CPR 47 explained: the detailed assessment procedure step by step

Detailed assessment begins with service of a notice of commencement and the bill of costs on the paying party, under CPR 47.6. The notice must normally be served within three months of the judgment, order or event giving rise to the right to costs. Late service does not invalidate the bill, but the court may disallow interest or costs as a sanction.

For Part 7 multi-track claims, bills for work done after 6 April 2018 are generally required in the electronic format, Precedent S, unless the court orders otherwise. Supporting documents, such as fee notes and receipts for disbursements, must accompany the notice.

The paying party has 21 days to serve points of dispute, in the form of Precedent G. Points must be short and specific, identifying the item challenged, the reason and a suggested figure where appropriate. If points are not served, the receiving party may request a default costs certificate.

The receiving party may serve replies within 21 days of service of the points. Replies are optional but often valuable, particularly where points raise issues of principle or factual errors. They should be concise and respond only to points that require a response.

The receiving party must file a request for a detailed assessment hearing within three months of the expiry of the period for commencing proceedings. Failure can lead to an application by the paying party for an order requiring a request to be filed, and to sanctions.

Where the costs claimed are £75,000 or less, the court will normally deal with the assessment by provisional assessment on paper under CPR 47.15. Either party may request an oral review within 21 days of the provisional assessment, but there are costs risks if the party requesting it does not improve its position by 20% or more.

At an oral hearing, the court considers only the items specified in the points of dispute, unless it gives permission otherwise. Preliminary issues, such as the validity of a retainer, are usually dealt with first. The court then decides the items in turn.

After assessment, the receiving party files a completed bill, and a final costs certificate is issued. The costs of the assessment are usually payable by the paying party, subject to Part 36 and other offers. Our Costs Lawyers handle every stage, from drafting to advocacy, and you can download our free detailed assessment timetable.