Core Carbon Principles: Program Requirements and CCP Label

The Core Carbon Principles are ten science-based standards, set by the Integrity Council for the Voluntary Carbon Market (ICVCM), that define what makes a carbon credit high-quality. A carbon-crediting program must satisfy the governance-related principles to become CCP-Eligible, and each credit methodology must clear a separate technical review before credits issued under it can carry the CCP-Approved label. As of March 2026, nine programs hold CCP-Eligible status and roughly 105 million credits have been approved to carry the label.¹

The ten principles fall into three groups. Four cover how a program is run: effective governance, tracking through a registry, transparency, and robust independent third-party validation and verification. Four cover the environmental integrity of the credits themselves: additionality, permanence, robust quantification, and no double counting. The last two address broader impact: sustainable development benefits and safeguards, and contribution toward the net-zero transition.²

What Programs Must Show

Legal Structure and Registry

A carbon-crediting program has to operate under a structured legal framework with a governing body that is accountable for the integrity of every credit it issues. That means a defined mission, administrative protocols that prevent conflicts of interest, and objective decision-making across the issuance cycle.²

A digital registry sits at the center of the program. Each credit receives a unique identifier and is tracked from issuance through retirement, so buyers can verify ownership before they transact and the same reduction cannot be issued twice. The ICVCM also expects registries to move toward interoperability with other platforms so data can flow between systems.

Transparency and Independent Verification

Project methodologies, environmental impact reports, and the calculations behind claimed reductions must be publicly available, along with any risks flagged during the project lifecycle. That open-access rule lets buyers, researchers, and watchdogs check the numbers behind the claims.

Before credits are released, an independent auditor accredited by a recognized international body must verify the developer’s claims through field visits and technical assessments. The auditor confirms that the project follows the program’s rules and that reported reductions match what is actually happening on the ground.

What Each Credit Must Show

Additionality

A project qualifies only if its emission reductions would not have happened without revenue from credit sales. The framework accepts three ways to prove that:

Investment analysis, using metrics like net present value or internal rate of return to show the project would not meet standard financial benchmarks without carbon revenue. Assumptions must be documented and consistent with what the developer showed its own management and investors.
Barrier analysis, identifying specific financial, technological, or institutional obstacles that block the project through conventional means, paired with a market penetration assessment.
A standardized approach, where a program applies pre-approved criteria to screen certain project types automatically.

Whichever method is used, it must be combined with a common-practice assessment confirming the activity is not already widespread in the region or sector. Credits cannot be issued for activities that are legally required or already economically viable on their own.²

Permanence and Buffer Pools

Captured or avoided carbon has to stay out of the atmosphere for a meaningful period. For projects with reversal risk, such as forestry or soil carbon, the ICVCM requires a minimum monitoring and compensation period of 40 years, during which the program remains responsible for replacing any carbon that escapes.³

To manage the risk of reversals from wildfires, equipment failures, or similar events, programs must maintain buffer pools. Where the reversal risk is material, at least 20 percent of total issued credits must be set aside in a pooled buffer reserve. Programs can instead require contributions calibrated to each project’s specific reversal risk across the full monitoring period. If a reversal occurs, the program cancels an equivalent number of credits from the buffer.⁴

Quantification and No Double Counting

Quantification methodologies must be conservative and grounded in established scientific baselines, with frequent monitoring to confirm that reported outcomes reflect reality. Calculations must account for leakage, the unintended increase in emissions outside the project boundary caused by the project’s activities. A reforestation project that pushes agricultural activity into a neighboring area has to subtract those displaced emissions from its credit total.

Double counting is blocked through coordination with national registries so credits sold voluntarily are not also counted toward a country’s nationally determined contributions under the Paris Agreement. Project owners provide legal attestations confirming exclusivity, and programs apply accounting protocols to enforce it.²

Sustainable Development and Safeguards

Projects must deliver social and environmental benefits beyond carbon reduction, measured against recognized international standards so buyers can see the broader impact. Developers must also run stakeholder consultations and maintain grievance mechanisms that give affected people a real channel to raise concerns. A project that sequesters carbon while degrading local water sources or displacing wildlife habitat would fail this criterion.²

