The Integrity Council for the Voluntary Carbon Market (ICVCM) is a non-profit governance body established to define and enforce a global threshold of quality for carbon credits traded on the voluntary carbon market (VCM). It emerged from the Taskforce on Scaling Voluntary Carbon Markets (TSVCM), which was convened by Mark Carney in 2020, and was formally launched as an independent council in 2021.
ICVCM's central output is the Core Carbon Principles (CCPs) — a set of criteria that carbon-crediting programs and individual credit categories must meet to carry a "CCP-label." The CCPs were published in March 2023 and cover three pillars:
- Governance (effective program management, transparency, robust registries, third-party validation)
- Emissions impact (additionality, permanence, robust quantification, no double counting)
- Sustainable development (safeguards and contributions to UN Sustainable Development Goals)
ICVCM assesses crediting programs such as Verra (VCS), Gold Standard, the American Carbon Registry, the Climate Action Reserve, and ART TREES, then evaluates specific methodology categories within those programs. In 2024 it began issuing CCP-eligibility decisions — for example, approving certain ozone-depleting substances and landfill-gas methodologies while rejecting several widely used REDD+ avoided-deforestation methodologies for CCP status.
ICVCM is often discussed alongside the Voluntary Carbon Markets Integrity Initiative (VCMI), which addresses the demand side (how companies can credibly claim use of credits), whereas ICVCM addresses the supply side (credit quality). Together they form the de facto integrity architecture for the VCM, complementary to compliance regimes under Article 6 of the Paris Agreement.
For researchers, ICVCM matters because it is reshaping which legacy credits retain market value, influencing corporate net-zero strategies, and providing a benchmark that some jurisdictions (e.g., Singapore's eligibility list for its carbon tax offset mechanism) reference when defining eligible international credits.
Example
In June 2024, the ICVCM announced that three widely used REDD+ avoided-deforestation methodologies did not meet its Core Carbon Principles, prompting significant repricing of legacy forest-protection credits issued by Verra.
Frequently asked questions
No. ICVCM is an independent non-governmental governance body; its Core Carbon Principles are a voluntary quality benchmark, not legally binding regulation, though governments and buyers increasingly reference it.
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