Employment Tribunal: What to Expect as an Employer

Last updated: April 2026

Receiving an employment tribunal claim is one of the most stressful events in business. It arrives in the post, usually via an ET1 form from HM Courts and Tribunals Service, and suddenly your decisions as an employer are under formal scrutiny.

Most employers never face a tribunal. But those who do are often blindsided by how long the process takes, how much it costs, and how much internal disruption it causes.

The average employment tribunal costs an employer around £8,500 to £10,000 when you include legal fees, management time, and preparation. Even if you win, you do not recover those costs. And if you lose, the bill climbs significantly higher.

This guide walks you through the entire employment tribunal process from an employer's perspective: what happens at each stage, what it costs, and how to build the strongest possible defence.

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The Employment Tribunal Process: A Step-by-Step Guide for UK Employers

The employment tribunal process follows a set sequence. Understanding each stage helps you respond effectively and avoid the mistakes that turn manageable claims into expensive losses.

Stage 1: Early Conciliation Through ACAS

Before an employee (or former employee) can submit a tribunal claim, they must contact ACAS and go through Early Conciliation. This is mandatory.

ACAS will contact you and attempt to broker a settlement. Early Conciliation can last up to six weeks, though many cases resolve within two or three.

What you should do:

• Take the ACAS call seriously. This is your cheapest exit.
• Do not ignore it. If ACAS cannot reach you, the claimant receives an Early Conciliation certificate and proceeds directly to the tribunal.
• Consider the commercial reality. Even if you believe you are in the right, settling at this stage costs a fraction of defending a full hearing.

Around 30% of cases settle during Early Conciliation. If yours does not, ACAS issues an Early Conciliation certificate with a reference number. The claimant then has one month to file their tribunal claim.

Stage 2: Receiving the ET1 Claim Form

The ET1 is the claimant's formal complaint. It sets out the factual background, the legal basis for the claim (unfair dismissal, discrimination, unpaid wages, etc.), and what remedy they are seeking.

You will receive a copy from the tribunal, along with an ET3 response form and a deadline to respond. The standard deadline is 28 days from the date the ET1 was sent to you.

Critical: Missing the ET3 deadline is catastrophic. If you do not respond in time, the tribunal can issue a default judgment against you. That means the claimant wins without you ever presenting your side.

Stage 3: Submitting Your ET3 Response

Your ET3 is your defence. It should set out your version of events, challenge the claimant's factual account where it is inaccurate, and explain the legal basis for your position.

Tips for a strong ET3:

• Be specific. Vague denials are unconvincing.
• Attach a chronology of events with dates.
• Cross-reference your documentation: meeting notes, investigation records, letters, emails.
• If the disciplinary procedure is relevant, explain exactly how you followed it.
• Do not exaggerate. Tribunals are experienced at spotting employers who overstate their case.

If you are using legal representation, your solicitor will draft the ET3. If you are self-representing, take the time to get this right. The ET3 shapes the entire case.

Stage 4: Case Management

After both sides have filed their forms, the tribunal schedules a Case Management Preliminary Hearing (CMPH). This is usually conducted by telephone or video.

At the CMPH, an employment judge will:

• Clarify the legal issues in the case
• Set a timetable for disclosure of documents, witness statements, and the hearing itself
• Identify whether any preliminary issues need deciding first (e.g. whether the claim was filed in time)
• Make case management orders that both parties must follow

You will typically be asked to prepare a bundle of documents, a chronology, and written witness statements before the final hearing.

Stage 5: Disclosure and Document Exchange

Disclosure means sharing relevant documents with the other side. This includes documents that support your case and documents that undermine it. You cannot cherry-pick.

Employment tribunals take disclosure obligations seriously. Failing to disclose a key document, or destroying documents after a claim has been made, can result in an adverse inference: the tribunal assumes the document would have helped the claimant.

What to disclose:

• Employment contracts and written terms
• Policies relevant to the claim (disciplinary, grievance, redundancy, etc.)
• Meeting notes, investigation records, and decision letters
• Emails and messages relevant to the events
• Payslips, if pay is in dispute

Organise everything into a single paginated bundle. The tribunal expects a clear, indexed document set.

Stage 6: Witness Statements

Each side prepares written witness statements for anyone who will give evidence at the hearing. Statements are exchanged simultaneously, usually four to six weeks before the hearing.

