Will Climate Change Reshape European Banks’ Business Models?
Introduction
Recent years have seen a clear escalation in climate-related extremes. Floods, wildfires, droughts, and intense storms have become more frequent and severe, delivering devastating human and economic impacts. In 2025, global natural disaster damages reached approximately $220–224 billion, according to reinsurer estimates, with the United States alone recording $115 billion in losses from 23 billion-dollar events. These costs continue to rise over the long term, placing mounting pressure on economies and the financial system.
Central banks and supervisors increasingly recognise climate change as a source of financial stability risk. This awareness is shifting regulatory focus from voluntary disclosures toward practical integration of climate factors into capital, risk management and stress testing frameworks. For European banks, this evolution has the potential to influence lending practices, balance sheet resilience and long-term profitability.
Our analysis examines how leading European banks are navigating this transition, the risks of lagging behind and the opportunities arising from sustainable finance.
Climate Risk and Financial Stability
Central banks’ core mandates, price stability and financial stability are now being tested by climate-related pressures. Extreme weather can drive inflation through supply disruptions ( droughts affecting food and energy prices), while physical damage and transition costs can impair asset values and increase credit losses.
Recent supervisory exercises highlight the scale of potential impacts. The ECB’s 2025 stress test extensions, incorporating transition and acute physical risks, showed moderate but meaningful additional capital depletion (around 74 basis points from transition risks and 77 basis points from physical risks in combined scenarios). Losses were concentrated in energy-intensive sectors and specific geographic areas, underscoring the importance of granular risk assessment. Earlier Bank of England exercises similarly pointed to substantial potential losses under “no additional action” scenarios.
As a result, regulation is moving from disclosure to implementation. The European Banking Authority (EBA) continues to integrate environmental risks into supervisory expectations, with guidelines on ESG risk management applying from 2026 (and scenario analysis from 2027). Proposals to reflect climate factors in Pillar 1 capital requirements and systemic risk buffers are under active discussion, while Pillar 3 disclosures now mandate greater transparency on transition and physical risk exposures.
Key Climate Risks for Banks
Banks face two primary categories of climate risk:
Transition risks: Arising from policy changes, technological shifts and evolving customer behaviour toward a lower-carbon economy. These can affect high-emitting sectors through carbon pricing, stranded assets or reduced demand.
Physical risks: Stemming from acute events (floods, storms, wildfires) and chronic changes (rising sea levels, heatwaves). In mortgage portfolios, for example, properties in flood-prone or coastal areas face higher damage risk, potential value depreciation and insurance challenges.
The 2024 Valencia floods in Spain provided a stark reminder. The event caused significant economic damage (estimated at over €10 billion for businesses alone, with broader national GDP impact of around 0.2–0.65 percentage points in affected quarters) and highlighted vulnerabilities in real estate exposures.
Why Fixed Income and Bank Investors Should Focus on Transition Risk
Central banks are using regulation to encourage proactive risk management. The EBA’s ongoing work on incorporating environmental risks into capital frameworks, combined with mandatory Pillar 3 disclosures, is prompting banks to reduce exposures to high-carbon sectors. Data from early Pillar 3 reports show some institutions have meaningfully adjusted lending patterns, though data consistency and restatements remain challenges.
Investors should scrutinise banks’ sectoral exposures, transition plans and progress on financed emissions as key indicators of resilience and forward-looking risk management.
Sustainable Opportunities: CaixaBank as a Case Study
Among European banks, CaixaBank stands out for its proactive approach to sustainable finance. The bank has been one of the region’s most active issuers of green, social and sustainable bonds. By early 2026, it had mobilised substantial volumes through these instruments, with proceeds directed toward renewable energy, green buildings, clean transport, water management and other qualifying projects.
A significant portion of green bond proceeds supports renewable energy and energy-efficient properties. As one of Spain’s largest mortgage lenders, CaixaBank is also attuned to physical risks. Following the Valencia floods, the bank’s relatively lower exposure to the worst-affected areas helped limit immediate impact but the event reinforced the need for climate-resilient lending practices.
CaixaBank has introduced innovative products, such as energy-efficiency mortgages that incentivise retrofits (requiring measurable improvements in energy performance). In recent years, a meaningful share of its new mortgage originations has targeted high-efficiency properties (EPC A or B ratings). These initiatives align with the EU’s long-term goal of decarbonising the building stock by 2050 and can strengthen the bank’s credit quality by reducing future risk exposure.
From an investment perspective, CaixaBank’s bonds (including Additional Tier 1 and senior non-preferred instruments) have demonstrated spread tightening in recent periods, reflecting both fundamental credit strength and recognition of its sustainable positioning.
Conclusion
Regulation in European banking continues to evolve, with climate considerations now embedded in risk management, capital planning, and supervisory expectations. While the disclosure and implementation landscape differs across the Atlantic, potentially creating opportunities or risks of regulatory arbitrage, European banks face growing pressure to integrate transition and physical risks into their business models.
Leaders like CaixaBank illustrate how sustainable finance can support both societal goals and long-term financial resilience: by financing the green transition, managing physical exposures proactively and innovating products that help customers adapt. For investors, distinguishing between banks that treat climate risk as a strategic priority versus those lagging behind will be increasingly important for assessing credit quality and long-term performance.
As central banks and supervisors move from analysis to action, climate factors are no longer peripheral, they are becoming core drivers of European banks’ strategies and resilience.
Important notes:
This article is for informational purposes only and does not constitute investment advice. Regulatory developments, stress test outcomes, and climate-related events can evolve rapidly. The value of investments can fall as well as rise.