Trend analysis: climate risk and financial regulation — where policy is heading in 2026 and beyond

Why It Matters

Climate-related financial losses reached $380 billion globally in 2024, making it the costliest year on record for weather and climate disasters according to Munich Re (2025). Yet the financial system's capacity to price, provision for, and manage these risks remains unevenly developed. The Network for Greening the Financial System (NGFS, 2025) estimates that a disorderly transition could reduce global GDP by up to 13 percent by 2050, with losses concentrated in financial institutions that fail to integrate climate risk into capital allocation, lending, and underwriting decisions.

Regulators are responding with an unprecedented wave of policy. By the end of 2025, over 50 jurisdictions had introduced or proposed mandatory climate-related financial disclosures, and at least 18 central banks had completed or launched climate stress tests for their banking sectors (Financial Stability Board, 2025). The policy trajectory for 2026 and beyond points toward deeper integration of climate risk into prudential supervision, mandatory transition planning, and the emergence of Pillar 1 capital requirements that explicitly account for climate exposures. For financial institutions, asset managers, and corporate issuers, understanding these regulatory vectors is no longer optional.

Key Concepts

Climate risk taxonomy distinguishes between physical risks (acute events like floods and wildfires, chronic shifts like sea-level rise) and transition risks (policy changes, technology shifts, market repricing, and reputational impacts associated with the move to a low-carbon economy). The Basel Committee on Banking Supervision (BCBS, 2024) has clarified that both risk types should be captured within existing Pillar 1 risk categories, including credit risk, market risk, and operational risk, rather than treated as a separate risk class.

Transition planning refers to the strategic roadmap a financial institution or corporation develops to align its business model with a credible pathway to net zero. The UK's Transition Plan Taskforce (TPT, 2024) published the first comprehensive disclosure framework for transition plans, requiring entities to articulate governance, strategy, engagement, and metrics across short, medium, and long-term horizons. The EU's Corporate Sustainability Reporting Directive (CSRD) and the International Sustainability Standards Board (ISSB) IFRS S2 standard both embed transition plan disclosures as core requirements.

Climate stress testing moves beyond historical loss data to model forward-looking scenarios. The European Central Bank (ECB, 2025) completed its second economy-wide climate stress test in 2025, covering 110 banks representing 75 percent of eurozone banking assets. Results showed that banks with higher exposure to carbon-intensive sectors faced potential credit losses 30 percent above baseline under a delayed transition scenario. The Bank of England's Climate Biennial Exploratory Scenario (CBES) and the Federal Reserve's pilot climate scenario analysis follow similar methodologies.

Disclosure standard interoperability addresses the challenge of multiple overlapping frameworks. The ISSB's IFRS S1 and S2 standards, effective for reporting periods beginning January 2024, are designed to serve as the global baseline. The CSRD, California's SB 253 and SB 261, and Japan's revised Financial Instruments and Exchange Act each build on or deviate from this baseline, creating a patchwork that multinational firms must navigate. The ISSB and the European Financial Reporting Advisory Group (EFRAG) published an interoperability mapping in 2024 to reduce duplication, but gaps remain, particularly around Scope 3 granularity and double materiality (EFRAG, 2024).

Trends to Watch

Trend 1: Mandatory transition plans become a regulatory norm. The UK became the first major economy to signal mandatory transition plan disclosures for listed companies and financial institutions, with the Financial Conduct Authority (FCA, 2025) publishing draft rules requiring FTSE 350 companies to disclose TPT-aligned transition plans starting in 2027. The EU's CSRD already requires transition plan disclosures under the European Sustainability Reporting Standards (ESRS), and Brazil's central bank issued guidance in late 2025 requiring banks to publish climate transition strategies. Expect at least 10 additional G20 jurisdictions to introduce mandatory or comply-or-explain transition plan requirements by 2028 (Climate Policy Initiative, 2025).

Trend 2: Pillar 1 capital requirements begin to reflect climate risk. The BCBS published its final principles for climate-related financial risk management in 2024 and is now developing technical guidance on how climate risk should be integrated into credit risk weights, market risk models, and operational risk frameworks. The ECB's 2025 supervisory priorities explicitly include assessing whether banks' internal ratings adequately capture climate-related creditworthiness deterioration. While full Pillar 1 integration will take years, early movers such as the Bank of France and the Monetary Authority of Singapore (MAS) are piloting sector-specific capital add-ons for high-carbon exposures. MAS (2025) announced that by 2027, banks with significant fossil fuel lending concentrations will face additional capital buffer requirements of 50 to 150 basis points.

