This guide is maintained as a current resource for July 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Clear guide to challenging unfair dismissal in an employment tribunal in England and Wales: how to meet eligibility rules, mandatory Acas early conciliation, strict time limits, claim procedures, evidence and hearings, potential compensation, and practical steps for claimants. Fully accessible legal overview for workers and professionals.

Unfair dismissal occurs when an employer terminates an employee's contract without a fair reason or without following a fair process. In England and Wales, employees with sufficient qualifying service normally have the legal right to challenge such dismissals before an employment tribunal. This article explains what unfair dismissal means, how to prepare and file a claim, the legal procedures involved, time limits you must meet, remedies available, and practical steps claimants can take. The guide is intended for people with no legal background, as well as students and solicitors seeking a clear overview of the law and process.
1. What Is Unfair Dismissal?
Under UK law, unfair dismissal means that an employer has ended your employment without:
- a fair reason, such as misconduct, capability or redundancy, or
- following a fair procedure, including investigation, warnings and an appeal process.
To challenge unfair dismissal at a tribunal you generally must have worked continuously for your employer for at least two years before your dismissal, unless your dismissal is automatically unfair (for example, because of discrimination, whistleblowing or asserting a statutory right).
2. Check Your Eligibility Before Proceeding
Qualifying Service
Most unfair dismissal claims require a two‑year qualifying period of employment. If you have not met this, you may still have grounds for other claims such as discrimination or wrongful dismissal.
Automatically Unfair Dismissals
Some dismissals are treated as unfair regardless of length of service:
- dismissal for whistleblowing
- dismissal for acting as a health and safety representative
- dismissal related to pregnancy and maternity rights
- dismissal for asserting certain statutory rights.
These situations allow you to bring a tribunal claim even without the usual service requirement.
3. Internal Resolution and Employer Appeal Rights
Grievance and Appeal Procedures
Before tribunal action, it's often advisable to engage your employer's internal grievance and appeal procedures. Most employers publish these in their employee handbooks or contracts. Completing an appeal can:
- help clarify the employer's position, and
- demonstrate that you attempted to resolve the issue internally, which may influence the tribunal's view.
However, internal processes do not extend your legal time limits to bring a claim, and you should not rely on them alone to protect your legal position.
4. Mandatory Early Conciliation with Acas
Before you can lodge a claim with a tribunal you must notify Acas (the Advisory, Conciliation and Arbitration Service) that you intend to make a claim. This is known as early conciliation and is a mandatory legal requirement.
During early conciliation:
- Acas contacts both parties to explore whether the dispute can be resolved without formal tribunal action.
- The tribunal time limit clock is paused while conciliation is active, giving you more time to negotiate or prepare your case.
Early conciliation may result in a settlement agreement or may simply provide clarity on the strengths and weaknesses of both sides' positions.
5. Time Limits for Bringing a Tribunal Claim
Strict time limits apply to tribunal claims:
- You must notify Acas and start the conciliation process within three months less one day from the effective date of termination of your employment for unfair dismissal.
- Once you have the Acas Early Conciliation Certificate, you can file your tribunal claim with the tribunal.
- The conciliation process pauses the time limit and extends it by the period conciliation was ongoing.
Missing these deadlines can lead to your claim being rejected by the tribunal, subject to very limited exceptions for extension based on equity and fairness.
6. How to Make a Claim to an Employment Tribunal
Prepare Your Evidence and Documents
To start a claim you must complete an ET1 form and submit it either online or by post.
You should include:
- dates and reasons for dismissal
- details of your employment history and pay
- copies of your contract, termination letter and any relevant emails
- a brief summary of why you believe the dismissal was unfair.
Submit the Claim
- Ensure you have received your Acas Early Conciliation Certificate.
- Lodge the ET1 form with the appropriate tribunal office within the time limits.
- The tribunal will acknowledge receipt and send a copy to the respondent (your former employer).
Respondent's Reply
After the respondent receives a copy of your claim, they must file an ET3 defence form, outlining their response to your allegations. This typically must be done within 28 days.
7. Case Management and Hearing Preparation
Once both sides have submitted their pleadings:
- the tribunal may list a Case Management Hearing or proceed to a Final Hearing;
- you will be required to prepare a Schedule of Loss, setting out your claimed compensation;
- both parties exchange evidence and witness details in advance;
- tribunal directions set the timetable for disclosure of documents, submissions and hearing dates.
Tribunals are less formal than courts, but strict rules on evidence and procedure still apply. Getting familiar with those rules early improves your chances of presenting your case effectively.
8. Remedies and Compensation
If your unfair dismissal claim succeeds, the tribunal may award:
- a basic award (similar to statutory redundancy pay), calculated by length of service, age and weekly pay;
- a compensatory award for financial loss (wages lost, benefits lost, job search costs), capped at a statutory limit for ordinary unfair dismissal.
The tribunal may increase or reduce awards based on whether either party failed to follow the Acas Code of Practice on disciplinary and grievance procedures.
Absence of a fair procedure or discriminatory conduct can increase compensation, and discrimination claims may attract injury to feelings awards which are uncapped.
9. Practical Considerations and Risks
Tribunal Delays and Backlogs
Employment tribunals have been experiencing significant backlogs, leading to delays between filing a claim and reaching a hearing. Claimants should be prepared for a potentially extended process and manage expectations accordingly.
Costs and Representation
Procedural complexity varies: represented cases (by solicitors or barristers) can cost more but often yield better outcomes. Litigants in person must carefully follow tribunal guidance and deadlines to avoid procedural dismissal.
10. Common Questions
Can I challenge dismissal without going to tribunal?
Yes. Early conciliation or a settlement agreement can resolve disputes without a tribunal hearing.
Do I need a solicitor?
You are not required to have legal representation, but expert advice may improve outcomes, especially in complex cases with large compensation claims.
Can a tribunal award my job back?
Tribunals may award reinstatement or re‑engagement in some cases, but this is uncommon and depends on individual circumstances.
Summary
Challenging an unfair dismissal in an employment tribunal involves understanding your eligibility, using internal grievance and appeal routes, and satisfying strict time limits. You must start with Acas early conciliation, lodge an ET1 claim form with supporting evidence, and prepare for tribunal proceedings. If successful, you can recover compensation for lost earnings and statutory rights. Awareness of procedural requirements, potential remedies, and practical hurdles empowers claimants to pursue their claims effectively in the legal system of England and Wales.