On 20 January 2026, the PRA published PS1/26, finalising Basel 3.1 rules and related policy materials. The package largely confirms the near-final policy, with minor clarifications. This article provides an overview of the final rules. This article provides an overview of the final UK Basel 3.1 rules.

This article outlines the key changes to the calculation of Credit valuation adjustment and counterparty credit risk, as part of the Basel 3.1 final rules (PS1/26).

This article highlights the key changes to real estate exposures under the standardised approach to credit risk, as set out in the final Basel 3.1 rules (PS1/26).

This article highlights the key changes to the calculation of own funds requirement for operational risk, as set out in the final Basel 3.1 rules (PS1/26).

This article highlights the key changes to exposures to corporates under the standardised approach to credit risk, as set out in the final Basel 3.1 rules (PS1/26).

This article highlights the key changes to the retail exposure class under the standardised approach to credit risk, as set out in the final Basel 3.1 rules (PS1/26).

This article outlines the changes relating to exposures to institutions under the standardised approach of credit risk, as part of the Basel 3.1 final rules (PS1/26).

This article outlines the key changes to the calculation of market risk capital requirements as part of the Basel 3.1 final rules (PS1/26).

This article highlights the key changes to exposures and default under the standardised approach to credit risk, as set out in the final Basel 3.1 rules (PS1/26).

This article outlines the reporting changes, as set out in the final Basel 3.1 rules (PS1/26).

On 20 January 2026, the PRA published PS4/26, finalising SDDT rules and related policy materials. The package largely confirms the near-final policy, with minor clarifications. This article provides an overview of the final rules.

The Prudential Regulation Authority (PRA) has published its final Policy Statement PS25/25 and SS 5/25 on climate-related financial risks on 3 December 2025.

We have broken down the Supervisory Statement into a set of 41 expectations that non-systemic banks will need to proportionately consider.

The PRA’s PS27/25, part of its wider FBD programme, finalises CP21/25 proposals by confirming the deletion of 37 banking reporting templates and the consolidation of FINREP rules to simplify prudential reporting, reduce costs, and modernise the UK regulatory data framework.

On 3 December 2025, the PRA published its final Policy Statement PS25/25 on climate-related financial risks. The final expectations now sit in Supervisory Statement SS5/25 ‘Enhancing banks’ and insurers’ approaches to managing climate-related risks’, which immediately replaces the old SS3/19. The changes enhance requirements in areas such as governance, risk management, scenario analysis, data, and disclosure.

Firms are required to hold regulatory capital to absorb losses. However, banks in the UK often feel that they are holding heightened levels of regulatory capital, which is stifling their potential for evolution and expansion. 

The latest Policy Statement from the regulator near-finalises the retirement of the refined methodology for Pillar 2A capital, and embeds some non-substantive changes on pension obligation risk and interest rate risk in the banking book.

Katalysys recently hosted a roundtable in collaboration with UK Finance and representatives from the PRA, where we discussed the practical challenges firms are facing in preparing for implementation. Based on those discussions and our ongoing work supporting several institutions with Basel 3.1 readiness, we have produced a white paper focusing on the key areas of implementation that carry the greatest risk.

Hosted by UK Finance, Katalysys is pleased to announce a training programme, “The Basel Breakthrough: Future-Proofing Regulatory Reporting for 2027”, aimed at equipping banks and financial institutions with the knowledge, tools and strategies to navigate the forthcoming Basel 3.1 reforms.

As part of PS9/24, the PRA announced an off-cycle review of Pillar 2 capital requirements to address double-counting, rebase Pillar 2A, and mitigate unintended impacts from changes in Pillar 1 RWAs. Although delayed, the process has now resumed with revised reference dates. Firms must provide specified information as at 31 December 2025, with submissions due by 31 March 2026.

Liquidity stress testing remains a cornerstone of effective risk management and regulatory compliance for banks. However, a persistent challenge lies in interpreting what constitutes a “severe but plausible” stress scenario, particularly in the context of evolving depositor behaviours and increasing digitalisation of banking.

This paper aims to address this challenge by examining how stress scenarios can be robustly calibrated using empirical evidence backed by statistical methods, with particular focus on liquidity stress testing informing the Internal Liquidity Adequacy Assessment Process (ILAAP).