United Overseas Bank reported that its sustainable financing portfolio grew 21% year-on-year to SGD 70.1 billion in 2025, up from SGD 58 billion at the end of 2024, according to the bank's annual sustainability report published in March 2026. The figures reflect UOB's accelerating deployment of capital into green, social, and transition-linked lending across its core Asian markets as demand for labelled finance continues to grow from both corporate and institutional borrowers.
The 21% expansion is one of the more significant annual growth rates the Singapore-headquartered bank has disclosed under this metric, and it comes as regional demand for transition finance deepens in line with the growing adoption of the Singapore-Asia Taxonomy — a classification framework designed to define which economic activities qualify as green or are in the process of transitioning towards sustainability across the Asian context.
TAXONOMY ADOPTION SHAPING FINANCING STANDARDS
The Singapore-Asia Taxonomy, developed by the Monetary Authority of Singapore in collaboration with regional partners, has begun to influence how banks structure and categorise their sustainable finance transactions. For UOB, growing alignment with the taxonomy means that an expanding share of its loan book is being documented and assessed against defined environmental performance criteria, adding a higher degree of rigour and comparability to the sustainable portfolio figures it reports to shareholders and regulators.
Transition finance — providing capital to companies moving from carbon-intensive operations towards lower-emission business models — is a particular area of focus for UOB given the composition of Southeast Asian economies. Heavy industry, manufacturing, and fossil fuel-dependent energy sectors remain significant economic contributors across the region, and providing capital to support their decarbonisation requires a different lending framework from purely green finance, one that the taxonomy's transition category is specifically designed to accommodate.
The growth in UOB's sustainable portfolio has been supported by demand from corporate clients seeking green loans and sustainability-linked loan facilities, as well as by the bank's own product development efforts. UOB's presence across Singapore, Malaysia, Thailand, Indonesia, and Vietnam gives it access to a geographically diverse pipeline of sustainable financing opportunities in markets at different stages of the green transition.
SINGAPORE BANKS COMPETING ON ESG CREDENTIALS
Singapore's three major domestic banks — UOB, DBS, and OCBC — have each made substantial commitments to sustainable finance over recent years, competing actively for client mandates and investor recognition in a market where ESG performance is increasingly factored into equity valuations and the pricing of bank-issued debt. UOB's SGD 70.1 billion figure positions it in the upper tier of regional sustainable finance providers by disclosed portfolio size.
The sustainability report accompanying the portfolio data covers UOB's own operational footprint, governance approach, and climate risk management framework alongside the lending figures. The March 2026 publication aligns with the growing expectation from regulators, institutional investors, and index providers that banks disclose climate-related financial information in line with international reporting standards and task force recommendations.
UOB has not specified a near-term numerical target for further expansion of the sustainable financing portfolio beyond the broad commitment to supporting the net-zero transition across its operating markets. The bank has, however, articulated a long-term ambition to grow the sustainable share of its overall loan book progressively as product innovation and client readiness develop in each market it serves.