The OECD now puts global biodiversity finance at between $74.9bn and $92.4bn a year for the 2023–2025 period. The estimate comes from its report An Overview of Global Biodiversity Finance, published this week.

The headline number carries weight for textile and apparel sourcing teams because it sets the benchmark against which nature-related compliance obligations will be measured. Biodiversity finance is the funding pool that governments and industry draw on to meet targets under the Kunming-Montreal Global Biodiversity Framework, and apparel supply chains — cotton, viscose, leather, wool — sit squarely inside its scope.

Domestic budgets carry the load

Domestic public expenditure accounted for roughly two-thirds of the total, the OECD found, at an estimated $46bn to $63.5bn annually across the three-year window. That concentration matters for suppliers. It means biodiversity funding still flows largely through national treasuries and government programmes rather than private capital markets or buyer-led mechanisms.

For factories and raw material processors in major sourcing countries, the practical implication is direct. Where public money funds watershed restoration, land-use planning or species protection, it shapes the regulatory environment around mills, tanneries and fibre plantations. Sourcing teams tracking water risk in cotton-growing regions or deforestation exposure in viscose supply chains should read the OECD figures as a map of where state capacity to enforce nature rules is strongest.

What the numbers do not show

The OECD's range is wide — $74.9bn to $92.4bn — and the report does not break out private-sector contributions as a separate confirmed figure in the published summary. The gap between the low and high estimates, some $17.5bn, reflects the difficulty of tracking spending that countries classify differently. Any buyer sustainability claim that leans on aggregate biodiversity finance figures should be traced back to this OECD methodology, not to secondary summaries.

The report also predates full first-round reporting under the Global Biodiversity Framework, so the 2023–2025 baseline will firm up as national disclosures arrive.

The sourcing decision it forces

Apparel brands with nature-related commitments now have a defensible anchor figure. Two-thirds of the money is public, which means supplier-country policy — not brand philanthropy — is doing the heavy lifting. Procurement teams should therefore:

• Map fibre origins against the countries where domestic biodiversity spend is concentrated, because enforcement capacity will follow the money.
• Treat any supplier biodiversity claim as a compliance item and verify it against the OECD's accounting categories rather than marketing language.
• Watch for the next OECD revision, which will show whether private finance is scaling or whether the burden on public budgets in sourcing regions is growing.

The confirmed commercial fact is the number itself: $74.9bn to $92.4bn a year, two-thirds of it domestic public expenditure. Everything buyers do next on nature claims hangs off that arithmetic.