Sustainable aviation fuels (SAF)

Sustainable aviation fuels (SAF) includes biofuels (advanced and others), synthetic aviation fuels (RFNBO: renewable fuels of non-biological origin), synthetic low carbon fuels and recycled carbon aviation fuels (RCF). Mixed aviation fuels contain SAF blended with conventional aviation fuel. The biomass, RFNBO, RCF or synthetic low-carbon content of a mixed aviation fuel may qualify for a zero-emission factor under the EU ETS. In the Monitoring and Reporting Regulation (MRR) SAF are referred to as ‘alternative aviation fuels’. 

Additionally, under the Fit For 55 changes to the EU ETS directive, a new provision has been introduced allowing the application of free allowances for the use of SAF between 2024 and 2030. This measure is designed to incentivise the use of SAF and help offset the cost difference between kerosene and SAF. These fuels that are eligible for allocation are referred to as ‘eligible aviation fuels’ in the MRR.

Aircraft operators may claim a zero-emission factor for the biomass, RFNBO, RCF or synthetic low-carbon fraction in the mixed aviation fuel and apply for free allocation for eligible fuels, provided that the required evidence is demonstrated. This approach reduces the reported emissions and, consequently, lowers the surrender obligation.