Extended Employment Tribunal Time Limits: What the 6-Month Window Means for Employers

One of the quieter but more consequential changes in the Employment Rights Act 2025 is a doubling of the standard time limit for bringing most employment tribunal claims, from three months to six months, taking effect from October 2026. For employers, this is not a change in what conduct is unlawful — it is a change in how long a claim can remain live, and therefore how long evidence, witnesses and institutional memory of a dismissal or grievance need to be preserved.

This guide explains what the extension covers, why it was introduced, and what it means in practice for HR record-keeping and risk management.

What the time limit actually covers

The current three-month time limit applies to the majority of employment tribunal claims, including unfair dismissal, discrimination, unlawful deductions from wages, and most other statutory employment claims, running from the date of the act complained of (or the end of employment, for dismissal claims). From October 2026, that standard limitation period extends to six months for the great majority of claim types, giving prospective claimants substantially longer to decide whether to bring a claim and to complete the mandatory early conciliation process with Acas beforehand.

The change was driven partly by evidence that the existing three-month window, combined with the time taken for early conciliation, left some claimants with very little practical time to prepare and lodge a claim, particularly where legal advice was hard to access quickly. Doubling the window is intended to give genuine claims a fairer opportunity to be brought, without changing the underlying legal tests for what counts as unfair dismissal or discrimination.

Why this changes employer risk management

A longer limitation period means a longer period during which an employer needs to be able to substantiate a dismissal, disciplinary outcome, or handling of a grievance. In practice, this affects several things:

• Evidence retention. Investigation notes, disciplinary hearing records, performance management documentation and dismissal letters need to be retained reliably for at least the full extended window, not the shorter period that may have previously felt sufficient.
• Witness availability. Managers and colleagues who were witnesses to events leading to a dismissal or grievance may have left the business, changed role, or simply have a less reliable memory of events by the time a claim is lodged six months later rather than three. Contemporaneous, detailed written records become more valuable, not less.
• Settlement and risk timing. Employers negotiating settlement agreements or assessing litigation risk need to factor in that a decision not to claim within the old three-month window is no longer a reliable signal that the risk has passed — claimants now have twice as long to change their mind or take advice.
• Interaction with the Fair Work Agency. The extension takes effect alongside the launch of the new Fair Work Agency, meaning employers face both a longer tribunal exposure window and a more proactive state enforcement body operating at the same time.

What HR and managers should do differently

The most direct response to a longer limitation period is tightening documentation discipline at the point decisions are made, rather than trying to reconstruct a clear record months later. Dismissal and disciplinary outcome letters should set out reasons clearly and consistently with what was discussed at the hearing; investigation files should be retained as a complete record rather than summarised and discarded; and HR case management systems should be checked to confirm they retain records for at least the new six-month window as a minimum, ideally longer to allow for tribunal proceedings that follow a claim being lodged near the end of the limitation period.

It is also worth reviewing how the extended window interacts with probation and fair dismissal processes and standard disciplinary and grievance procedures, since both rely on clear contemporaneous records that now need to survive a longer period of potential challenge.

Frequently asked questions

When does the extended time limit take effect?

From October 2026, as part of the Employment Rights Act 2025 reform package.

Does the extension apply to every type of tribunal claim?

It applies to the great majority of standard employment tribunal claim types that currently use the three-month limitation period; a small number of claim types have different existing time limits that are not necessarily affected in the same way, so specific claim types should be checked individually.

Does a longer time limit make claims more likely to succeed?

No — the extension changes how long a claimant has to bring a claim, not the legal tests applied once a claim is brought. The practical effect for employers is a longer period of potential exposure and a corresponding need for better record retention, not a change in liability itself.

The extended tribunal time limit is a structural change to employment litigation risk, not a one-off compliance task — it means treating clear, contemporaneous documentation as a permanent discipline rather than something to tidy up only when a claim looks likely. Learnsignal's CPD courses cover this change alongside the other Employment Rights Act 2025 reforms taking effect through 2026.