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deadlines

Employment

Updated 2026-05

ACAS Early Conciliation Date Calculator

Calculate the extended Employment Tribunal claim deadline after ACAS Early Conciliation using the 'stop the clock' rule under section 207B of the Employment Rights Act 1996.

Calculator — accuracy depends on current rates

This calculator uses the rules and figures published on the dates shown. Rates, thresholds, and fees change — always verify the current figure on the official government website before paying or filing. The output is not legal advice.

Rates current as of: 2026-06-12.

Privacy: runs entirely in your browser. Nothing you enter is sent to us or saved.

When to use this tool

Use immediately after receiving your ACAS Early Conciliation Certificate. The certificate shows Day A (when ACAS was notified) and Day B (when the certificate was issued). The time between Day A and Day B is added to your original ET deadline — plus one further day. Use this calculator to find your exact extended deadline and check how many days remain.

Important: This tool is for guidance only and does not constitute legal advice. ET deadlines are strictly enforced — missing the deadline can permanently bar your claim. Always verify with a qualified employment solicitor before relying on this output.

ACAS Early Conciliation Date Calculator

How the stop-the-clock rule works (ERA 1996 s.207B)

Your standard deadline is 3 months less 1 day from the date of the act complained of.
When you contact ACAS for Early Conciliation, the clock stops on Day A (the date ACAS notified you it received your request).
The clock restarts on Day B + 1 (the day after the EC Certificate is issued).
Your extended deadline = original deadline + (Day B − Day A) + 1 day.

Date of act complained of

For unfair / constructive dismissal: your Effective Date of Termination (EDT). For discrimination: the date of the discriminatory act (or last act in a series).

Day A — Date ACAS notified you of receipt

From your EC Certificate — the date ACAS sent notification it received your request.

Day B — Date EC Certificate issued

From your EC Certificate — the date ACAS issued the certificate closing conciliation.

Next steps

Read the full guide

Official Resources

ACAS Early Conciliation →Employment Tribunals — Make a claim →ERA 1996 s.207B — legislation.gov.uk →