Implementing an effective post-2020 global biodiversity framework will demand ambitious and widespread use of biodiversity policy instruments, and other measures, to promote sustainable patterns of production and consumption. It will also require governments and the private sector to scale up biodiversity finance and reduce finance flows that harm biodiversity. While it is clear that biodiversity finance must be increased, little information has been available on recent biodiversity expenditure. Building on OECD’s 2019 report to the G7 Environment Ministers on “Biodiversity: Finance and the Business and Economic Case for Action”, which included a preliminary update on global biodiversity finance flows, this report aims to address this information gap by providing a more comprehensive overview and an aggregate estimate of global biodiversity finance. The report also provides an overview of government support potentially harmful to biodiversity, and offers recommendations for improving the assessment, tracking and reporting of biodiversity finance.