CORSIA

Full explainer

CORSIA — the Carbon Offsetting and Reduction Scheme for International Aviation — is the global market-based mechanism agreed by the International Civil Aviation Organization (ICAO) to address international aviation emissions. It requires participating airlines to offset their CO₂ emissions above a baseline (2019 levels for the First Phase, 2024-2026; 85% of 2019 levels for the post-pilot CORSIA Phase). Offsetting must use 'CORSIA Eligible Emissions Units' — credits from registries (Verra, ART/TREES, Gold Standard, ACR, CAR, CDM successors) whose specific programmes have been approved by the ICAO Technical Advisory Body.

For Indonesian forestry credits, eligibility under CORSIA depends on the specific methodology and vintage: not every VCS credit qualifies, and many Indonesian Verra projects have been outside the CORSIA-eligible date window. Article 6 cooperation has the potential to channel Indonesian credits to CORSIA buyers via ITMO transfers with corresponding adjustments.

Authoritative source

Related terms

• ITMO
• Article 6
• VCS
• ICVCM