Understanding part 36 offer costs consequences is essential for any litigator seeking to manage risk, maximise recovery, or protect their client from adverse exposure. Part 36 remains one of the most powerful procedural tools within the Civil Procedure Rules, capable of fundamentally shifting the costs landscape depending on whether an offer is beaten, accepted, or ignored.

For legal practitioners, the strategic handling of Part 36 offers is not simply about settlement positioning. It is about anticipating how the court will approach costs from the date of expiry of the relevant period and ensuring that the consequences are fully understood before trial risk crystallises.

This guide sets out the key principles governing claimant’s Part 36 and defendant’s Part 36 offers, with a focus on practical costs implications.

 

The Framework: How Part 36 Works

Part 36 is a self-contained procedural code designed to encourage settlement. It applies to both claimants and defendants making formal offers to settle and creates automatic consequences where specific thresholds are met.

The central question in most disputes concerning Part 36 offer costs consequences is whether a party has obtained a result more advantageous than the offer.

The structure is straightforward:

• A compliant Part 36 offer must specify a relevant period (usually 21 days).
• If the offer is accepted within the relevant period, standard costs consequences follow.
• If the relevant period expired and the offer is not accepted, enhanced or adverse consequences may apply depending on the outcome at trial.

The true power of Part 36 lies in what happens after that relevant period expires.

 

Claimant’s Part 36: When the Defendant Fails to Beat the Offer

Where a claimant makes a compliant offer and subsequently obtains a judgment more advantageous than the proposals contained in a claimant’s Part 36, the consequences are significant.

If the court concludes that the judgment against the defendant is more advantageous than the claimant’s Part 36 offer, CPR 36.17 requires the court (unless unjust) to award:

• Interest on damages at a rate not exceeding 10% above base rate
• Costs on the indemnity basis from the date of expiry of the relevant period
• Interest on those costs, again at a rate not exceeding 10% above base rate
• An additional amount calculated by reference to the damages awarded

This is often described as the “Part 36 uplift”.

Importantly, the court will compare the judgment sum with the settlement offer. The test is whether the judgment is more advantageous to the claimant than the offer itself. Even marginal differences can trigger these enhanced consequences.

For costs practitioners, the shift from standard to indemnity basis is often the most commercially significant element.

 

Defendant’s Part 36: When the Claimant Fails to Obtain a Better Result

The consequences operate differently when the defendant makes the offer.

If a claimant fails to obtain a judgment more advantageous than the defendant’s Part 36, the default position is that:

• The claimant is entitled to costs up to the date of expiry of the relevant period;
• The defendant is entitled to costs from the date of expiry of the relevant period;
• Interest may be awarded on those costs.

In practical terms, once the relevant period expires, the claimant becomes exposed to paying the defendant’s costs from that point forward.

This scenario frequently arises where a claimant fails to obtain the level of damages anticipated. Even where liability is established, failing to beat a defendant’s Part 36 offer can significantly erode or eliminate net recovery.

For those advising claimants, understanding the risk where a claimant fails to obtain a better result than a defendant’s offer is central to litigation strategy.

 

Acceptance Within the Relevant Period

Where an offer is accepted within the relevant period, the consequences are generally predictable.

If a claimant’s Part 36 offer is accepted within the relevant period, the defendant will usually pay the claimant’s costs up to the date of acceptance on the standard basis.

Similarly, where a defendant’s Part 36 offer is accepted within the relevant period, the claimant will ordinarily recover costs up to that point, unless the offer itself specifies otherwise.

The phrase “offer is accepted within the relevant period” carries substantial importance. Acceptance outside that period often requires court permission and may alter the costs consequences.

 

The Significance of the Relevant Period

The date of expiry of the relevant period is a critical dividing line in costs analysis.

Once the relevant period expires, the court may:

• Order the date of expiry of the relevant period to mark the point at which indemnity costs apply (in claimant-success scenarios);
• Order a claimant to pay the date of expiry of the relevant period onward in defendant-success scenarios.

The language used in orders frequently reflects this shift. Practitioners should ensure that draft orders clearly identify the date from which different costs bases apply.

 

Indemnity Basis vs Standard Basis

A key element of part 36 offer costs consequences is the transition from standard basis to indemnity basis assessment.

On the standard basis, costs are assessed as proportionate to the matters in issue, with doubt resolved in favour of the paying party.

On the indemnity basis, proportionality falls away. Doubt is resolved in favour of the receiving party. This distinction often results in materially higher recovery.

Where a claimant secures a judgment more advantageous than their own Part 36 offer, indemnity basis assessment from the date of expiry of the relevant period can significantly increase recoverable sums.

For paying parties, this exposure should never be underestimated.

 

Interest Consequences and the Base Rate

Interest enhancements are another major component of Part 36 consequences.

The court may award interest on those costs at a rate not exceeding 10% above base rate. Similarly, interest on damages may be increased.

While the court retains discretion, the starting point under CPR 36.17 strongly favours applying enhanced interest unless it is unjust.

This can materially increase the overall liability in high-value litigation.

 

Strategic Considerations for Practitioners

Part 36 offers are not merely procedural formalities. They are tactical instruments.

When advising on offers to settle, practitioners should consider:

• The evidential strength of the claim or defence
• Likely valuation at trial
• The risk of failing to obtain a judgment more advantageous than the offer
• The potential impact of indemnity basis assessment
• The financial consequences of interest uplifts

A carefully timed claimant’s Part 36 can create substantial pressure on defendants. Conversely, a well-calibrated defendant’s Part 36 can significantly limit exposure.

The consequences often turn on narrow valuation differences. A seemingly modest settlement offer can transform the costs outcome entirely.

 

When Might the Court Depart from Automatic Consequences?

Although the consequences under CPR 36.17 are expressed in mandatory terms, the court retains discretion where it would be unjust to apply them.

Factors considered may include:

• The terms of the offer
• The stage at which it was made
• The information available to the parties at the time
• The conduct of the parties

However, the threshold for injustice is high. Courts generally enforce Part 36 consequences robustly to preserve its settlement function.

 

FAQs

What are the costs consequences if a claimant beats their own Part 36 offer?
If a claimant obtains a judgment more advantageous than their own compliant Part 36 offer, the court must (unless unjust) award indemnity basis costs from the date of expiry of the relevant period, enhanced interest, and an additional amount.

What happens if a claimant fails to obtain a better result than a defendant’s Part 36?
If the claimant fails to obtain a judgment more advantageous than a defendant’s Part 36, the claimant will usually pay the defendant’s costs from the date of expiry of the relevant period, subject to interest.

Do Part 36 consequences apply automatically?
They apply unless the court considers it unjust to do so. The burden is on the party seeking to avoid the consequences.

Does acceptance within the relevant period avoid adverse costs risk?
Yes. Where an offer is accepted within the relevant period, the enhanced consequences do not arise, and costs typically follow the usual standard basis approach.

 

How Greener Costs Can Assist

Navigating part 36 offer costs consequences requires more than procedural awareness. It demands a precise understanding of how offers interact with assessment, proportionality, indemnity basis exposure, and interest uplifts.

Greener Costs advises both receiving and paying parties on the strategic deployment and forensic analysis of Part 36 offers. Whether assessing risk before trial, quantifying exposure after a relevant period expired, or drafting submissions on unjust consequences, our team ensures that cost arguments are technically robust and commercially informed.

To discuss how Greener Costs can assist with advice or drafting in matters involving Part 36 offers, please contact our team at info@greenercosts.co.uk or fill out our contact form below for a confidential, no-obligation discussion.