The Integrity Council for the Voluntary Carbon Market (ICVCM) is an independent governance body that publishes the Core Carbon Principles (CCPs) and related guidance intended to define high-level integrity criteria for carbon credits used in the voluntary carbon market. The CCPs are presented as a threshold benchmark for "high-integrity" credits and for claims made about the use of such credits. ICVCM publishes an assessment framework, definitions, and an assessment procedure, and it assesses carbon crediting programs against those requirements to determine whether a program is "CCP-Eligible". ICVCM's framework separates program and credit category decisions. Carbon crediting programs may be assessed as CCP-Eligible, and CCP-Eligible programs may apply a registry-based "CCP-Approved" label to credits from approved categories, using ICVCM implementation guidance for tagging and labelling. The tagging framework also includes optional attribute tags, including tags intended to signal host-country authorisation for international mitigation purposes under Article 6 of the Paris Agreement (see Cooperative mechanisms under Article 6 of the Paris Agreement). ICVCM was established in 2021 following recommendations of the Taskforce on Scaling Voluntary Carbon Markets (TSVCM). It published the CCP document set in January 2024 and later issued operational guidance for CCP tagging and labelling in registries. In 2024, ICVCM said that several renewable energy crediting methodologies would not be eligible for the CCP label, citing additionality concerns. ICVCM has been discussed in reporting on voluntary market reform and quality labelling initiatives, including debate about how benchmarks may affect crediting programs and corporate use of offsets. Reuters has also covered ICVCM benchmark tests and later decisions on approval of specific credit types under the CCP framework, including an August 2024 test in which around a third of credits did not meet the benchmark threshold, and later approvals of certain deforestation and clean cookstove credit types under the benchmark.
Background The voluntary carbon market involves carbon credits that are issued and traded outside mandatory (compliance) emissions trading schemes, and that are often used by organisations to support voluntary climate-related claims. Analyses of voluntary markets have argued that credit "quality" can be difficult for buyers and other stakeholders to judge because claimed mitigation impacts depend on counterfactual baselines (see FREL), monitoring methods, and how risks such as leakage, non-permanence, and double counting are addressed (see also REDD+). Market commentary and academic analysis have described recurring integrity concerns, including information asymmetries between project developers and credit buyers, heterogeneous methodologies across standards, and perverse incentives that can reward over-crediting when demand is driven by headline "tons" of carbon dioxide equivalent rather than robust impact. Policy and multilateral discussions in the early 2020s increasingly framed "integrity" as a prerequisite for scaling voluntary and related markets, including through guidance intended to improve transparency, consistency, and confidence in market participation and claims. In this context, governments and international institutions published frameworks that emphasised clearer rules and due diligence for market actors, and explored how voluntary activity could interact with wider carbon-market architecture and climate policy goals. Against that backdrop, a range of initiatives emerged that sought to establish common principles, quality labels, or benchmark tests for carbon credits and the programs that issue them. In voluntary markets, credits are typically issued and tracked under carbon crediting programs that set detailed rules and processes for quantification, validation and verification, and unit management, while separate benchmark or governance initiatives focus on evaluating those programs and signalling credit attributes against independent criteria. ICVCM describes its role as assessing carbon crediting programs against the CCPs and publishing supporting materials for program eligibility and assessment, rather than operating as a carbon crediting program or issuing credits itself.
History In January 2021, the Taskforce on Scaling Voluntary Carbon Markets (TSVCM), a private-sector initiative, published a blueprint for scaling voluntary carbon markets and said it planned to launch a governance body intended to set "core carbon standards". ICVCM has said it was set up in September 2021 in response to the final recommendations of TSVCM. In January 2024, ICVCM published the CCPs as a multi-part document set covering an introduction, the principles, a summary for decision makers, an assessment framework, definitions, and an assessment procedure. In May 2024, it published operational guidance for implementing CCP-related tagging and labelling in registries.
Core Carbon Principles The Core Carbon Principles (CCPs) are presented as a threshold benchmark for carbon credit quality in the voluntary carbon market. ICVCM presents ten principles:
CCP-1 Effective governance CCP-2 Tracking CCP-3 Transparency CCP-4 Robust independent third-party validation and verification CCP-5 Additionality CCP-6 Permanence CCP-7 Robust quantification of emission reductions and removals (see Greenhouse gas emissions accounting) CCP-8 No double counting CCP-9 Sustainable development benefits and safeguards CCP-10 Contribution toward net zero transition ICVCM groups the principles under themes covering governance, emissions impact, and sustainable development, and applies them through assessment criteria and procedures used to evaluate carbon crediting programs and categories of credits. The CCP materials are published as a multi-part set comprising an introduction, the principles, a summary for decision makers, an assessment framework, a definitions section, and an assessment procedure.
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