Employment tribunal deadlines: seek advice promptly

Employment tribunal time limits must be calculated for the particular claim and relevant event. As checked on 9 September 2026, Acas states that most claims currently have a limit of three months minus one day. Some claims use different periods, and certain interim relief applications have a seven-day limit. ^[1]

Record the dates that drive the calculation

Identify the dismissal date, deduction date or alleged discriminatory act, together with Acas notification and certificate dates. Do not substitute the date you received legal advice or the date a grievance ended.

An internal appeal, grievance or settlement discussion does not automatically stop the tribunal clock. Early conciliation has specific effects that must be calculated from the actual dates, so retain the notices rather than relying on memory.

Account for the 2026 transition

Acas states that from 1 October 2026 most limits increase to six months minus one day where the time limit starts on or after that date. ^[1] Its implementation timetable identifies a later 9 November 2026 change for breach-of-contract claims in Scotland. ^[2] Do not apply the longer period to an earlier event without checking the transition.

Use early conciliation preparation alongside deadline advice. If dismissal followed whistleblowing, tell the adviser immediately because that claim may raise an especially urgent remedy. Northern Ireland has a separate tribunal and conciliation framework.

Treat each potential claim as a separate timing question Write down the legal issue you want assessed and the event that may start its limit. Dismissal, an unpaid payday and a discriminatory decision can occur on different dates within the same dispute. One general deadline entered in a calendar may therefore be misleading. Give the adviser the documents establishing each event and distinguish the date something happened from the date you discovered or challenged it. The legal starting point requires assessment and should not simply be chosen as the date most favourable to the intended claim.

For employment ending, supply the dismissal communication, notice terms and any payment in lieu arrangement. The last day physically worked may differ from the effective termination date. For pay, keep the scheduled payday and the actual payment record. For discrimination, identify each alleged act and any argument that conduct continued over time. A continuing consequence is not automatically a continuing act. If several events are involved, a dated list enables the adviser to consider their relationship without assuming that the latest complaint makes all earlier events timely.

Understand the September 2026 position Acas guidance checked on 9 September 2026 states that most tribunal claims currently have a limit of three months minus one day, with different periods for some claims. [1] These are calendar calculations, not a rough count of working days. Do not delay because a deadline falls near a weekend, holiday or an employer's office closure. Where a claim or remedy has an unusually short period, raise that at the first contact with an adviser rather than booking a routine appointment after the relevant date may have passed.

The forthcoming extension for most claims applies where the time limit starts on or after 1 October 2026, according to the current Acas guidance. The implementation timetable separately identifies 9 November 2026 for the Scottish breach-of-contract change. ^[2] An event in September should not simply be assigned six months because the claim would be filed after October. Ask how the transition applies to the particular claim and facts, and retain the source and date of any advice so later changes in guidance do not obscure the basis of the calculation.

Record the conciliation dates that actually occurred Keep evidence of when Acas was notified and the certificate details issued when early conciliation ends. A first call to a helpline is not necessarily the formal notification event. If more than one respondent or certificate is involved, preserve each record and ask how it affects the calculation. Early conciliation has specific effects on time limits, including the need to notify in time for the relevant pause. Do not add a guessed number of weeks or assume that every second notification creates a fresh extension.

Distinguish notification, participation in discussion and submission of a tribunal claim. They are separate steps with different records. The conciliator does not automatically lodge the claim for you. If an adviser or representative is handling a step, confirm who is responsible and by when, then retain confirmation of completion. A diary reminder is useful, but evidence that the required action was actually taken is more important. If the online service fails, preserve the error and seek prompt procedural guidance rather than waiting until the following day to investigate.

Keep internal procedures from obscuring the external clock Record grievance, appeal and settlement dates, but do not substitute them for the claim's starting event. An employer's promise to respond next month does not automatically protect your tribunal position. Tell the adviser about ongoing discussions so they can consider how to preserve the claim while resolution is explored. If the employer describes an internal outcome as final, that wording does not calculate the external limit. The deadline assessment should remain a separate, explicit task with the underlying dates and any uncertainty clearly recorded.

If you believe time has already expired, obtain advice promptly rather than assuming either that the claim is impossible or that an extension will be routine. Different claims use different extension tests, and tribunal limits are generally applied strictly. Explain the reason for delay with supporting evidence and identify what action can still be taken. Keep the final advice and filing confirmation together. A reliable deadline record should show the claim, triggering event, conciliation dates, transition analysis and responsibility for submission, not merely an unexplained date copied from a generic calculator.