ET3 response deadline: what employers need to know

Employers have just 28 days to respond to an employment tribunal claim by filing an ET3 response form. Missing the deadline can leave your business unable to defend the claim, so quick, professional advice is essential.

Our employment solicitors act for employers nationwide, helping businesses prepare and submit ET3 responses, apply for extensions, and manage tribunal proceedings efficiently. Acting early protects your right to defend the claim and improves your chances of success.

What is an ET3 form

The ET3 is the employer’s formal response to an employment tribunal claim (ET1). It sets out your defence and confirms whether you contest the allegations made by the claimant. Without an ET3, the tribunal may issue a default judgment, meaning the claim is decided against you without a hearing.

The 28-day deadline

When an employee submits an ET1, the tribunal serves a copy on the employer along with a notice of claim. From the date on that letter, you have 28 days to file your ET3.

This deadline is strict. If you fail to respond in time, the tribunal can rule in favour of the employee without considering your defence. Employers often underestimate how long it takes to review the claim, gather evidence, and prepare a detailed response, so contacting a solicitor immediately is vital.

What happens if you miss the deadline

Missing the 28-day deadline is serious, but recovery may still be possible. Solicitors can apply for an extension or ask the tribunal to accept a late response. The tribunal will look at:

• Why the deadline was missed.
• How long the delay lasted.
• Whether the employer acted promptly after discovering the issue.
• Whether allowing a late ET3 would be fair to both sides.

The longer the delay, the less likely the tribunal is to grant permission, which is why acting quickly is so important.

How our solicitors can help

Our employment solicitors step in immediately to protect your business. We:

• Review the ET1 and assess the strength of the claim.
• Draft and file the ET3 response within the 28-day deadline.
• Manage disclosure, evidence, and witness preparation.
• Represent you at preliminary hearings, final hearings, and throughout the tribunal process.

We also liaise with Acas to explore early settlement options where that makes commercial sense.

Practical tips for employers when an ET1 arrives

When a tribunal claim lands, every day counts. Taking the right first steps can prevent avoidable delays and strengthen your position from the outset.

• Contact your solicitor as soon as the ET1 is received.
• Keep all correspondence and tribunal documents in a safe place.
• Gather contracts, policies, and relevant communication quickly.
• Avoid contacting the claimant directly.
• Work to an internal deadline earlier than the official one to allow time for review.

FAQs about ET3 form deadlines

Below, our employment solicitors answer common questions about ET3 timing and process.

1. Can the ET3 deadline be extended?
   
   Only in limited circumstances. The tribunal must be satisfied that there is a good reason for the delay and that granting more time is fair to both parties.
    
2. What if I submitted my ET3 late by mistake?
   
   Your solicitor can apply for the response to be accepted out of time, explaining the reasons for the delay and showing that you acted promptly once it was identified.
    
3. Can we still settle if we miss the deadline?
   
   Yes, settlement is possible at any stage, but missing the deadline weakens your position. Legal advice should be sought without delay.
    
4. What happens if I ignore the claim?
   
   If no ET3 is submitted, the tribunal may enter judgment against you without hearing your defence, which can result in compensation being awarded to the claimant to be paid by the employer.

Contact our employment solicitors for expert advice

Missing the ET3 deadline can have serious consequences, but early legal advice can keep your options open and protect your position.

Matthew Irvine, solicitor and head of employment, says:

“Missing the ET3 deadline can leave employers exposed, but acting quickly makes all the difference. We help businesses file strong, timely responses and protect their right to defend the claim.”

Our employment team acts for employers of all sizes, providing responsive, practical legal support at every stage of the tribunal process.

Get in touch to speak with our employment solicitors.