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Add to Preferred SourcesGlobal biodiversity finance reached an estimated USD 74.9-92.4 billion per year between 2023 and 2025, with contributions rising across both public and private sources, according to a new press release issued by the OECD on 1 October 2026. The findings come from a new report, An Overview of Global Biodiversity Finance, which assesses the scale and composition of funding directed at protecting nature. The analysis arrives as governments prepare for the next major round of biodiversity negotiations. It outlines where resources are coming from and how they have evolved over recent years. The report also proposes ways to strengthen the quality of biodiversity finance data.
Public domestic expenditure accounts for around two-thirds of total biodiversity finance, estimated at USD 46.0-63.5 billion per year in 2023-2025. Public international finance, which covers both bilateral and multilateral official development assistance, contributed USD 16.1 billion per year on average. Private domestic and international finance added USD 12.9 billion to the total. Within this category, private investment reached USD 9.8 billion, while philanthropy and other sources contributed USD 3.1 billion. Together, these flows reflect a diversified financing base for biodiversity-related activities.
Evidence indicates that both public and private finance are increasing. Public domestic expenditure rose by 16% between 2018-20 and 2023-24 across 63 countries, based on available consistent time-series data. International public finance increased by 94% over the same period. Private investment grew by 73% between 2018-20 and 2023-25. These trends point to a broad-based expansion of biodiversity-related funding.
The OECD notes that reversing biodiversity loss will require ambitious efforts to mobilise finance at scale. Improving the tracking and reporting of biodiversity finance will support these efforts by providing a clearer picture of financing trends. To this end, the report proposes options for improving the consistency, international comparability, coverage and transparency of biodiversity finance data. The analysis is designed to inform both policymakers and investors. It also complements the OECD’s broader work on nature-related finance.
The findings are released as countries prepare for the 17th meeting of the Conference of the Parties to the Convention on Biological Diversity (COP17), to be held in Yerevan, Armenia, from 19 to 30 October 2026.