Acas early conciliation is usually the pre-claim settlement stage; the employment tribunal is the independent judicial process that determines claims. This guide helps you move from one to the other without losing limitation.
Use this guide to separate the facts, the legal route and the practical remedy. Workplace disputes often involve more than one right, so keep each strand distinct.
Key points
- Identify the exact decision, event or omission before choosing a legal label.
- Ask who made the decision and which employer policy, contract term or statutory rule is relied on.
- Preserve contemporaneous evidence and the employer’s reasons before memories and records change.
- Protect Acas and tribunal time limits even while an internal process is continuing.
Diagnosis
First: what exactly happened?
Work out which route fits the facts before deciding what to ask the employer to do. Similar workplace problems can use different legal tests.
| What happened? | What to check |
|---|---|
| The issue has just happened | Record the facts, decision-maker, date, impact and any immediate deadline. |
| An internal process is underway | Use the employer process, but protect any external time limit separately. |
| The employer disputes your version | Identify the documents, contemporaneous records and witnesses that can resolve the factual dispute. |
| The issue overlaps another right | Separate each legal strand rather than relying on one label. |
Use this as a routing page, not a competing duplicate
This page joins two closely related subjects. For the detailed legal and evidential analysis, follow the canonical guides linked below; this route remains useful where the same facts span both subjects.
Who is responsible?
The employer is responsible for its own employment decisions and processes, even where HR, payroll, occupational health, an external investigator or software supplier is involved. Identify the actual decision-maker and the legal entity that employs you.
Managers and HR may administer a process, but outsourcing advice or relying on a policy does not transfer away the employer’s legal responsibility.
Early conciliation first
For most tribunal claims, the claimant must notify Acas before filing. The notification and certificate affect the limitation calculation.
Settlement versus determination
Acas can facilitate agreement but does not decide the merits. A tribunal determines the claim if it proceeds.
Certificate to ET1
Keep the certificate details and use them accurately on the ET1. Recalculate the deadline after early conciliation rather than relying on the original date alone.
In plain English
Acas is the gateway for most contemplated tribunal claims.
Acas describes early conciliation as a legal process. A person considering an employment tribunal claim generally needs to notify Acas first. Acas can then offer early conciliation to explore settlement.
- Try to resolve the workplace problem where appropriate.
- Do not assume a grievance or appeal pauses a tribunal deadline.
- Notify Acas within the applicable time limit if a claim is being considered.
- Keep the early-conciliation certificate and dates.
Early conciliation is not representation.
Acas conciliators are impartial. They can explain the process and help explore settlement, but they do not represent either side, decide the merits or prepare the tribunal case.
The deadline calculation can become complicated.
Acas states that many tribunal claims use a short time limit and that early conciliation affects how time is calculated. The exact deadline can depend on the type of claim and the early-conciliation dates, so use the current Acas guidance rather than a rough calendar assumption.
A settlement through Acas can be binding.
Where agreement is reached through Acas, it can be recorded in a COT3 agreement. Treat settlement wording seriously: once a dispute is validly settled, it can prevent the same claim continuing.
Keep internal and external routes in parallel view.
An appeal or grievance may still be strategically important even where Acas has been notified. Track both processes in one chronology so that an internal deadline does not obscure the tribunal timetable.
Prepare before contacting Acas.
- One-paragraph description of the dispute.
- Employment start/end dates and the date of the act complained of.
- Potential claims and current limitation calculation.
- Gross/weekly pay and a provisional loss figure where relevant.
- Settlement objectives, including non-financial terms.
- Key documents available if the respondent disputes the basic facts.
You do not need to prove the whole case to Acas, but knowing the legal and factual shape of it prevents conciliation from becoming an unfocused discussion.
Do not let an internal process dictate the external deadline.
A grievance, disciplinary appeal or redundancy appeal can continue while the tribunal deadline is approaching. Internal proceedings generally do not pause time. From 1 October 2026 most newly starting tribunal limitation periods increase to six months minus one day, but the current rule remains relevant to periods that started before then.
Use two calendars.
Maintain one calendar for the employer’s internal deadlines and another for Acas/tribunal limitation. Never assume one automatically protects the other.
The normal route is problem → Acas notification → certificate → ET1.
Most tribunal claims require early-conciliation notification before the ET1 is presented. The limitation clock is affected by the early-conciliation period. If settlement is not reached, the claimant uses the certificate details when submitting the claim.
There are exceptions and specialist procedures. An application for interim relief in certain dismissal cases, including qualifying whistleblowing dismissals, is exceptionally urgent and generally has a seven-day deadline.
Acas and the tribunal have different jobs.
Acas provides advice and conciliation; an employment tribunal is the judicial body that determines claims. Acas does not decide whether a dismissal was unfair, whether discrimination occurred or how much compensation is legally due. A conciliator can help the parties reach a binding settlement without a hearing.
This means an Acas conversation should not be treated as a substitute for preparing the legal claim, calculating limitation or preserving evidence.
What can you realistically ask for?
Choose a remedy that matches the problem. Internal processes can often correct a decision or record; statutory compensation and tribunal remedies depend on the legal claim.
- Correction of the workplace decision where possible
- Payment or compensation where the relevant right provides it
- Internal findings, apology or process changes where appropriate
- External enforcement or tribunal remedies where the legal route allows
Evidence worth keeping
Preserve the original record where possible. A short, dated evidence set is usually more useful than an unstructured dump of documents.
Common employer responses - and what they do not necessarily prove
| Employer says | ConsumerWise view |
|---|---|
| “This is just company policy.” | Internal policy does not override statutory rights. |
| “HR has decided, so the issue is closed.” | Internal findings do not prevent use of an applicable appeal, Acas or legal route. |
| “You must finish the internal process first.” | Internal action can be useful, but external limitation should be checked independently. |
What to say next
Keep the next response short and issue-led. State the decision you challenge, the evidence or rule you rely on, the specific answer you still need and the remedy you want. If the employer relies on a policy or business reason, ask it to identify the relevant provision and explain how it applies to your facts.
Important overlaps and exceptions
- Check whether discrimination, whistleblowing, pay, data or dismissal rights also apply.
- Employment status can change which statutory rights are available.
What to do
A practical next-step plan
- Write down the event or decision, the date, who made it and the practical impact.
- Identify the legal or contractual right that may apply instead of relying only on the word “unfair”.
- Collect the smallest evidence set that proves the key facts and the employer’s stated reason.
- Use the relevant internal request, grievance, appeal or complaint route and ask for a specific remedy.
- Check Acas and tribunal limitation separately. Do not let a slow internal process cause an external deadline to expire.
Escalation and time limits
Internal procedures can be important, but they do not normally stop an employment tribunal time limit. As at 11 September 2026, most claims whose limitation period starts before 1 October 2026 still use the existing three-month-minus-one-day framework. For most relevant time limits starting on or after 1 October 2026, the period increases to six months minus one day.
Acas early conciliation can affect calculation of the deadline if Acas is notified in time. Some claims use different limits, and interim relief in qualifying dismissal cases can require action within only 7 days. Always check the specific claim rather than applying a general period mechanically.
Official sources
Check the current source material.
- Acas: early conciliation ↗
- Acas: how early conciliation works ↗
- Acas: employment tribunals ↗
- GOV.UK: employment tribunals ↗
- Acas: employment tribunal time limits ↗
ConsumerWise explains these materials in plain English. Employment law and procedure can change, so check the current official source before relying on a deadline, eligibility rule or legal test.