Skip Ribbon Commands
Skip to main content
Access the footer


(Click here for pdf version)

 January 2021

The Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA) is the first global market-based scheme that applies to a sector. It complements other aviation in-sector emissions reductions efforts such as technological innovations, operational improvements and sustainable aviation fuels to meet the ICAO aspirational goal of carbon neutral growth.

Under CORSIA, aeroplane operators with international flights are subject to monitoring, reporting and verification (MRV) requirements. As of 1 January 2019, operators are required to monitor their annual CO2 emissions, have them verified through a third-party verification process, and submit them to the States to which they are attributed. States collect emissions data from all their operators and submit consolidated information to ICAO. In addition to annual CO2 MRV, 88 States have volunteered to participate in offsetting CO2 emissions under CORSIA from its pilot phase that started on 1 January 2021.

CORSIA in Numbers (As of 31 January 2021)




Navigating CORSIA - A guide to the scheme’s design & implementation

Since the adoption of the CORSIA-related Standards and Recommended Practices (SARPs) in 2018, ICAO has developed the remaining elements needed for the CORSIA implementation.

Click here to watch on the ICAO TV the Navigating CORSIA series of pre-recorded presentations that focus on the status of implementation of CORSIA and provide information on its key design elements.

Click here for an infographic on the status of all implementation elements.


CORSIA CO2 Estimation and Reporting Tool (CERT)

Aeroplane operators can use the ICAO CORSIA CERT to support the monitoring and reporting of their CO2 emissions by populating the standardized Emissions Monitoring Plan template and the Emissions Report template. States can also use the ICAO CORSIA CERT to fill in reporting data gaps if an operator does not submit its Emissions Report.


The ICAO Council approved the 2020 version of the ICAO CORSIA CERT, which is now available here together with information on its underlying methodology.


CORSIA Capacity Building

ACT-CORSIA is the Assistance, Capacity Building and Training programme on CORSIA. It was established in June 2018 and encompasses the CORSIA Buddy Partnerships and all other ICAO outreach initiatives including sample model regulations for CORSIA, frequently asked questions (FAQs), brochure and leafletsvideos as well as CORSIA seminars/webinars and online tutorials.


CORSIA Frequently Asked Questions (FAQs): An updated version of the frequently asked questions (FAQs) on CORSIA, reflecting developments in 2020, is now available here.


ACT-CORSIA Buddy Partnerships are the core of capacity building activities. They rely on individual training of CORSIA Focal Points and involves experts from 131 States. In January 2021, Antigua and Barbuda, Barbados, Guyana, Jamaica, Suriname, Trinidad and Tobago received training bringing the total number of supported States under Phase III to 64. More information can be found here.


CORSIA Eligible Fuels

The ICAO Council approved two Sustainability Certification Schemes (namely the International Sustainability and Carbon Certification, and the Roundtable on Sustainable Biomaterials) as eligible to certify the sustainability and life cycle emissions values of CORSIA eligible fuels. Details on the evaluation of these two schemes can be found here.  


Additional Sustainability Certification Schemes are invited to apply for approval by following the process described here.


More information on CORSIA Eligible Fuels, including the latest version of all five ICAO CORSIA documents, is available here.



CORSIA Aeroplane Operators and Verification Bodies

The latest lists of aeroplane operator attributions to States and of verification bodies accredited in States have been approved by the ICAO Council and are available here.

The CORSIA Verification Course provides training on how to verify CO2 Emissions Reports that have been prepared by aeroplane operators, in accordance with the provisions of the CORSIA Standards and Recommended Practices (SARPs).


Click on the links below for more information on the following available formats:

> Face-to-face classroom

> Virtual classroom


International Civil Aviation Organization
999 Robert-Bourassa Boulevard, H3C 5H7, Montréal, Quebec, Canada

For more information, visit the ICAO website:

Share this page: