A number of countries have created official definitions of sustainable finance as well as more comprehensive classification systems, referred to as sustainable finance taxonomies. This report maps sustainable finance definitions and taxonomies in five jurisdictions: the European Union, People’s Republic of China, Japan, France and the Netherlands. Taxonomies answer a need for greater certainty on the environmental sustainability of different types of investments. When appropriately designed, they can improve market clarity, bring confidence and assurance to investors, and facilitate the measurement and tracking of sustainable finance flows. The report lays out preliminary considerations for good design of taxonomies, which can support policy makers to develop and grow sustainable finance markets to help achieve environmental and sustainable development goals. It also identifies differences among the taxonomies in scope as well as commonalities. These commonalities could provide a basis for creating comparable frameworks that facilitate international investment while also reflecting differing national circumstances.