akar.earthHow Forest Carbon Credits Work
How forest carbon credits work, step by step: from baseline and measurement to verification, issuance and retirement, with the Indonesian rules that now apply.
A forest carbon credit represents one tonne of CO2 equivalent that a forest project removed from the atmosphere or prevented from being emitted, compared with what would have happened without the project. The project measures carbon, an independent auditor verifies the result, a registry issues serialised credits, and buyers retire them to support a climate claim.
Forest credits come in two broad kinds. Removal credits come from growing trees, through afforestation, reforestation and revegetation (ARR) or agroforestry. Avoidance credits come from protecting forest that would otherwise be cleared or degraded, mainly REDD+. Both depend on a credible baseline, accurate measurement and safeguards for people who live on the land.
The core building blocks
| Building block | What it means |
|---|---|
| Standard | The program that sets the rules and runs the registry, such as Verra, Gold Standard, Plan Vivo or ART |
| Methodology | The rulebook for a project type, such as VM0047 for ARR or VM0048 for REDD+ |
| Baseline | What would happen without the project |
| Additionality | Proof the project would not happen without carbon finance |
| Measurement | Field plots, allometric equations and remote sensing to quantify carbon |
| Leakage | Emissions displaced elsewhere by the project, deducted from credits |
| Permanence | Managing the risk that stored carbon is later lost, usually with a buffer pool |
| Verification | Independent audit of each monitoring period’s results |
| Registry | Issues, tracks and retires credits by serial number |
How it works, step by step
- Feasibility. Check land eligibility, rights, carbon potential and costs.
- Design. Choose a standard and methodology, set the baseline, plan monitoring, and secure community consent.
- Validation. An accredited auditor checks the design against the rules.
- Registration. The standard lists the project on its registry.
- Implementation. Plant, protect or manage the forest as designed.
- Monitoring. Measure carbon at intervals using plots and satellite data.
- Verification. The auditor checks the monitoring report.
- Issuance. The registry issues credits, after deductions for uncertainty, leakage and the buffer.
- Sale and retirement. Buyers purchase credits and retire them against claims.
The carbon project lifecycle covers each stage in more detail.
How the tonnes are calculated
For tree growth, carbon is calculated from tree measurements. Diameter and height go into allometric equations to estimate biomass, which is converted to carbon and then to CO2. See from tree biomass to tonnes of CO2. For REDD+, the calculation compares forest loss in the project area with a baseline rate, multiplied by carbon stocks per hectare. Each standard specifies which carbon pools to count.
Quality signals buyers look for
- A CCP label from ICVCM, which needs a CCP-Approved methodology used under a CCP-Eligible program.
- Independent ratings. BeZero has rated 11 ex-post Indonesian projects at an average of A.
- Co-benefit labels for community and biodiversity outcomes.
- Transparent monitoring data and conservative baselines.
Indonesia specifics
Indonesia’s carbon framework was rebuilt in 2025 and 2026. Perpres 110/2025 is the legal anchor. Exchange-traded units must be recorded in SRUK. Permenhut 6/2026 sets procedures for forestry carbon trading and names social forestry, customary forests and communities as legitimate, equal participants. Projects may need to satisfy both domestic rules and an international standard.
Where the money goes
Credit revenue has to cover a long chain of costs: feasibility studies, community engagement, planting or forest protection, field measurement, auditor fees, registry fees, and benefit payments to communities, often over 20 to 40 years or more. Upfront costs arrive years before the first credits. That is why many projects rely on prepayment or offtake agreements, and why credit quality matters so much: BeZero reports prices rising about 40% between rating bands, while noting Indonesian credits still trade at a fraction of the real cost of abatement.
Who is involved
- Project developer: designs and runs the project, often with community partners.
- Landholders and communities: hold rights to the land and carry out much of the work.
- Standard body: sets rules and runs the registry.
- Validation and verification body: audits the design and results independently.
- Government: grants permits, sets domestic rules and, for Article 6, authorises international transfers.
- Buyers and intermediaries: purchase, trade and retire credits.
Common misunderstandings
- “Planting trees creates credits immediately.” Credits come from measured growth, verified after the fact.
- “Protecting any forest earns credits.” Only forest under credible threat, with a defensible baseline, qualifies.
- “Credits last forever.” Permanence risks are managed, not eliminated.
- “All credits are equal.” Quality varies widely by baseline, data and safeguards.
Not sure if your land qualifies? Try the project eligibility quiz or start at the forest carbon hub.
Frequently asked questions
What is a forest carbon credit?
A tradeable certificate representing one tonne of CO2 equivalent removed from the atmosphere or kept out of it by a forest project, measured against a baseline and verified by an independent auditor under a recognised standard.
Who pays for forest carbon credits?
Companies with climate commitments, airlines under CORSIA, governments under Article 6 deals and, in Indonesia, participants in domestic trading on IDXCarbon. Each buyer type has its own eligibility rules.
How long does it take to get forest carbon credits?
Usually several years. Feasibility, design, validation and registration come first, then monitoring and verification. Planting projects issue removal credits only after trees have grown enough to measure.
What happens when a credit is used?
It is retired on a registry, with a serial number, so it cannot be sold again. The buyer can then make a claim about the tonne it represents, within the limits of guidance such as the VCMI Claims Code.