In the case of Magomedov & Ors v Rabinovich & Ors [2026] EWHC 962 (SCCO), Costs Judge Brown considered an “unusual application” concerning whether the SCCO had jurisdiction to order security for costs in detailed assessment proceedings.
Background Facts
Following the substantive claim, the Applicants (Defendants in the original claim) served Notice of Commencement of Detailed Assessment and a Bill of Costs totalling £4.2million, pursuant to four costs orders made in their favour. No request for detailed assessment was made, and Points of Dispute had not been served. Also, interim payments totalling £1.8 million had already been received.
The Applicants applied for an Order under CPR 25 for the Respondents (the Claimants in the original claim) to provide security for the costs of detailed assessment proceedings. The Respondents opposed the application on the basis that the SCCO lacked jurisdiction to consider the application because its powers were limited to those set out in CPR 47, which provides for the court to grant an interim costs certificate ordering the paying party to pay such sum as the SCCO considers appropriate.
The Applicants sought the sum of £336,000 which was some 70% of the costs it said would be incurred of £480,000. A bill of costs had been prepared at a cost of £220,000. It was said that some £259,000 would be incurred in the assessment, assuming a three-week hearing.
The Court referred to the relevant provisions of CPR 25, specifically 25.1 which enables the court to grant an order for the security of costs as one of the interim remedies outlined in that subsection. Subsections 25.26(1) and 25.27 were also relied upon in support of the application.
The Application
The Application was dismissed. Costs Judge Brown held that, although the court hearing the substantive claim may order security for the costs of detailed assessment as part of the overall costs of the proceedings, once the substantive proceedings had concluded, the SCCO did not possess the wider jurisdiction available to the court hearing the substantive claim and was instead limited to the narrower powers under CPR Part 47.
While CPR 25.12 allows the court dealing with the substantive claim to order security for costs “after judgment”, this did not extend to subsequent detailed assessment proceedings. CPR 47 was described as a ‘self-contained code’ governing detailed assessment and did not incorporate the provisions of CPR 25.
The Court also emphasised that CPR 47 contains mechanisms that are designed to protect the receiving party and that the only interim remedy available in detailed assessment proceedings was an interim costs certificate under CPR 47.16.
The judge identified several structural reasons for declining jurisdiction, including the absence of a clear enforcement mechanism, the difficulty in identifying the “defendant” for CPR 25 purposes once the parties had become receiving and paying parties, and the risk of creating disproportionate satellite litigation.
In any event, even if jurisdiction had existed, the judge stated that the application would have been refused as a matter of discretion, particularly because the Applicants had failed to raise the issue before the court determining the substantive claim. The appropriate course for parties seeking security for the costs of detailed assessment is therefore to apply to the court dealing with the substantive proceedings, which has sufficient power to include such costs within a security for costs order.
Conclusion
The Senior Courts Costs Office (SCCO) has held for the first time that it lacks jurisdiction to order security for costs under CPR 25, which in turn highlights the fact that CPR Part 47 operates as a ‘self-contained code’.
The judgment clarifies the limit of the SCCO’s jurisdiction, confirming that powers that derive from the CPR cannot be imported into general discretion.
The key takeaway for practitioners is if an application for security for costs is required, it should be made to the court hearing the underlying claim. Once the proceedings enter the costs jurisdiction in CPR 47, the available tools to remedy matters become narrower.
Ujjaini Mistry is a Paralegal in the Costs and Litigation Funding Team at Clarion Solicitors and can be contacted on 07436 033368 or at Ujjaini.Mistry@clarionsolicitors.com.