Permanence, Reversals and Buffer Pools

Updated 2026-11-02 · 3 min read · By the akar.earth specialist team

Permanence in carbon credits explained: what reversals are, how Verra, Gold Standard, Plan Vivo and ART use buffers, and Indonesian fire and tenure risks.

Permanence means that carbon kept out of the atmosphere by a project stays out for the long term. Forest and land carbon can be lost again through fire, logging, drought, pests or land conversion, so standards protect issued credits with buffer pools, monitoring obligations and rules that make projects compensate for avoidable losses.

For nature-based credits, permanence is the risk buyers ask about most after additionality and baseline. It is especially relevant in Indonesia, where peat and forest fires can wipe out years of gains in one dry season.

Reversals: avoidable and unavoidable

Projects must report losses. A project with a net loss usually cannot receive new credits until the lost carbon has recovered.

How major standards handle permanence

• Verra VCS. The AFOLU non-permanence risk tool sets each project’s buffer contribution. Credits go into the Verra buffer pool, which Verra cancels to cover reversals. Projects with harvesting are capped at the long-term average carbon stock.
• Jurisdictional programmes. Verra’s JNR framework has its own non-permanence risk tool. ART TREES applies buffer deductions at issuance. Read ART registry.
• Gold Standard. Uses buffer arrangements for land-use projects and requires monitoring through the project period.
• Plan Vivo. Requires risk management and buffer arrangements in its standards. See PV Climate.
• ICVCM. Permanence is one of the Core Carbon Principles. CCP assessment considers how programmes handle reversal risk.

Check each standard’s current rules for buffer percentages, monitoring periods and compensation obligations.

How to manage permanence step by step

1. Identify risks. Fire, encroachment, tenure disputes, financial failure, extreme weather, pests.
2. Quantify exposure. Use historical data, such as fire hotspot records, to estimate likelihood and impact.
3. Design mitigation. Fire brigades, firebreaks, community patrols, legal agreements, diversified revenue.
4. Score the risk with the standard’s tool and document evidence.
5. Monitor continuously. Satellite alerts between verifications. Read deforestation alerts.
6. Report losses promptly and update risk assessments.
7. Plan for the long term. Secure land rights and funding beyond the crediting period.

Indonesia and Southeast Asia risks

• Fire. Drained peat in Sumatra and Kalimantan is highly flammable, especially in El Niño years. Peat fires release very large amounts of carbon. Rewetting and fire response capacity are the main mitigations. Read peatland REDD+.
• Tenure. Overlapping claims and encroachment can cause avoidable losses. Clear rights reduce risk. Permenhut 6/2026 names social forestry, customary forests and communities as legitimate participants, which can strengthen community stewardship.
• Policy change. Shifts in carbon trading rules, such as the move to Perpres 110/2025 and SRUK, create uncertainty for long-term commitments.
• Coastal change. Mangrove projects face erosion, storms and sea-level rise.
• Commodity prices. High oil palm or mineral prices raise the opportunity cost of keeping forest.

Durability and buyer choice

Buyers increasingly compare nature-based credits with more durable removals such as biochar or engineered removals. Forests carry higher reversal risk but deliver biodiversity and community benefits. Many buyers combine both. Read removals vs avoidance and VM0044 biochar.

Long-term commitments in practice

Permanence depends on what happens after the crediting period. Projects can strengthen long-term commitments through conservation agreements on the land, management plans built into licences or social forestry permits, endowment or trust funds for ongoing protection, and community institutions with the authority and resources to keep protecting the land. Buyers and raters look for these arrangements, not just a buffer percentage.

Insurance products for carbon reversal risk are emerging, but coverage and terms vary. Treat them as a complement to the buffer, not a replacement, and check what events and periods a policy actually covers.

What buyers should ask

Ask for the project’s buffer percentage and the evidence behind it, any loss event reports, its fire history, its tenure situation and how it plans to maintain carbon after the crediting period. Compare the answers with independent satellite data on fire and forest loss in and around the project.

Pitfalls verifiers flag

• Risk scores not backed by data.
• Fire mitigation claimed without equipment, staff or records.
• Losses not reported between verifications.
• Long-term commitments without legal backing.

Our dMRV implementation builds continuous fire and disturbance monitoring into projects. See the forest carbon hub and the standards hub.