PRA publishes final rules for Basel 3.1, with 1 January 2027 start date
The Prudential Regulation Authority has published final policy, rules, and supervisory expectations implementing Basel 3.1 and setting the capital that banks and building societies must hold. The new regime will take effect from 1 January 2027, giving firms time to prepare. The Fundamental Review of the Trading Book (FRTB), and specifically the use of internal models by firms to calculate capital for market risk, will remain outstanding as the PRA considers developments in other jurisdictions.