How to Use Part 36 Offers in Commercial Litigation

Effective settlement strategy is a cornerstone of commercial litigation in England and Wales. One of the most powerful tools available to both claimants and defendants is the Part 36 offer, created by the Civil Procedure Rules (CPR). Part 36 offers encourage early and realistic settlement by imposing defined costs consequences if the offer is not beaten at trial. This article explains what Part 36 offers are, how and when they can be made, the procedural and costs consequences that flow from them, and practical strategies for their use in commercial disputes.

What Is a Part 36 Offer?

A Part 36 offer is a formal offer to settle a dispute for a specified sum or on defined terms, made under CPR Part 36. Its purpose is to encourage settlement by creating predictable cost consequences if the offer is rejected and the rejecting party fails to obtain a better outcome at trial. Part 36 offers can be made by either the claimant or the defendant, before or during court proceedings.

Key features of a Part 36 offer include:

• It must be in writing and clearly state that it is made under CPR Part 36.
• It must specify a period of at least 21 days (the “relevant period”) during which the offer can be accepted.
• It can relate to the whole claim, part of the claim, or specific issues.
• It is made without prejudice except as to costs, meaning it cannot be used to prove liability during the substantive trial but is later disclosed to determine cost orders.

Part 36 is a “self‑contained procedural code,” meaning offers outside this part (even if labelled as a settlement offer) do not attract the same consequences unless the court decides otherwise on costs.

When and How Part 36 Offers Are Used

Timing

A Part 36 offer may be made at any stage, including:

• Before proceedings begin - to encourage early settlement.
• After the claim has been issued - during disclosure, witness evidence exchanges, or before trial.

Careful timing is important: making an offer too early may signal weakness, whereas making it too late can lessen tactical advantage.

Form and Content

To be effective, a Part 36 offer must:

• Be in writing and specify it is made under Part 36 of the CPR.
• Provide the 21‑day relevant period during which it can be accepted.
• Be clear about whether it covers the entire claim, a part of the claim, or specific issues.
• Indicate whether counterclaims are included.

One key practical detail is that if the offer involves a monetary settlement, it is treated as inclusive of interest up to the end of the relevant period unless specified otherwise.

Acceptance and Effects of Part 36 Offers

A Part 36 offer can be accepted in writing by the offeree and served on the offeror within the relevant period. Once accepted:

• Proceedings are stayed on the terms of settlement.
• If the offer is monetary, the offeror must pay the agreed sum within 14 days unless another period is agreed.
• Costs up to the date of acceptance are usually recoverable by the party accepting the offer.

Acceptance terminates the dispute on the agreed terms without the need for a trial.

Costs Consequences if an Offer Is Not Accepted

The defining feature of Part 36 offers is the automatic costs consequences imposed if an offer is rejected and the rejecting party fails to obtain a better outcome at trial. These consequences differ depending on whether the offer was made by the claimant or defendant.

Defendant's Part 36 Offer

If a defendant makes a Part 36 offer and the claimant:

• Does not obtain a judgment more advantageous than the offer (even if awarded some money but less than or equal to the offer), then:
  • The claimant may be ordered to pay the defendant's costs from the end of the relevant period.
  • Interest on those costs may be ordered, typically at a rate of up to 10 % above the base rate.

This means a claimant can win on liability but still lose financially if they fail to beat the offer.

Claimant's Part 36 Offer

If a claimant makes a Part 36 offer and the defendant:

• Fails to obtain a judgment that is at least as advantageous as the claimant's offer, then the claimant may recover:
  • Costs from the end of the relevant period on an indemnity basis (a higher level than standard).
  • Interest on damages and costs at up to 10 % above base rate.
  • An additional amount calculated by reference to a percentage of the judgment up to certain caps.

These enhanced cost consequences provide a powerful incentive for the defendant to accept reasonable settlement offers.

Strategic Use of Part 36 Offers

Encouraging Settlement

Part 36 offers are most effective when used to:

• Communicate a realistic assessment of value early, reducing litigation risk.
• Pressure opponents who risk adverse costs consequences if they do not beat the offer.
• Draw a clear line on cost exposure, helping clients assess risk and reward.

In practice, tactical use may involve making incremental offers to encourage negotiation without overcommitting.

Negotiations and Counter‑Offers

Part 36 offers may be negotiated or followed by counter‑offers. A counter‑offer, if properly stated as a Part 36 offer, can itself trigger costs consequences. Parties should avoid informal settlement communications that do not comply with Part 36 formalities, as such communications do not attract the same costs framework.

Practical Considerations and Pitfalls

Strict Compliance

Part 36 rules are precise. If an offer fails to meet requirements - such as inadequate wording, insufficient relevant period or unclear terms - then its cost consequences may not apply, although the court may still consider it when making cost orders.

Track and Applicability

Part 36 does not apply to small claims track litigation. Offers in those cases may still be made, but they do not have Part 36's automatic cost consequences.

Key Takeaways

Part 36 offers under the Civil Procedure Rules are a central tactical tool in commercial litigation in England and Wales. They allow either party to make formal settlement offers at any stage, with well‑defined cost consequences if the offers are not beaten at trial. Properly structured Part 36 offers - with clear terms and compliant documentation - can encourage early settlement, limit exposure to costs, and, in some cases, produce enhanced cost and interest awards. Because of their procedural and financial impact, Part 36 offers are often integral to cost‑risk planning and dispute‑resolution strategy in complex commercial cases.

James William Steven Parker

James is the founder of UKLegalGuides.com and a former agent at the Ministry of Justice (UK). With a background in processing legal claims, he launched this platform to make the laws of England and Wales accessible to everyone.