Extension Rules for Missing the Tribunal Deadline in Dismissal Cases

Employment Tribunal claims for unfair dismissal are subject to strict statutory time limits. In most cases, a claim must be presented within three months minus one day from the effective date of termination. Missing this deadline does not automatically end a claim, but it significantly restricts the ability to proceed.

Employment tribunals in England and Wales have only limited discretion to extend time. The rules differ depending on the type of claim, but unfair dismissal is treated particularly strictly compared with many other employment claims.

Standard Time Limit for Unfair Dismissal Claims

The basic limitation rule is set out in section 111 of the Employment Rights Act 1996.

A claim must be lodged:

• Within 3 months minus 1 day
• Starting from the effective date of termination (EDT)

The EDT is usually:

• The last day of employment under notice, or
• The date of summary dismissal without notice

What Happens If the Deadline Is Missed

If a claim is submitted late:

• The tribunal will normally reject it as out of time
• The respondent may apply to strike out the claim on jurisdictional grounds
• The tribunal must decide as a preliminary issue whether it has power to hear the claim

Late submission does not prevent a claim from being filed, but it creates a threshold legal issue that must be overcome before the merits are considered.

Legal Test for Extending Time in Unfair Dismissal Cases

For unfair dismissal, the tribunal's power to extend time is extremely limited.

The statutory test

Under section 111(2) Employment Rights Act 1996, a late claim may only proceed if:

1. It was not reasonably practicable for the claim to be presented in time, and
2. It was presented within a reasonable period after it became practicable to do so

This is a strict two-stage test.

Meaning of “Not Reasonably Practicable”

This is the key legal threshold. It does not mean:

• “Difficult”
• “Inconvenient”
• “Unaware of the law” (in most cases)

It generally requires a real impediment outside the claimant's control, such as:

• Serious illness preventing action during the entire limitation period
• Exceptional incapacity
• Significant procedural or legal barrier making submission impossible
• Rare cases of misleading employer conduct affecting awareness of rights

Tribunals interpret this test narrowly, and extensions are not granted routinely.

Case law consistently confirms that the test is strict and does not allow broad discretion.

Requirement to Act Within a “Reasonable Period”

Even where it was not reasonably practicable to bring the claim on time, the claimant must also show:

• The claim was submitted promptly once it became possible

Delays after the obstacle is removed can independently defeat an extension request.

Common Situations Where Extensions Are Refused

Tribunals frequently refuse late unfair dismissal claims where delay arises from:

• Ongoing grievance or internal appeal processes
• Waiting for advice without urgent action
• Mistakes about the deadline or ignorance of time limits
• Computer, postal, or administrative issues near the deadline
• Misunderstanding the effective date of termination

Even where circumstances are sympathetic, tribunals often conclude that it was still reasonably practicable to submit the claim in time.

ACAS Early Conciliation and Late Claims

ACAS early conciliation affects timing but does not generally rescue a claim that is already out of time.

Key rules:

• The limitation period is paused only if ACAS is notified within the original time limit
• If notification occurs after expiry, there is no revival of the claim
• After conciliation, any remaining time is carried forward, often with a minimum of one month

Early conciliation is therefore relevant to calculation, but not a general remedy for missing deadlines.

Tribunal Approach to Extension Requests

When considering whether to allow a late unfair dismissal claim, tribunals typically:

• Treat time limits as jurisdictional thresholds
• Examine factual evidence closely
• Apply a strict interpretation of “reasonably practicable”
• Consider whether the claimant acted promptly at all stages
• Refuse extensions where delay could reasonably have been avoided

The overall approach is significantly stricter than for discrimination claims, where a broader “just and equitable” test applies.

Burden of Proof

The claimant carries the burden of proving:

• Why it was not reasonably practicable to submit the claim in time
• When it first became possible to submit the claim
• That submission occurred within a reasonable time thereafter

If evidence is unclear or incomplete, the tribunal will usually refuse the extension.

Practical Consequences of Missing the Deadline

If the extension test is not satisfied:

• The tribunal lacks jurisdiction to hear the unfair dismissal claim
• The claim is dismissed without consideration of merits
• Compensation for dismissal becomes unavailable through the tribunal route
• Related claims may also be affected depending on their own limitation rules

Key Differences: Unfair Dismissal vs Other Claims

• Unfair dismissal: strict “not reasonably practicable” test
• Discrimination claims: broader “just and equitable” extension test
• Wages claims: separate limitation rules with different extension principles

This distinction is important because some claims in the same case may still proceed even if the dismissal claim is out of time.

Key Takeaways

• Unfair dismissal claims must usually be filed within 3 months minus 1 day of termination
• Late claims are only allowed if it was not reasonably practicable to file on time
• The claimant must also show filing occurred within a reasonable time after becoming able to act
• Tribunals apply a strict approach and rarely grant extensions
• ACAS early conciliation does not generally revive an expired limitation period
• Missing the deadline usually prevents the claim from proceeding