Trend 3: Climate litigation shapes regulatory expectations. Climate-related litigation cases surpassed 2,700 globally by the end of 2025, with nearly 30 percent of cases targeting financial institutions or their regulators (Grantham Research Institute, 2025). Landmark rulings, including the Swiss KlimaSeniorinnen decision at the European Court of Human Rights and the Dutch Milieudefensie v. Shell appeal, are establishing legal precedents that regulators use to justify tighter supervisory expectations. In the financial sector, cases like ClientEarth v. Board of Directors of Shell (2024) and derivative actions against bank directors for inadequate climate risk oversight are raising the bar for fiduciary duty. Financial institutions should expect litigation risk to function as a de facto enforcement mechanism alongside formal regulation.

Trend 4: Central bank climate scenario analysis becomes routine. Beyond one-off stress tests, central banks are embedding climate scenario analysis into regular supervisory cycles. The ECB now requires climate risk to be integrated into banks' Internal Capital Adequacy Assessment Processes (ICAAP) and Internal Liquidity Adequacy Assessment Processes (ILAAP) on a permanent basis (ECB, 2025). The Reserve Bank of Australia published its first climate vulnerability assessment in 2025, while the People's Bank of China expanded its pilot climate stress tests from five banks to 21. The NGFS (2025) released updated short-term scenario models that allow supervisors to evaluate risks over one to five year horizons, complementing the existing long-term (30-year) scenarios.

Trend 5: Scope 3 financed emissions become the regulatory frontier. While Scope 1 and 2 emissions reporting is increasingly standardized, financed emissions (Scope 3, Category 15) remain the most challenging and consequential metric for financial institutions. The Partnership for Carbon Accounting Financials (PCAF, 2025) reported that over 530 financial institutions representing $98 trillion in assets have committed to measuring and disclosing financed emissions. Regulatory pressure is mounting: the CSRD requires financed emissions disclosure, the FCA's proposed Sustainability Disclosure Requirements (SDR) include financed emissions metrics, and California's SB 253 mandates Scope 3 reporting for large companies operating in the state. The data challenge is significant, with PCAF noting that over 60 percent of financed emissions calculations still rely on estimated rather than reported data, but the direction of travel is clear.

Trend 6: Greenwashing enforcement intensifies. Regulators are moving from guidance to enforcement on sustainability claims. The European Securities and Markets Authority (ESMA, 2025) launched coordinated supervisory actions on ESG fund naming and marketing, resulting in over EUR 70 million in fines and fund reclassifications across 15 jurisdictions. The US Securities and Exchange Commission (SEC) issued enforcement actions against three asset managers for misleading ESG integration claims in 2024 and 2025. The EU's Green Claims Directive, expected to enter force in 2026, will require companies to substantiate all environmental claims with verified evidence and standardized methodologies. Financial institutions marketing green bonds, sustainability-linked loans, or ESG funds will face heightened scrutiny.

Key Players

Established Leaders

• Network for Greening the Financial System (NGFS) — Coalition of 134 central banks and supervisors driving climate risk integration into financial supervision; publishes the most widely used climate scenarios.
• International Sustainability Standards Board (ISSB) — Sets the global baseline for sustainability-related financial disclosures under IFRS S1 and S2, now adopted or referenced by over 20 jurisdictions.
• European Central Bank (ECB) — Leads the most advanced supervisory program on climate risk for banks, including economy-wide stress tests and binding supervisory expectations.
• Bank of England — Pioneer of climate scenario analysis through CBES; the UK's Transition Plan Taskforce framework is becoming a global template.

Emerging Startups

• Risilience — Climate risk analytics platform used by FTSE 100 companies to quantify physical and transition risk at the asset level; raised $15 million in Series A funding in 2025.
• Clarity AI — Sustainability data and analytics platform covering 70,000+ companies; partners with regulators and exchanges for disclosure verification.
• OS-Climate — Open-source climate risk analytics developed under the Linux Foundation; building federated data infrastructure for transition planning.
• Cervest — Earth science AI platform quantifying asset-level climate risk for financial institutions and insurers across 200+ countries.

