# The Capital Buffers and Macro-prudential Measures Regulations 2025, Regulation 20: Calculation of buffer


(1) The PRA must require a relevant O-SII to calculate its O-SII buffer by applying the buffer rate set for it under regulation 18 to all its exposures.
(2) For the purposes of the calculation required under paragraph (1), the PRA must require the relevant O-SII to—
(a) determine the value of its exposures by applying the level of consolidation selected by the PRA under Step 1 of regulation 18(2), and
(b) apply the buffer rate equally to all exposures regardless of where they are located.

---
Source: https://www.legislation.gov.uk/uksi/2025/653/regulation/20 (the official version)
Page: https://openlegislation.uk/capital-buffers-and-macro-prudential-measures-regulations-2025/regulation-20
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.