Sustainable International Financial Institutions Act of 2025

S 3123, the Sustainable International Financial Institutions Act of 2025, requires U.S. representatives at major international financial institutions (like the World Bank, IMF, and regional development banks) to use their voting power to oppose new fossil fuel projects and advance clean energy funding. The bill mandates that the U.S. reduce its financial contributions to any institution funding new fossil fuel capacity (including expansion of existing projects), with the withheld funds held in an escrow account until the institution stops such funding. It directly affects countries and entities receiving loans or assistance from these institutions, as well as the institutions themselves, by blocking new fossil fuel investments and requiring them to phase out support for fossil fuels by 2027. Key provisions include a defined scope of "fossil fuel activity" (covering coal, oil, gas, and unconventional sources like oil sands) and annual reporting requirements to Congress.