Your witness statements should:

• Cover events in chronological order
• Reference specific page numbers in the document bundle
• Be factual, not argumentative
• Address the key issues identified at the CMPH

The quality of your witness statements often determines the outcome. A well-prepared statement that is consistent with the documentary evidence is your strongest asset. Vague recollections with no supporting documents are your weakest.

Stage 7: The Final Hearing

The final hearing is the trial. It typically takes place in a tribunal hearing room before an employment judge, sometimes sitting with two lay members (one employer representative, one employee representative).

What happens at the hearing:

1. Opening submissions (sometimes skipped, with the judge reading into the case first)
2. The claimant's evidence: they read their statement, then you (or your representative) cross-examine them
3. Your evidence: your witnesses read their statements, then the claimant's side cross-examines them
4. Closing submissions: each side summarises their case

Hearings typically last between one and five days, depending on complexity. Simple unfair dismissal claims usually take two to three days. Discrimination claims can take longer.

Stage 8: The Judgment

The tribunal may give its decision on the day (a verbal judgment) or reserve it and send a written judgment within a few weeks.

If you lose, the tribunal will hold a separate remedy hearing to decide compensation, unless the parties agree on the amount.

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Employment Tribunal Costs: What Employers Actually Pay

Understanding the financial exposure is essential for making commercial decisions about how to handle a claim.

Legal fees: If you instruct a solicitor, expect to pay between £5,000 and £15,000 for a straightforward unfair dismissal claim through to a two-day hearing. Complex or multi-day discrimination claims can cost £20,000 to £50,000 or more.

Management time: Preparing for a tribunal consumes significant internal resource. Gathering documents, preparing witness statements, and attending the hearing typically costs 40 to 80 hours of management time.

Compensation awards: If you lose an unfair dismissal claim, the median award is around £7,000 to £13,000 (the basic award plus compensatory award). But the compensatory award is currently capped at the lower of 52 weeks' pay or £115,115 (as of April 2026). Discrimination claims have no cap at all.

ACAS uplift: If the tribunal finds you unreasonably failed to follow the ACAS Code of Practice, it can increase the award by up to 25%.

The total picture: When you combine legal fees, management time, and a potential award, the average employer facing a tribunal claim spends around £8,500 to £10,000 even if they win. Losing pushes that figure significantly higher.

Use the EmployerKit Tribunal Cost Calculator to estimate your potential exposure at employerkit.com/tools/tribunal-cost-calculator.

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How to Prepare a Strong Defence

Winning at tribunal comes down to preparation. The employers who succeed are the ones with clear documentation, consistent processes, and credible witnesses.

Document Everything in Real Time

Tribunal judges decide cases based on documents, not memory. The employer with a contemporaneous paper trail wins far more often than the employer relying on recollections of what was said in a meeting six months ago.

For every significant workplace event, create a written record at the time: meeting notes, decision rationale, letters confirming outcomes. If you followed a redundancy process, make sure each consultation meeting was documented.

Follow Your Own Policies

Nothing undermines your case faster than evidence that you did not follow your own procedures. If your handbook says you will hold an investigation before a disciplinary hearing, hold the investigation. If your policy requires a right of appeal, offer the appeal.

Tribunals are far more forgiving of an imperfect process that was genuinely followed than a perfect policy that was ignored.

Choose Your Witnesses Carefully

Your witnesses need to be the people who made the relevant decisions and saw the relevant events. Do not put forward a senior manager who was not involved just because they present well. The other side will cross-examine them, and a response of "I was not involved in that decision" is damaging.

Prepare your witnesses thoroughly. They should know the bundle, know their statement, and understand they will be challenged.

Consider Settlement at Every Stage

Most tribunal claims settle before the hearing. There is no shame in settling, and it is often the commercially rational decision.

The key question is always: what is the cost of settling now versus the cost (including risk) of proceeding to a hearing? A settlement agreement can bring finality and confidentiality that a tribunal judgment cannot.

Understand the Burden of Proof

In unfair dismissal claims, you must show: (a) the reason for dismissal was a potentially fair reason (conduct, capability, redundancy, etc.), and (b) you acted reasonably in treating that reason as sufficient to dismiss. The tribunal will not substitute its own view, but it will scrutinise your process.

In discrimination claims, the burden initially falls on the claimant to establish facts from which the tribunal could conclude discrimination occurred. If they succeed, the burden shifts to you to prove a non-discriminatory explanation.

