The Financial Centres for Sustainability Network (FC4S) Assessment Programme (AP) is the first initiative of its kind to evaluate the state of sustainable finance in international financial centres, understood as key actors in steering the transition towards a sustainable future. The AP enables an assessment of the status of sustainable finance in these influential financial centres - delving into their institutional foundations, regulatory environment, and market infrastructures – and a monitoring of the trajectory of their endeavours in nurturing sustainable finance markets, and in contributing to the Sustainable Development Goals (SDGs).