Where projects affect Indigenous Peoples and local communities, the framework requires Free, Prior, and Informed Consent. Consultations have to be inclusive and culturally appropriate. The framework prohibits forced eviction and any physical or economic displacement of Indigenous Peoples, including restrictions on access to lands or resources, unless genuinely agreed through an FPIC process.⁵

The final principle rules out projects that lock in emissions levels, technologies, or practices incompatible with reaching net-zero by mid-century. Credits should come from activities that facilitate low-carbon technology adoption or restore natural carbon sinks.¹

How the CCP Label Is Earned

The ICVCM runs what it calls a “two tick” assessment. The first review looks at the carbon-crediting program itself, including governance, registry, transparency, and auditing. A program that passes becomes CCP-Eligible.⁶

The second review looks at specific credit categories within eligible programs. A category might cover a particular methodology, such as methane capture from landfills or improved forest management. Only categories that clear this technical review earn the CCP-Approved label, and an eligible program can apply the label only to credits from approved categories. The two reviews run in parallel so labeled credits can reach the market faster.

Based on the ICVCM’s experience, an assessment takes roughly six to eight months after the initial completeness check is finished; that check itself can take additional time depending on how thorough the program’s submission is. The Council does not currently charge a fee for program or category assessments, funding its work through philanthropy and grants.⁷⁸

Nine programs currently hold CCP-Eligible status: ACR, Architecture for REDD+ Transactions (ART TREES), Climate Action Reserve, Equitable Earth, Gold Standard, Isometric, Puro.earth, Rainbow, and Verified Carbon Standard. Additional applications are under review. Approved methodologies include reforestation, improved forest management, and rice cultivation methane reduction. Roughly 105 million credits have been approved to carry the CCP label; of those, about 52 million appear available in the market and 53 million have been retired or cancelled.⁹¹⁰

Why the Label Matters for U.S. Buyers

Public companies in the U.S. that use carbon offsets as a material component of disclosed climate targets have to disclose the capitalized costs, expenditures expensed, and losses related to those offsets and any renewable energy certificates under SEC rules adopted in 2024. The information sits in a note to the financial statements, so auditors will look at it. Buying credits backed by an independently verified quality benchmark puts a company in a stronger position than disclosing spend on credits with no recognized standard behind them.¹¹

Companies marketing offsets to U.S. consumers also have to comply with the FTC’s Green Guides. Under 16 CFR 260.5, sellers must use competent and reliable scientific and accounting methods to quantify claimed reductions, must not sell the same reduction more than once, must clearly disclose if an offset represents reductions that will not occur for two years or longer, and cannot claim an offset represents a reduction that was legally required. The CCP requirements for additionality, quantification, and no double counting line up directly with those concerns, giving marketers stronger substantiation.¹²

Financial accounting rules for these credits are still in development. The Financial Accounting Standards Board completed redeliberations in August 2025 on proposed Topic 818, covering environmental credit programs, and has directed staff to draft a final Accounting Standards Update. Until that guidance is issued, there are no specific FASB rules for recording carbon credits as assets or expenses, and companies are working from a patchwork of existing standards and internal policies.¹³

1
The Integrity Council for the Voluntary Carbon Market. Core Carbon Principles
2
The Integrity Council for the Voluntary Carbon Market. Core Carbon Principles, Assessment Framework and Assessment Procedure
3
The Integrity Council for the Voluntary Carbon Market. Summary of Program Changes – ICVCM Assessment Framework
4
The Integrity Council for the Voluntary Carbon Market. Continuous Improvement Work Program Report – Permanence
5
The Integrity Council for the Voluntary Carbon Market. Assessment Framework – Core Carbon Principles
6
Integrity Council for the Voluntary Carbon Market. How We Assess Carbon-Crediting Programs
7
The Integrity Council for the Voluntary Carbon Market. FAQs for Applicant Carbon-Crediting Programs (Governance)
8
The Integrity Council for the Voluntary Carbon Market. FAQs for Carbon Market Practitioners
9
The Integrity Council for the Voluntary Carbon Market. Assessment Status
10
The Integrity Council for the Voluntary Carbon Market. Reforestation, IFM and Rice Methane Methodologies CCP-Approved
11
U.S. Securities and Exchange Commission. The Enhancement and Standardization of Climate-Related Disclosures – Final Rules
12
eCFR. 16 CFR 260.5 – Carbon Offsets
13
Financial Accounting Standards Board. Accounting for Environmental Credit Programs