Constructive Dismissal

To bring a constructive dismissal claim at an Employment Tribunal, the employee must have at least two years' continuous employment. The breach must be of a fundamental term — either an express contractual term or the implied term of mutual trust and confidence. Resigning 'without prejudice' or citing the breach explicitly in the resignation letter helps preserve the claim. The employee must not delay excessively; continuing to work for several months without protest is often treated as affirmation of the new terms. Compensation is calculated in the same way as unfair dismissal: a basic award (based on age and length of service) plus a compensatory award capped at the lower of £123,543 or 52 weeks' pay (2026/27 figures). Acas Early Conciliation must be attempted before lodging a tribunal claim.

What it means in practice. Constructive dismissal is the hardest common employment claim to win, because you have to prove three things in sequence: that the employer committed a fundamental breach of contract, that you resigned in response to it, and that you did not delay so long that you accepted the new position. A series of smaller incidents can add up, with a relatively minor final act operating as the "last straw" — but the last straw must itself contribute something to the breach, and a reasonable management instruction will not do.

A worked example. Priya is demoted without consultation, has her duties stripped away over three months, and is then publicly criticised by her manager in a team meeting. She raises a formal grievance setting out each incident. The grievance is dismissed in two lines without a meeting. She resigns the following week, stating in her resignation letter that she is resigning because of the breach of trust and confidence caused by the demotion, the removal of duties, and the handling of her grievance. That contemporaneous letter, and the short gap between the final act and the resignation, become the strongest evidence in her claim.

Common pitfalls. Resigning too soon is a mistake; resigning too late is worse. Raise a grievance first, both because it may resolve matters and because it creates a record and shows you did not accept the treatment. Say why you are resigning in the letter — a bland "for personal reasons" resignation is very hard to overcome later. And remember that resigning ends your income, so consider whether you can afford to leave before you do.

How it relates to other terms. Once established, the claim is treated as an unfair dismissal, with the same qualifying period, remedies, and cap. If notice was not given or paid, there is a parallel wrongful dismissal claim. Employers often respond with an offer documented as a settlement agreement, and every claim must first go through Early Conciliation.

What to do next. Take advice before you resign — read our constructive dismissal guide first. Raise a written grievance using the grievance process to build the record, and if you do resign, start Acas Early Conciliation immediately to protect the three-month deadline.