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Detailed assessment definition

What does Detailed assessment mean? The court process for calculating how much one party must pay another after a costs order, by scrutinising a bill of costs and allowing only costs that are reasonably incurred and proportionate. In England and Wales, detailed assessment is a formal procedure under the Civil Procedure Rules (notably CPR Part 47 and associated Practice Directions). It commonly follows an inter partes costs order or a solicitor–client costs challenge. The receiving party serves a bill of costs; the paying party serves points of dispute; replies may follow. A costs judge or district judge then assesses the items (often provisionally on the...

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CPR 47 detailed assessment: applying for, obtaining and enforcing interim and final costs certificates (including solicitor–client assessments) — England and Wales

Practice notes
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What is an interim Costs certificate?

An interim costs certificate is a certificate made by the court once the Receiving party has lodged a request for a Detailed assessment hearing (CPR 47.16(1)). The prescribed template is Form N257 (CPR PD 47, para 16.10). Unless the court directs otherwise, the interim certificate will ordinarily contain an order to pay the related costs. The court retains full discretion to grant an interim certificate for a suitable amount, and there is no need for any costs to be assessed or agreed in advance.

Application for an interim costs certificate

You may apply for an interim costs certificate after filing a request for a detailed assessment hearing with the court (CPR 47.16(1)). Applications must comply with CPR 23 (CPR PD 47, para 15). For general guidance on applications, see Practice Note: How to make an application for a court order (CPR 23).

Filing and Listing an application for an interim costs certificate

File the application at the correct office(s). See Practice Note: Detailed assessment—what is it, who does it and where?—The appropriate office for applications and...

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Web page updated on 21/05/2026

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