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What Happens If You Lose

If the tribunal finds against you, several things follow:

Compensation: The tribunal calculates the basic award (based on age, length of service, and weekly pay) and the compensatory award (actual financial loss flowing from the dismissal). Additional awards may apply for failure to follow the ACAS Code or for failing to provide written reasons for dismissal.

No automatic costs order: Unlike the civil courts, employment tribunals do not routinely order the losing party to pay the winner's legal costs. Costs orders are rare and reserved for cases where a party has acted vexatiously, abusively, or unreasonably. This means you will usually bear your own legal costs regardless of the outcome.

Reinstatement or re-engagement: The tribunal can order you to give the claimant their job back (reinstatement) or re-employ them in a comparable role (re-engagement). In practice, these orders are rare.

Enforcement: If you do not pay an award, the claimant can enforce it through the county court or ask HMRC to pursue it through the penalty regime.

The wider impact: A public tribunal judgment is on the public record. Prospective employees, clients, and competitors can read it. The reputational cost of a damaging finding can exceed the financial award.

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Constructive Dismissal Claims: A Special Risk

If an employee resigns and claims you fundamentally breached their employment contract, they may bring a constructive dismissal claim. These claims are notoriously unpredictable because the tribunal must assess whether your conduct was serious enough to amount to a repudiatory breach.

Common triggers include: unilateral changes to pay or role, failure to address grievances, bullying or harassment left unchecked, and a breakdown of mutual trust and confidence.

The best defence against constructive dismissal claims is to take internal complaints seriously and address them promptly. An employee who resigns after a grievance was properly investigated and handled is far less likely to succeed at tribunal than one who resigned because their complaint was ignored.

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Frequently Asked Questions

Q: How long does the employment tribunal process take from start to finish?

A: The typical timeline from receiving an ET1 to a final hearing is 6 to 12 months for straightforward claims. Complex discrimination or whistleblowing cases can take 12 to 18 months. Regional backlogs affect timing, and some tribunals are currently listing cases 9 to 12 months ahead.

Q: Can I recover my legal costs if I win at tribunal?

A: Almost certainly not. Employment tribunals only award costs where a party has acted vexatiously, abusively, disruptively, or otherwise unreasonably. Winning your case does not entitle you to a costs order. In the vast majority of cases, you will bear your own legal fees regardless of the outcome.

Q: Do I need a solicitor to represent me at an employment tribunal?

A: There is no legal requirement to use a solicitor. Some employers, particularly those with strong HR functions, represent themselves successfully. However, for claims involving discrimination, whistleblowing, or complex factual disputes, legal representation significantly improves your chances. Many employers use a solicitor for preparation and an employment barrister for the hearing itself.

Q: What is the maximum compensation a tribunal can award?

A: For unfair dismissal, the compensatory award is currently capped at the lower of 52 weeks' gross pay or £115,115 (2025/26 figure, updated annually). There is also a basic award calculated like a statutory redundancy payment. Discrimination claims have no compensation cap, and awards can run into six figures for serious cases involving significant injury to feelings and career loss.

Q: Can I settle a claim after the ET1 has been filed?

A: Yes. Claims can be settled at any point, right up to and during the hearing itself. Settlement can happen through ACAS (a COT3 agreement) or through a private settlement agreement. In practice, many claims settle in the weeks before the hearing when both sides confront the reality of their preparation and the risks involved.

Q: What should I do in the first 48 hours after receiving a tribunal claim?

A: First, note the 28-day deadline for your ET3 response. Second, preserve all relevant documents immediately: emails, meeting notes, policies, personnel files. Issue a document preservation notice to anyone involved. Third, decide whether you need legal advice and, if so, instruct a solicitor quickly so they have maximum time to prepare your response. Fourth, begin gathering your chronology of events. Do not discuss the claim with witnesses in a way that could be seen as coordinating evidence.

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Protect Your Business Before a Claim Lands

The best tribunal defence is a compliant paper trail. The EmployerKit Audit checks your employment documents against current law before a claim ever lands. From £49. Visit employerkit.com/tools/employerkit-audit.

Most tribunal claims are won or lost long before the hearing, in the decisions you made, the processes you followed, and the records you kept. The employers who fare best at tribunal are not the ones who hire the best lawyers. They are the ones who ran a fair process and can prove it.