Ecological baselines and shared governance structure variation among voluntary biodiversity credit schemes

Biodiversity credit markets are promoted as a scalable mechanism for closing the conservation finance gap, yet credibility remains a central challenge. Here, we assess 12 voluntary biodiversity credit schemes, selected from an initial pool of 20, against 15 design criteria spanning governance, rights and equity, credit integrity, and biodiversity monitoring. After correction for multiple testing, only two design features consistently distinguish schemes: baseline and sampling design, and co-governance. Differences among schemes are associated less with the technical instruments they employ than with upstream choices about how biodiversity change is evidenced and who holds authority over that evidence. These findings highlight public governance, robust ecological baselines, and clearly bounded claims as key conditions for establishing credible biodiversity credits. Biodiversity credit schemes differ most in how they measure biodiversity change and share decision making authority, according to a comparative analysis of 20 schemes assessed across governance, integrity and monitoring criteria.