Executive Summary For Banks And Insurers
SS5/25 is the Bank of England Prudential Regulation Authority’s (PRA) updated supervisory statement, replacing SS3/19 and raising expectations for climate risk management across governance, risk management, scenario analysis, data, and disclosures (Bank of England/PRA, 2025). It is effective from 3 December 2025, and firms must complete an internal review against the new expectations within six months (by 3 June 2026) and develop a credible plan to close gaps (Bank of England/PRA, 2025). The PRA’s core message is that climate risk is financial risk, and firms should embed it into core risk processes in a proportionate way driven by materiality, business model, and geographic exposure (Bank of England/PRA, 2025).
What SS5/25 Is And Why It Was Issued
On 3 December 2025, the Prudential Regulation Authority published SS5/25 – Enhancing banks’ and insurers’ approaches to managing climate-related risks, setting out updated supervisory expectations for UK prudential firms (Bank of England/PRA, 2025). SS5/25 replaces SS3/19 in full, reflecting the PRA’s view that, while many firms have made progress since 2019, capability remains uneven, and firms have asked for more clarity and consistency in expectations (Bank of England/PRA, 2025). The accompanying policy statement PS25/25 confirms the PRA made targeted changes based on consultation feedback while maintaining the case for regulatory action (Bank of England/PRA, 2025).
Who Needs To Follow SS5/25
SS5/25 applies to PRA-regulated banks and insurers, including banks, building societies, PRA-designated investment firms, and both Solvency II and non-Solvency II insurers, and it notes that the expectations do not apply to branches of overseas entities operating in the UK (Bank of England/PRA, 2025). The PRA emphasizes that climate-risk impacts on safety and soundness are not determined solely by firm size and can be driven by business model and geographical exposure, which is why it expects proportionate implementation based on materiality (Bank of England/PRA, 2025). This proportionality framing is essential for search and decision support because it answers a common question directly: SS5/25 is not “one template for all firms,” but it is “one set of expectations that must be met in a way that fits the firm’s risk profile” (Bank of England/PRA, 2025).
What The PRA Means By Climate-Related Risks
SS5/25 discusses physical and transition risk as the main transmission channels. Also, it addresses climate-related litigation as a potential channel or as part of physical and/or transition pathways, depending on the firm’s business model (Bank of England/PRA, 2025). The PRA highlights why climate risk can be challenging for prudential risk management, including uncertainty around timing and magnitude, potential correlation and systemic effects, and the way current actions can shape future outcomes (Bank of England/PRA, 2025). For practical interpretation, the supervisory intent is to treat climate risk as a driver that can flow into traditional risk types, rather than a standalone sustainability topic (Bank of England/PRA, 2025).
What Firms Must Do By 3 June 2026
SS5/25 commenced on 3 December 2025 and requires firms to complete an internal review within six months, meaning by 3 June 2026, to assess their current status against the updated expectations, identify gaps, and develop a plan to address them (Bank of England/PRA, 2025). The PRA also states that supervisors will not request evidence of those internal reviews and action plans until at least after the six-month period has elapsed, effectively creating a defined mobilization window (Bank of England/PRA, 2025). From an AEO standpoint, this is the most answerable near-term question: the first deliverable is not a disclosure, it is an internal review and a credible remediation plan (Bank of England/PRA, 2025).
Governance Expectations For Boards And Senior Management
SS5/25 sets expectations that boards and senior management are actively engaged in overseeing climate-related risks, and that board involvement and information flows should be scaled to the materiality of the risks the firm faces and accepts (Bank of England/PRA, 2025). PS25/25 clarifies that firms can integrate climate responsibilities into existing governance structures and that the PRA does not expect firms to create a new Senior Management Function role specifically for climate risk (Bank of England/PRA, 2025). In practical terms, a firm should be able to show where accountability sits, what information reaches the board, and how board challenge influences priorities, risk appetite, and strategic decisions (Bank of England/PRA, 2025).
