Tribunal Deadlines & Negotiations
ACAS Early Conciliation & Settlement Agreement Timeline: How to Stop the Tribunal Clock
Negotiating an employment settlement agreement does not automatically pause your statutory deadline to bring an employment tribunal claim. Under UK law, you have exactly three months less one day from your dismissal or detriment to initiate legal action. This guide explains how ACAS Early Conciliation under Section 18A pauses the limitation clock and protects your legal position.
How does ACAS Early Conciliation affect settlement agreement deadlines?
Under Section 111(2) ERA 1996, the tribunal deadline is 3 months less one day from the effective date of termination. Entering settlement discussions does not pause this clock. Contacting ACAS under Section 18A ETA 1996 stops the clock between Day A (notification) and Day B (certificate issue), plus provides at least one additional month from Day B to submit an ET1 claim.
1. The Employer Stalling Trap
One of the most dangerous traps for unrepresented UK employees is the "slow-walk" negotiation. An employer initiates protected conversations under Section 111A of the Employment Rights Act 1996, sends draft heads of terms, and then takes weeks to respond to counter-proposals.
If negotiations drag on past the 3-month-less-one-day mark from your dismissal date without an ACAS notification having been filed, you lose the right to bring an employment tribunal claim. Once your tribunal deadline has expired, the employer holds all the negotiating power and can withdraw or reduce the settlement offer with complete impunity.
2. The Section 18A Extension Mechanism (Day A to Day B)
To prevent employees from being timed out during negotiations, Parliament enacted Section 18A of the Employment Tribunals Act 1996. The extension mechanism works as follows:
The calendar day you submit your online Early Conciliation form to ACAS. The limitation clock stops immediately.
ACAS conciliation lasts up to 6 calendar weeks. All calendar days spent in conciliation are added to your original limitation date.
The day ACAS issues your Early Conciliation certificate. You always receive at least one calendar month from Day B to submit your claim.
Worked Example: Limitation Clock Calculation
Step-by-step calendar breakdown for an employee dismissed on 15 May:
| Milestone | Date | Statutory Rule |
|---|---|---|
| Effective Date of Termination (EDT) | 15 May | Clock starts ticking |
| Primary Limitation Deadline | 14 August | 3 months less 1 day (ERA s.111) |
| Day A: Contact ACAS | 1 August | Clock pauses with 13 days remaining |
| Day B: ACAS Certificate Issued | 22 August | Conciliation concludes (21 days paused) |
| Final Tribunal ET1 Deadline | 22 September | Full 1 month extension from Day B granted |
Tribunal Limitation Notice: Limitation periods in UK Employment Tribunals are strictly enforced. SettlementCheck is an independent technology platform and introducer, not a law firm. Always confirm your exact limitation dates with an SRA-regulated solicitor before letting statutory deadlines elapse.
Frequently Asked Questions: ACAS Timelines
Does negotiating a settlement agreement pause the 3-month tribunal deadline?
No. Settlement negotiations under Section 111A of the Employment Rights Act 1996 or "without prejudice" discussions do not automatically pause the statutory 3-month-less-one-day tribunal limitation period. To freeze the clock, you must formally contact ACAS to initiate Early Conciliation under Section 18A of the Employment Tribunals Act 1996.
What is the ACAS 10 calendar day rule for settlement agreements?
Under ACAS Code of Practice 4, employers are advised as statutory guidance to allow a minimum of 10 calendar days for employees to consider written terms and seek independent legal advice. However, under English contract law (Routledge v Grant, Hyde v Wrench), an employer can technically withdraw an unaccepted offer before acceptance, and a counter-proposal can extinguish the original offer. If an employer applies undue pressure, an employment tribunal may determine this constitutes improper behaviour under Section 111A(4) ERA 1996, removing confidentiality protection.
How does ACAS Early Conciliation pause the tribunal limitation clock?
Under Section 18A of the Employment Tribunals Act 1996, the clock pauses on "Day A" (the day you contact ACAS) and resumes on "Day B" (the day you receive your Early Conciliation certificate). In addition, if the limitation period would have expired during conciliation or within one month of Day B, you receive a full month from Day B to submit your ET1 claim.
Can a settlement agreement be reached through an ACAS COT3 instead of a standard agreement?
Yes. An employment dispute can be settled either via an ACAS COT3 agreement (facilitated directly by an ACAS conciliation officer under Section 18(1) ETA 1996) or via a private settlement agreement under Section 203(3) ERA 1996. Both forms are legally binding waivers of tribunal claims.
What should I do if my employer is stalling negotiations as the tribunal deadline approaches?
Contact ACAS immediately to lodge an Early Conciliation notification before your primary limitation period expires. This freezes the legal deadline and prevents your employer from running down the clock to eliminate your statutory tribunal rights.