Executive summary 

European banks are central to financing Europe’s transition and resilience agenda. Despite the region’s fragmented banking system, Europe’s banking sector has widely established a market-based green-labelled funding channel, with financial institutions accounting for around 30% of green bond issuance in Europe. This channel provides an opportunity to raise funds for green and transition-related assets.

IEEFA reviewed the green bond strategies of Europe’s 47 largest banks. The banks have combined assets exceeding €35 trillion, and many have diversified retail, corporate and markets businesses. The findings show that most banks have established green bond frameworks, issued green bonds and published allocation reports. Green bond issuance requires banks to identify, classify and disclose eligible green assets in greater detail than is typically provided in general sustainable finance reporting, improving transparency. Several banks have taken a step further by adopting the European Green Bond Standard, pointing to stronger credibility and comparability in the market.

However, the potential of bank green bonds remains highly underused. Green funding is still small relative to banks’ overall market-based funding and balance sheets. Although many banks present green bond programmes as part of their broader sustainable finance strategies, issuance has not yet scaled to a level that materially changes asset allocation. As a result, the contribution of green bonds to reducing banks’ climate risk exposure remains limited.

Bank green bond programmes are also not consistently aligned with Europe’s transition and resilience objectives. Eligible asset pools may be shaped by what is more readily available to earmark rather than by the areas where transition investment is most urgently needed. Some large diversified universal banks have low investments related to clean energy systems. Such investments account for only around a quarter of overall allocated green bond proceeds. Grid investment, for example, remains underrepresented, despite the recognised need for extensive grid modernisation and expansion together with banks’ strong existing relationships with major European transmission operators for providing liquidity backstop.

Environmental returns vary substantially across use-of-proceeds categories, and therefore across issuers. Renewable energy generally delivers substantially higher avoided emissions per euro invested than green buildings, particularly where buildings’ allocations refinance assets that already meet energy performance thresholds rather than fund renovations or retrofits. As a result, environmental impact is concentrated among more advanced issuers with more significant clean energy portfolios.

Other sustainable funding instruments do not yet close this gap. Alternative labels, such as transition finance, are less standardised and at times less credible to investors. Innovation is emerging through instruments such as sustainability-linked loan financing bonds, but issuance remains niche. Sustainability-linked structures also remain limited for banks, despite the structures’ potential to strengthen accountability, particularly when combined with use-of-proceeds features that connect bond-level allocation with issuer-level transition progress.

The market has further room to grow. Banks should integrate green funding more explicitly with sustainable finance targets, overall transition planning and risk management. This would strengthen the role of green funding in directing capital allocation towards Europe’s transition and resilience agenda.