean exit without the public stress of a hearing. Use the settlement agreement calculator to model the gross value of a potential package.

Related calculators

The calculators on this site do the date and money maths that go alongside a constructive dismissal decision.

• Settlement agreement calculator — model the gross value of a settlement offer.
• Notice period calculator — final working day from any resignation date.
• Final working day calculator
• Holiday entitlement calculator — accrued holiday paid out at termination.
• Redundancy runway calculator — how long the post-employment money will last.
• Can I afford to quit calculator — runway maths before you resign.

Related guides

• Constructive dismissal examples
• Can I claim constructive dismissal?
• Constructive dismissal compensation
• Constructive dismissal time limits
• Employment tribunal UK — the dispute-resolution route for constructive dismissal claims.
• ACAS early conciliation — the mandatory pre-claim step.
• Notice period rights UK
• Redundancy rights UK
• Employment rights hub
• Employment law index

Frequently asked questions

What is constructive dismissal in UK law?

Constructive dismissal is when an employee resigns in response to a fundamental breach of the contract of employment by the employer, and the law treats that resignation as a dismissal by the employer. The legal basis is section 95(1)(c) of the Employment Rights Act 1996. The employee must resign promptly in response to the breach, not delay so long that they appear to have accepted the new terms.

What counts as a fundamental breach of contract?

A breach so serious that it goes to the root of the employment relationship. Common examples include a unilateral cut to pay, a forced demotion, a sustained failure to address bullying or harassment after a formal complaint, a significant unilateral change to duties, refusal to pay wages, and a serious breach of health and safety duties. Minor or technical breaches do not qualify.

Do I have to resign to claim constructive dismissal?

Yes. Constructive dismissal only exists where the employee has resigned in response to the breach. You cannot claim it while still employed. Most legal advice is to raise a formal grievance first, give the employer a reasonable chance to remedy the breach, and only resign if the breach is not addressed. Resigning is irreversible and ends your income.

How long do I have to make a claim?

Three months less one day from the effective date of termination (your last day of employment). Before the tribunal stage, you must notify ACAS for early conciliation. The clock pauses while ACAS conciliation is open, then resumes. Missing the deadline almost always defeats the claim, regardless of how strong the underlying breach was.

What can I claim in compensation?

Two awards: a basic award (calculated like statutory redundancy pay, based on age, length of service and a capped weekly pay figure), and a compensatory award covering loss of earnings, benefits and pension, capped at the statutory maximum or 52 weeks of pay, whichever is lower. The compensatory cap for claims presented on or after 6 April 2024 is £115,115 or 52 weeks' pay, whichever is the lower.

Do I need a lawyer to bring a claim?

You can represent yourself, but for anything beyond a clear-cut, well-evidenced case, take advice. Constructive dismissal claims fail more often than they succeed and the legal tests are nuanced. ACAS provides free guidance and conciliation. A specialist employment solicitor will typically offer a fixed initial consultation. Trade unions and Citizens Advice can also help.

What is the difference between constructive dismissal and unfair dismissal?

Unfair dismissal is when the employer dismisses the employee without a fair reason or fair process. Constructive dismissal is when the employee resigns because of a fundamental breach by the employer and the resignation is then treated in law as a dismissal. Both, if successful, can lead to a basic and compensatory award. Constructive dismissal claims are normally also framed as unfair dismissal claims at tribunal.

Is constructive dismissal worth pursuing?

Sometimes. The reality is that most claims settle or fail rather than win a maximum award. Compensation is usually limited to actual loss of earnings until you find a comparable job. If you are facing a clear, evidenced breach with documented complaints and a recent resignation, a claim is worth exploring. If your case relies on a single ambiguous incident or you have stayed in post for months after the breach, it will be much harder.

General information about UK employment law, not legal advice. Constructive dismissal claims are fact-sensitive and the time limits are short. For your specific situation, contact ACAS or an employment-law solicitor before you resign.