Which monitoring method applies to my airline?
Small emitters and new entrants can use the simplified route with ICAO’s CERT tool. Large operators choose from ICAO’s five approved fuel monitoring methods.
Compare the five methodsTopic · 4 articles
CORSIA: monitoring, offsetting and sustainable aviation fuel
CORSIA is ICAO’s Carbon Offsetting and Reduction Scheme for International Aviation. These articles explain how airline operators monitor and report CO₂, which monitoring route applies to them, how offsetting works, and how sustainable aviation fuel counts.
Written by
Minxing Si, Ph.D., P.Eng.Lead verifier, ISO 14064-3
Read in this order
Small emitters and new entrantsDemystifying CORSIA: A Guide to Simplified CO₂ Monitoring for Small Airline Operators
A practical guide to CORSIA’s simplified monitoring pathway, explaining who can use the ICAO CERT tool and how emissions are calculated for small emitters, new entrants, and exempt flights.
· 4 min read
Large operatorsPrecision Reporting: Mastering CORSIA Fuel Monitoring Methods for Large Airline Operators
A practical guide to ICAO’s five approved CORSIA fuel monitoring methods, helping large airline operators transition from simplified modeling to precise emissions reporting.
· 3 min read
OffsettingUsing Offsets Under CORSIA: CORSIA Eligible Emissions Units (EEUs)
A technical overview of CORSIA offsetting, explaining how CORSIA Eligible Emissions Units (EEUs) are calculated, weighted, and cancelled across compliance cycles using ICAO’s offset equation.
· 3 min read
Sustainable aviation fuelCORSIA – Sustainable Aviation Fuel
Understand how SAF meets CORSIA requirements through lifecycle emissions calculations, ILUC determination, emission credits, and verified reporting frameworks.
· 6 min read
Common questions
How does sustainable aviation fuel reduce CORSIA obligations?
Operators can claim emissions reductions from CORSIA eligible fuels, calculated from the fuel’s life-cycle emissions, which lowers the number of EEUs they must cancel.
How SAF is calculated