Key Investors/Funders

• Glasgow Financial Alliance for Net Zero (GFANZ) — Represents over $130 trillion in assets under management; provides sector-specific transition planning guidance for financial institutions.
• Climate Policy Initiative (CPI) — Tracks global climate finance flows exceeding $1.3 trillion annually; advises governments on regulatory design and blended finance.
• Bezos Earth Fund — Committed $10 billion to climate and nature, including grants supporting climate risk data infrastructure and disclosure standard development.

Action Checklist

• Map your regulatory exposure across jurisdictions. Build a compliance calendar that tracks effective dates and phase-in schedules for CSRD, ISSB adoption, SEC rules, California SB 253/261, and UK SDR/TPT requirements.
• Develop or refine your transition plan. Align with the UK TPT framework as a best-practice benchmark. Include quantified interim targets, capital allocation assumptions, and engagement strategies for high-emitting counterparties.
• Integrate climate risk into internal risk models. Work with risk teams to embed physical and transition risk factors into credit scoring, portfolio stress testing, and ICAAP/ILAAP submissions.
• Invest in Scope 3 and financed emissions data. Adopt PCAF methodologies and invest in data systems that can move from estimated to reported emissions over time. Engage portfolio companies and borrowers on primary data collection.
• Prepare for climate litigation exposure. Brief boards on evolving fiduciary duty standards and establish governance structures that document climate risk oversight. Consider director and officer liability insurance coverage for climate-related claims.
• Strengthen greenwashing controls. Implement internal review processes for all sustainability-related marketing, product labeling, and client communications. Align fund naming with ESMA guidelines and the EU Green Claims Directive.
• Engage with regulators and standard-setters. Respond to consultations from the FCA, ECB, SEC, and ISSB. Participate in industry groups such as GFANZ working groups to shape implementation guidance.

FAQ

What is the difference between climate stress testing and traditional financial stress testing? Traditional stress tests model the impact of macroeconomic shocks (recessions, interest rate spikes) on bank balance sheets using historical data. Climate stress tests introduce forward-looking scenarios that capture physical damage from extreme weather and chronic environmental shifts, as well as transition impacts from policy changes, carbon pricing, and technology disruption. The time horizons differ significantly: traditional tests typically span one to three years, while climate scenarios extend 10 to 30 years or more. Methodologies are evolving rapidly, and the NGFS (2025) short-term scenarios now bridge this gap by providing one to five year climate-adjusted macroeconomic projections.

Will climate risk lead to higher capital requirements for banks? The direction of travel points toward yes. While the BCBS has not yet mandated climate-specific capital add-ons, its 2024 principles make clear that climate risk must be captured within existing Pillar 1 frameworks. Supervisors like the ECB and MAS are already requiring banks to demonstrate that internal models account for climate-related credit deterioration. MAS has announced pilot capital buffer requirements for fossil fuel-concentrated portfolios by 2027. Over time, as data quality and modeling capabilities improve, expect climate-adjusted risk weights to become standard practice.

How should companies approach the patchwork of disclosure requirements? Start with the ISSB's IFRS S1 and S2 as the global baseline, since most jurisdictions are building on or referencing these standards. Layer on jurisdiction-specific requirements such as the CSRD's double materiality lens or California's Scope 3 mandates. Use the ISSB-EFRAG interoperability mapping to identify where a single data point can satisfy multiple regimes. Invest in modular reporting systems that allow outputs to be configured for different jurisdictional formats. The upfront investment in a structured data architecture will reduce compliance costs as additional mandates emerge.

What role does litigation play in climate financial regulation? Climate litigation is increasingly functioning as a parallel enforcement channel. With over 2,700 cases globally by end of 2025 (Grantham Research Institute, 2025), courts are establishing precedents on corporate duty of care, fiduciary obligations, and the adequacy of climate risk disclosures. Financial institutions face litigation from shareholders alleging inadequate transition planning, from NGOs challenging fossil fuel financing, and from regulators using court rulings to justify stricter supervisory expectations. Board-level awareness of litigation trends is now a governance imperative.

When will these regulations become binding for most financial institutions? The timeline varies by jurisdiction and institution size. The CSRD applies to large EU companies from fiscal year 2024, with listed SMEs phased in by 2026. ISSB-aligned disclosures are being adopted on rolling schedules, with the UK, Australia, Japan, and Singapore among the first movers for 2025 and 2026 reporting periods. The FCA's mandatory transition plan rules are proposed for 2027. Pillar 1 capital integration will take longer, likely 2028 to 2030 for initial implementation. The clear message from regulators is that waiting is no longer a viable strategy.