States and Supporting Partners Join IATA's Alliance to Expand CORSIA Carbon Credit Supply

24 June 2026 (Geneva) –The International Air Transport Association (IATA) announced that the number of entities participating in the Supporting Alliance for CORSIA Eligible Emissions Unit (EEU) Supply has reached 50, with two important developments:

• The Governments of Guyana, Madagascar, the United Kingdom, Zambia, and Zimbabwe, have signed the Aviation Carbon Market Compact and joined the Supporting Alliance. Several other national governments have expressed their interest in joining the initiative, including Peru.
• The International Emissions Trading Association (IETA) and the Verified Carbon Market Collaborative, data partner Sylvera, and Airbus have also joined and are providing technical and financial support to the Alliance's activities.

The Alliance aims to raise awareness of the need for market action, and to help scale the supply of high‑quality emissions units for the Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA) to meet expected demand of 225-250 million CORSIA EEUs by spring 2027 by:

• Pooling resources and expertise in a targeted way, with practical support and implementation assistance to boost the supply of EEUs as rapidly as possible.
• Facilitating and enabling countries' management of the interface between their Nationally Determined Contributions under the UNFCCC and the process required to make carbon credits available for use under CORSIA.
• Improving countries' access to carbon markets and related resources, including carbon finance.
• The Supporting Alliance will remain engaged, share information on progress, and continually seek opportunities to drive participation in this broad-based collaborative effort.

"The engagement of the governments of Guyana, Madagascar, the United Kingdom, Zambia, and Zimbabwe, as well as the support provided by our partners from across the entire carbon market value chain, shows strong and shared commitment to strengthening the link between market demand and the policy frameworks. These frameworks remain critical to unlocking the full potential of CORSIA EEUs. The CORSIA Supporting Alliance demonstrates tremendous determination across the full spectrum of market participants to work together. We need to ensure that EEUs can be brought to market with the speed and scale required," said Marie Owens Thomsen, IATA's Senior Vice President Sustainability and Chief Economist.

"With CORSIA now coming into force, the global community has an unprecedented opportunity to channel capital toward impactful climate action. This new framework for increasing the supply of high-integrity compliance carbon credits for international aviation reflects years of progress in improving carbon market integrity, transparency, and governance, while helping establish the trusted infrastructure the aviation sector needs to make essential climate progress. The Supporting Alliance's plan to provide targeted, coordinated assistance for host countries to authorize credits and open access to carbon markets is timely and essential and High Tide is delighted to support efforts to make sure we don't miss this moment," said Alexia Kelly, Director, The Carbon Policy and Markets Initiative at High Tide Foundation, representing the Verified Carbon Market Collaborative.

"IETA is supporting the CORSIA Supporting Alliance and the Aviation Market Compact to bring together airlines, governments, and carbon market leaders around a shared objective: delivering a CORSIA market to support global aviation decarbonization. The success of CORSIA will depend on collaboration across the entire value chain and IETA is proud to support this effort and to work with host countries and partners to unlock the full potential of Article 6 and CORSIA," said Dirk Forrister, President and CEO, IETA.