What is the deadline for et1 discrimination claim?
A discrimination claim must usually reach the Employment Tribunal within three months less one day from the act complained of. ACAS Early Conciliation can change the final date.
Calculate your deadline
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Worked example
- Example input
- 03/08/2026
- Expected result
- Monday 2 November 2026
The act complained of occurred on Monday 3 August 2026, before any ACAS adjustment.
The calculator applies three calendar months less one day using the corresponding-date rule. ACAS Early Conciliation dates can alter this result.
How this deadline is counted
- Period
- Three calendar months less one day
- Trigger
- Date of the act complained of
- Direction
- Forward from the act complained of
- Counting method
- Calendar months, then subtract one day
The calendar-month calculation preserves the corresponding date where possible. The calculator shows any resulting month-end treatment.
Equality Act 2010, section 123. Equality Act 2010, section 123. Employment Tribunal Procedure Rules 2024 and cited statute checked 06/08/2026
Exceptions and matter facts
- Conduct extending over a period is treated under the continuing-act provisions in section 123 and requires a fact-specific check.
- ACAS Early Conciliation changes the calculation. The Tribunal also has a just-and-equitable discretion to extend time.
Deadline Engine is calculation software, not legal advice. Check the current rule, any order and the facts before adding a date to your diary.