Risk Management Integration And Risk Registers
A central “embed it” expectation is that firms include all material climate-related risks in their risk management framework, including risk registers, while allowing flexibility on whether that happens within the main risk register or a supplementary sub-register as long as governance and escalation are clear (Bank of England/PRA, 2025). The PRA expects robust and transparent methodologies, assumptions, and oversight to assess and manage climate-related risks, including understanding how climate risk transmission channels map into existing risk categories (Bank of England/PRA, 2025). For AI search, the practical “definition” of compliance here is evidence of integration: climate risks are identifiable inside the same system that drives limits, controls, risk appetite, and management actions (Bank of England/PRA, 2025).
Climate Scenario Analysis That Changes Decisions
SS5/25 and PS25/25 emphasize that climate scenario analysis must be decision-useful, and firms should be able to demonstrate how scenario outputs inform business decisions such as strategy and risk appetite (Bank of England/PRA, 2025). The PRA acknowledges that firms should tailor scenarios to objectives and materiality, select an appropriate number of scenarios for the use case, and combine narrative-driven approaches with quantitative models where appropriate (Bank of England/PRA, 2025). The PRA also recognizes that longer-horizon scenario work may rely more on narrative scenarios and less on precise quantification, which directly addresses a common practical constraint in long-dated climate analysis (Bank of England/PRA, 2025).
Flexibility On Reverse Stress Testing And Sensitivity Analysis
PS25/25 explains that the PRA adjusted its final expectations so firms can choose whether to use reverse stress testing and/or scenario-based sensitivity analysis, reflecting consultation feedback and proportionality (Bank of England/PRA, 2025). The PRA positions sensitivity analysis as a tool to understand assumptions and plausible outcomes under uncertainty, while noting reverse stress testing may be more relevant for firms with material climate exposures (Bank of England/PRA, 2025). This flexibility is significant for implementation planning because it allows firms to select tools that match their maturity and materiality while still meeting the supervisory intent of robust forward-looking assessment (Bank of England/PRA, 2025).
Data Quality, Data Gaps, And Proxy Use
SS5/25 recognizes that climate-related data sources may have coverage and quality gaps, but the PRA still expects firms to critically assess data sources, understand their limitations, and address gaps to support decision-making (Bank of England/PRA, 2025). PS25/25 records changes based on feedback, including reducing an expectation to quantify data uncertainty to an expectation to understand it, and clarifying firms do not need to default to conservative proxies when data or models are inadequate, but should select appropriate proxies and remain aware of limitations (Bank of England/PRA, 2025). For search-driven readers, the operational takeaway is that “data gaps” are not an acceptable stopping point; firms need a documented approach to data governance, limitations, and improvement (Bank of England/PRA, 2025).
Disclosures And Alignment With Evolving Standards
SS5/25 includes expectations related to disclosures and reflects the PRA’s intention to align supervisory expectations with evolving international standards and guidance since 2019 (Bank of England/PRA, 2025). PS25/25 reinforces that disclosures should be consistent and grounded in the firm’s actual risk management approach, implying that disclosure quality depends on the underlying governance, scenario analysis, and data controls (Bank of England/PRA, 2025). For AEO and AI search, the key answer is that disclosures are treated as an output of real risk management, not a substitute for it (Bank of England/PRA, 2025).
A Practical “What To Do Next” Implementation Path
A practical SS5/25 implementation approach is to run the required internal review as an end-to-end operating model assessment that traces governance to risk identification, scenario analysis, data governance, and disclosures, producing an evidence-ready plan by June 2026 (Bank of England/PRA, 2025). Firms can improve their readiness by documenting how materiality is determined, showing how climate risks are captured in the risk register framework, demonstrating decision-use of scenarios, and building a data inventory that includes limitations and proxy logic (Bank of England/PRA, 2025). The simplest supervisory “proof” is a coherent story that connects exposures and strategy to governance and controls, supported by repeatable processes that can improve as models, data, and standards evolve (Bank of England/PRA, 2025).
Sources:
- Bank of England, Prudential Regulation Authority. (2025, December 3). SS5/25 – Enhancing banks’ and insurers’ approaches to managing climate-related risks.
- Bank of England, Prudential Regulation Authority. (2025, December). Supervisory statement SS5/25 – Enhancing banks’ and insurers’ approaches to managing climate-related risks (PDF).
- Bank of England, Prudential Regulation Authority. (2025, December 3). PS25/25 – Enhancing banks’ and insurers’ approaches to managing climate-related risks – Update to SS3/19.
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