What Is the Limitation Period for Constructive Dismissal Claims?

Constructive dismissal occurs when an employee resigns because their employer has committed a serious breach of contract. Although the employee resigns voluntarily, the law treats the resignation as a dismissal if the employer's conduct is sufficiently serious.

Constructive dismissal claims are brought in the employment tribunal under the Employment Rights Act 1996. Like other tribunal claims, they are subject to strict time limits. These deadlines are short and strictly enforced, and missing them will usually prevent the claim from being heard.

What Counts as Constructive Dismissal?

Constructive dismissal is not a separate legal claim in itself. It is a form of unfair dismissal.

It arises where:

• The employer commits a fundamental breach of contract
• The employee resigns in response to that breach
• The employee does not delay too long before resigning

Common examples of potential breaches include:

• Serious bullying or harassment
• Significant reduction in pay or hours without agreement
• Failure to address grievances about working conditions
• Imposed unreasonable changes to duties or location
• Breach of mutual trust and confidence

The resignation must be directly linked to the employer's conduct.

Standard Limitation Period for Constructive Dismissal Claims

The time limit for bringing a constructive dismissal claim is:

3 months minus 1 day from the effective date of termination (EDT).

In constructive dismissal cases, the EDT is usually:

The date the employee resigns (their last day of employment).

This is because resignation is treated as the act that ends the employment relationship, even though it is caused by the employer's breach.

When the Time Limit Starts

The limitation period begins on the EDT, which is typically:

• The resignation date stated in the notice
• The last working day if notice is worked
• The date immediate resignation takes effect if no notice is given

The key legal point is that the clock starts when employment ends, not when the employer's misconduct began.

This is important because the employer's conduct may have occurred over weeks or months before resignation, but the limitation period still runs from the resignation date.

ACAS Early Conciliation and Time Limits

Before submitting a tribunal claim, the claimant must notify ACAS and go through Early Conciliation.

Effect on limitation period

ACAS Early Conciliation affects the deadline as follows:

• The limitation clock is paused when ACAS is notified
• The pause continues during conciliation
• The clock resumes when the ACAS certificate is issued

This pause is automatic and applies to constructive dismissal claims.

Minimum time after ACAS certificate

If the limitation period would otherwise expire during conciliation:

• The claimant generally has at least 1 month from the ACAS certificate date to submit the claim

Example of How the Time Limit Works

• Employee resigns: 1 April
• EDT: 1 April
• Standard deadline: 30 June (3 months minus 1 day)

If ACAS is notified on 15 May:

• Time is paused on 15 May
• Remaining time is carried forward
• New deadline is extended based on time left when ACAS was contacted

This means the final deadline is not fixed until ACAS conciliation ends.

Why Timing Is Critical in Constructive Dismissal Cases

Constructive dismissal claims are particularly sensitive to timing because:

1. Delay before resignation can weaken the claim

If an employee waits too long after a serious breach, tribunals may find they accepted the breach.

2. Delay after resignation affects limitation

Even after resignation, the tribunal claim must still be filed within the statutory time limit.

3. Evidence becomes harder to rely on

Emails, witness recollections, and workplace records may become less reliable over time.

Extension of Time in Exceptional Cases

Tribunals can extend time in limited circumstances, but this is not common.

For constructive dismissal claims, extensions may be considered where:

• It was not reasonably practicable to bring the claim in time
• ACAS Early Conciliation timing affected the deadline
• Exceptional procedural issues prevented filing

However, tribunals apply these exceptions strictly, and late claims are usually rejected.

Relationship with Unfair Dismissal Claims

Constructive dismissal claims are treated as unfair dismissal claims for limitation purposes.

This means:

• The same 3-month minus 1-day rule applies
• The same ACAS Early Conciliation requirement applies
• The same tribunal procedures apply

The only difference is how termination occurs (resignation instead of employer dismissal).

Common Legal Issues Affecting Limitation Periods

1. Identifying the correct resignation date

The EDT is crucial and may be disputed if notice is unclear or withdrawn.

2. Ongoing employer conduct

Even if the employer's behaviour lasted for months, the limitation period still starts at resignation.

3. Internal grievance procedures

Raising a grievance does not pause or extend the limitation period.

4. ACAS timing errors

If ACAS is contacted after the limitation period expires, the claim is usually out of time.

Consequences of Missing the Deadline

If a constructive dismissal claim is submitted late:

• The tribunal will usually reject the claim
• The claim may only proceed if a rare extension is granted
• The employer can rely on limitation as a complete defence

Time limits are a preliminary issue and are often decided before the merits of the case are considered.

Practical Steps to Protect Time Limits

To reduce risk of missing the deadline:

• Identify the resignation date clearly
• Treat resignation as the starting point for limitation
• Contact ACAS as early as possible
• Record all key dates (breach, grievance, resignation, ACAS certificate)
• Prepare and submit the tribunal claim promptly after ACAS conciliation ends

Key Takeaways

The limitation period for constructive dismissal claims in England and Wales is 3 months minus 1 day from the effective date of termination, which is usually the employee's resignation date. ACAS Early Conciliation pauses the limitation clock but does not restart it. Because tribunals apply time limits strictly, late claims are rarely accepted, making early action essential.