This Practice Note provides guidance on the bill of costs which the receiving party in a detailed assessment has to complete prior to commencement of detailed assessment proceedings. Model bill of costs are set out in CPR PD 47, para 5.1 and differ depending on recovery (base costs, success fees, LSC costs). This Practice Note identifies and links through to the relevant costs precedents as well as Precedent F which contains the relevant certificates required in the bill of costs itself. There is also guidance on how to complete a bill of costs and information on using a costs draftsman. Any detailed assessment proceedings should be brought under the provisions within CPR 47 and CPR PD 47.