Form N258A UK: Detailed Assessment Request Guide
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When a case has been funded through legal aid, the costs incurred by the solicitor need to be checked and approved before payment is released. This process is called detailed assessment, and Form N258A is the document used to start it off at court when the funding came through the Legal Aid Agency (historically the Legal Services Commission).
It is a procedural step rather than a contested hearing in most instances, but it still requires careful preparation and a bundle of supporting paperwork. If you are a solicitor, costs draftsperson, or litigant trying to make sense of what needs to go in the bundle, this guide walks through what Form N258A is for, what you need to include, and how the assessment hearing typically plays out in the Senior Courts Costs Office or county court.
What this document is
Form N258A is the request form used to ask a court to carry out a detailed assessment of costs in a publicly funded case, where the paying party is effectively the Legal Aid Agency rather than a private opponent. Detailed assessment itself is the formal court procedure for checking whether the costs claimed by a solicitor are reasonable and properly incurred.
It is used where costs cannot simply be agreed between the parties or summarily assessed by the judge at the end of a hearing. The form triggers the court process, sets out who the parties were, identifies the claim, and is accompanied by a bundle of documents that allow a costs officer or judge to work through the bill line by line.
Once lodged, the court will either deal with the assessment on paper (a provisional assessment in some cases) or list it for a hearing where the solicitor can attend to address any points the assessor raises.
How to use this document
- Confirm legal aid funding is in place. Check that the case was funded by the Legal Aid Agency and that you hold a valid civil legal aid certificate covering the work. Form N258A is specifically for publicly funded costs, so if the costs are payable by a private opponent, a different form (N258) applies instead.
- Prepare the bill of costs. Draft a detailed bill of costs setting out the work done, the time spent, the grade of fee earner, and any disbursements. The bill must comply with the Civil Procedure Rules and the relevant practice directions on format. This is usually prepared by a costs draftsperson or specialist costs lawyer.
- Gather the supporting bundle. Assemble the documents that must accompany the form, including the document showing the right to detailed assessment (usually the final order), copies of any costs orders made during the proceedings, fee notes, disbursement receipts, the legal aid certificates, and a statement of the parties who should be notified of the hearing.
- Complete and lodge Form N258A at court. Fill in the court name, claim number, parties, and details of the assessment being requested. Indicate whether the receiving party wants to attend a hearing and the estimated time needed. Lodge the form and bundle at the appropriate court, which will often be the Senior Courts Costs Office for higher value or complex matters.
- Attend the assessment or respond to the provisional outcome. The court will either assess the bill on paper and send out a provisional figure, or list a hearing. If a hearing is held, the costs lawyer or solicitor attends to address any reductions proposed by the costs officer. Once assessed, a final certificate is issued so the Legal Aid Agency can process payment.
Common questions
Q What is the difference between Form N258 and Form N258A?
Form N258 is used where costs are being assessed between parties, for example where the losing side has been ordered to pay the winner's costs. Form N258A is the specific version for publicly funded cases, where the costs are being claimed from the Legal Aid Agency under a legal aid certificate. The supporting paperwork and assessment rules differ, so using the correct form matters.
Q Who typically prepares and lodges Form N258A?
In practice, the form and accompanying bill of costs are usually prepared by the solicitor who conducted the case or by a specialist costs draftsperson or costs lawyer instructed by that firm. The receiving party (the legally aided client's solicitor) is responsible for getting the papers in order and lodging them at the correct court within the time limits set by the rules.
Q Is there a time limit for starting a detailed assessment?
Yes. The Civil Procedure Rules set out time limits for starting detailed assessment proceedings, generally running from the date of the judgment or order that gives the right to assessment. Missing the deadline can lead to costs sanctions or a reduced award, so it is important to diarise the date as soon as the final order is made and act promptly.
Q Will there always be a hearing?
Not necessarily. Many detailed assessments in legal aid cases are dealt with on paper by a costs officer, who works through the bill and issues a proposed outcome. A hearing is more likely where the bill is substantial, where the costs officer raises significant queries, or where the receiving party wishes to challenge proposed reductions. The form asks you to indicate whether a hearing is wanted.
Q What happens after the assessment is completed?
Once the court has carried out the assessment, a final costs certificate is issued confirming the amount allowed. This certificate is then used to claim payment from the Legal Aid Agency under the relevant funding arrangements. If any party is unhappy with the outcome, there are limited routes to request a review or appeal, generally within tight time limits.
Q Can a litigant in person use Form N258A?
Form N258A is designed for use where work has been carried out under a legal aid certificate, which in almost all cases means the work was done by a solicitor's firm or authorised provider. A litigant in person is unlikely to be the one completing this form, although they may be notified of the assessment if they were a party to the proceedings and are entitled to be heard.
Q What if fees or court charges have changed since the case started?
Court fees and legal aid rates are updated from time to time. The assessment will apply the rates and rules that were in force during the relevant period of work. Always check gov.uk for the current court fee amounts before lodging the form, as an admin or filing fee may apply when the request is submitted.
Sources
This guide is based on primary UK law and official guidance.
- Guidance · UK GovForm N258A on gov.ukgov.uk
- Guidance · HMCTSCivil Procedure Rules Part 47 (Detailed Assessment)justice.gov.uk
- Guidance · UK GovLegal Aid Agency guidancegov.uk
- Guidance · HMCTSSenior Courts Costs Officegov.uk
Legal disclaimer
This article is for general information only. It is a tool to help you find your way — not legal advice, and not a substitute for speaking to a qualified adviser about your situation.