What is the deadline for defence?
A defence is normally due 14 days after service of the particulars of claim, or 28 days after service where the defendant files an acknowledgment of service. Select the relevant response in the calculator.
Calculate your deadline
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Worked example
- Example input
- 03/08/2026
- Expected result
- 17 August without an acknowledgment, or 1 September 2026 with one
The particulars of claim were served on Monday 3 August 2026.
The calculator applies 14 days without an acknowledgment and 28 days where one was filed. The 28-day result moves past the 31 August court closure.
How this deadline is counted
- Period
- 14 days, or 28 days where an acknowledgment of service was filed
- Trigger
- Service of the particulars of claim
- Direction
- Forward from service
- Counting method
- Clear days; the service day is excluded
All calendar days count because both periods exceed five days. A deadline ending on a court closure day moves under CPR 2.8(5).
Civil Procedure Rules Part 15. CPR 15.4. Civil Procedure Rules source checked 06/08/2026
Exceptions and matter facts
- Parties may agree an extension of up to 28 days under CPR 15.5 and must notify the court in writing.
- Different periods can apply to service outside the jurisdiction or where the court orders another date.
Deadline Engine is calculation software, not legal advice. Check the current rule, any order and the facts before adding a date to your diary.