The voluntary carbon market enables companies and institutions to purchase verified carbon credits — representing one tonne of CO₂ reduced or removed — to address emissions they cannot yet eliminate. With integrity frameworks maturing and removals gaining primacy, the VCM is rebuilding around higher standards and clearer quality signals.
Carbon credits are generated by projects that reduce or remove greenhouse gas emissions. A project developer designs an eligible activity, an independent auditor verifies the impact, a registry issues uniquely serialised credits, and a buyer retires them to claim the offset. Once retired, a credit cannot be resold.
The lifecycle has five stages: project design and methodology selection, independent validation and verification, credit issuance with unique serial numbers, trading on spot or offtake markets, and permanent retirement when the buyer claims the offset.
Four major registries underpin the market: Verra (VCS) — historically the largest by issuance, Gold Standard — focused on co-benefits in health and biodiversity, American Carbon Registry (ACR) — growing in industrial reduction, and Climate Action Reserve (CAR) — focused on North American forestry and methane.
Key participants include project developers, brokers and traders, corporate buyers (airlines, tech, consumer brands), independent rating agencies (Sylvera, BeZero, Calyx Global), and exchanges like Xpansiv CBL and ICE. OTC bilateral deals remain dominant, though exchange-traded contracts are growing.
The VCM is shifting structurally from avoidance credits — which prevent future emissions — toward removal credits that physically extract carbon from the atmosphere. Understanding this distinction is critical for any corporate offset strategy.
After the 2023 credibility crisis, the VCM launched a comprehensive institutional response. Three pillars now define what a high-quality carbon credit must demonstrate and how companies can use them credibly.
Ten science-based criteria covering governance, emissions impact, and sustainable development. By end of 2025, 8 programmes and 36 methodologies were assessed. CCP-labelled credits command a ~25% price premium — a concrete signal that integrity frameworks are pricing quality.
Guidance for how companies should use carbon credits in climate communications without greenwashing. The Scope 3 Action Code (May 2025) addresses indirect supply-chain emissions — which can represent up to 70% of a company's GHG footprint.
Sylvera, BeZero Carbon, and Calyx Global score projects on quality indicators and publish research that materially affects buyer decisions. The Calyx-Climate Decode Carbon Price-Integrity Index tracks pricing across quality tiers, with Tier 1 credits commanding a 65% premium over Tier 3.
Paris Agreement Article 6 connects voluntary markets with national climate accounting. Credits with corresponding adjustments and host-country Letters of Authorisation are eligible for compliance use (e.g., CORSIA). The highest-quality voluntary credits are converging with the compliance market.
The Science Based Targets initiative guides corporate net-zero commitments: reduce emissions by 90–95%, then neutralise residual 5–10% through durable carbon removals. SBTi-aligned companies allocated 47% of retirements to forestry in 2025 and disproportionately chose CCP-approved credits.
Satellite monitoring, AI-powered project verification, and blockchain-based registry infrastructure are reducing information asymmetries. Independent data platforms give buyers tools to assess credit quality without relying solely on standards bodies.
Canopy helps corporates navigate the voluntary carbon market with confidence — from calculating residual obligations to curating high-integrity credits, managing procurement, and generating compliance-ready reports.
Calculate residual emission obligations after direct decarbonisation. Quantify the volume, type, and quality of carbon credits needed to address your net-zero gap. Benchmark against SBTi pathways and peer companies.
Discover and shortlist high-integrity credits from all four major registries. Curated by project type, geography, vintage, CCP alignment, and independent quality ratings. Policy guardrails ensure your credits meet ICVCM and VCMI standards.
Send RFQs to vetted carbon credit suppliers. Compare quotes by project type, rating, vintage, and geography. Track responses, pricing, and delivery timelines. Manage validity windows and supplier negotiations.
Build optimal credit portfolios balancing cost, quality, and climate impact. AI-generated strategies: High Quality, Removals-First, Balanced, Cost Effective. Account for avoidance-to-removal transition timelines.
End-to-end procurement for carbon credits. Spot and multi-year contracting. Track credit delivery, retirement, and registry reconciliation. Full PO → Invoice → Payment → Delivery → Retirement pipeline.
Generate reports aligned with SBTi, VCMI Claims Code, and ICVCM frameworks. Track retirement inventory, quality metrics, and portfolio composition. Full audit trail for sustainability disclosures and stakeholder reporting.
The era of buying carbon credits without scrutiny is over. CCP-labelled credits command ~25% premiums. Tier 1 rated credits trade at 65% above Tier 3. SBTi-aligned companies are disproportionately choosing high-integrity, removal-focused credits. Climate Decode's Canopy platform ensures your offset strategy reflects the market's direction — not its past.
Deep-dive analysis on voluntary carbon markets, carbon credit integrity, corporate offset strategy, and market outlook from our VCM team.
Answers to the most common questions about the VCM, carbon credits, integrity frameworks, and corporate offset strategy.
The Voluntary Carbon Market allows companies, governments, and individuals to purchase carbon credits — verified units representing one tonne of CO₂ reduced or removed — to compensate for emissions they cannot yet eliminate. Unlike compliance markets (EU ETS, India CCTS), participation is voluntary and driven by corporate climate commitments, net-zero pledges, and sustainability strategies.
A carbon credit represents one metric tonne of CO₂ (or its equivalent in other greenhouse gases) either prevented from entering the atmosphere or actively removed from it. Credits are generated by verified projects, issued as unique serial numbers on a registry, and permanently cancelled when a buyer retires them. Once retired, a credit cannot be resold.
Four major registries underpin the VCM: Verra (Verified Carbon Standard) — historically the largest by issuance volume; Gold Standard — known for projects with strong co-benefits in health, biodiversity, and community development; American Carbon Registry (ACR) — growing rapidly in industrial emissions reduction; and Climate Action Reserve (CAR) — focused on North American forestry and methane projects.
In 2022–2023, investigative reporting found that some widely purchased REDD+ credits had overclaimed their emission reductions. The core criticisms centred on four areas: additionality (would reductions have happened anyway?), permanence (can stored carbon be guaranteed long-term?), leakage (does protection push deforestation elsewhere?), and over-crediting from faulty baseline assumptions. The market has responded with comprehensive integrity reforms through the ICVCM and VCMI.
Avoidance credits represent emissions prevented from entering the atmosphere — such as protecting a forest from deforestation. Removal credits represent carbon actively extracted from the atmosphere — through reforestation, biochar, direct air capture, or enhanced rock weathering. The market is increasingly shifting toward removals, which are considered higher integrity for net-zero claims under SBTi frameworks.
The Integrity Council for the Voluntary Carbon Market (ICVCM) published its Core Carbon Principles (CCPs) — ten science-based criteria covering governance, emissions impact, and sustainable development. Programmes and methodologies that meet these criteria carry a CCP-Approved label. By end of 2025, CCP-labelled credits commanded approximately 25% price premium over non-CCP credits, with 8 programmes and 36 methodologies approved.
Climate Decode's Canopy platform helps corporates calculate residual emission obligations, curate high-integrity carbon credits across all four major registries, build optimal offset portfolios balancing cost and quality, manage end-to-end procurement, and generate compliance-ready reports aligned with SBTi, VCMI, and ICVCM frameworks. The platform helps sustainability teams build offset strategies that reflect the market's direction toward quality, removals, and integrity.
Schedule a VCM Strategy Assessment with Canopy. Calculate your residual emission obligations, curate high-integrity carbon credits, build optimal offset portfolios, and generate reports aligned with ICVCM, VCMI, and SBTi frameworks.