akar.earthPermanence: Definition
What is permanence in carbon credits? Why stored forest carbon can be lost, how buffer pools and monitoring manage reversal risk, and Indonesian risks.
Permanence is the requirement that carbon stored or emissions avoided by a project stay out of the atmosphere for a long, defined period. Forest carbon is not automatically permanent: fire, storms, pests, illegal logging or a change in land use can release it again.
Why it matters
A credit sold to offset a fossil emission should represent a lasting benefit. If the trees burn ten years later, the offset is undone. Permanence is therefore one of the core integrity tests in the ICVCM Core Carbon Principles, alongside additionality and robust quantification. Buyers and rating agencies weigh reversal risk when pricing nature-based credits.
How it is managed
- Risk assessment: projects score their natural, internal and external risks, for example with Verra’s AFOLU non-permanence risk tool.
- Buffer pool: a share of credits is withheld in a pooled reserve and cancelled if a reversal occurs.
- Long monitoring: projects keep monitoring and verifying for the crediting period and, under some programmes, beyond it.
- Legal and financial safeguards: land tenure, conservation easements, insurance and community benefit sharing reduce the incentive to reverse.
Indonesia angle
Indonesian projects face specific permanence risks. Peat fires during strong El Niño dry seasons can release large amounts of carbon quickly. Land tenure overlaps, changing spatial plans and concession disputes create external risk. Smallholder ARR depends on farmers keeping trees, so benefit sharing and harvest plans matter. Permenhut 6/2026 and Perpres 110/2025 now shape who holds carbon rights, which feeds into tenure risk scores.
Common mistakes
- Treating a buffer contribution as a full answer to permanence, without fire management or community agreements.
- Planting timber species with no plan for what happens at harvest.
- Underscoring political and tenure risk in the risk assessment.
Related terms
See reversal, buffer pool and non-permanence risk, or browse the carbon standards hub.
Frequently asked questions
How long must forest carbon be stored to be permanent?
There is no single answer. Standards set minimum monitoring and commitment periods, often several decades, and use buffer pools to cover losses during and after them. Check the current rules of each programme.
Are nature-based credits less permanent than engineered removals?
Forest carbon faces higher reversal risk from fire, pests and land-use change than geological storage. Standards manage this with buffers and monitoring rather than treating it as permanent by default.