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EU FuelEU Aviation (ReFuelEU Aviation)

EU FuelEU Aviation (ReFuelEU Aviation): EU ReFuelEU Aviation Regulation Mandates Sustainable Fuel Use Across the Airline Industry

Maílis Carrilho
Maílis Carrilho
Updated on October 23rd, 2025
3 min read

Summary

The ReFuelEU Aviation Regulation (Regulation (EU) 2023/2405) establishes binding requirements for aviation fuel suppliers, aircraft operators, and EU airports to progressively increase the share of Sustainable Aviation Fuels (SAF) in aviation fuel supplied across the European Union. Entering into force in 2023 and applicable from January 2025, it is a cornerstone of the EU’s Fit for 55 package, supporting the decarbonisation of the aviation sector and alignment with the 2050 net-zero target. The regulation mandates a SAF share of 2% in 2025, rising to 70% by 2050, and introduces reporting obligations to ensure transparency and compliance. While mandatory for all major EU airports and fuel suppliers, it includes limited exemptions for small operators and outermost regions. ReFuelEU Aviation aims to stimulate the SAF market, reduce lifecycle emissions, and drive innovation in cleaner aviation technologies across Europe.
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Details

Jurisdictions
  • European Union
Exempted entities

The ReFuelEU Aviation Regulation is mandatory for all aviation fuel suppliers, aircraft operators, and airports designated as “Union airports” within the European Union. It sets legally binding targets for the gradual incorporation of SAF into aviation fuel supply.

The regulation requires all affected entities to:

Supply or use aviation fuel with a minimum proportion of SAF, beginning at 2% in 2025 and rising to 70% by 2050.

Report annually on fuel volumes, SAF blends, and emissions performance.

Ensure that aircraft operators refuel sufficiently at EU airports to avoid carbon leakage from fuel tankering practices.

Exceptions and Flexibility

While mandatory, the regulation provides defined flexibilities:

Aircraft operators conducting fewer than 500 passenger flights or 52 all-cargo flights per year from EU airports may fall outside the mandatory scope.

Certain outermost region airports are excluded from SAF blending obligations due to logistical constraints.

Between 2025 and 2034, Member States may apply aggregated compliance mechanisms, allowing flexibility across multiple airports within the same national system.

Deep dive

What’s Required

The ReFuelEU Aviation Regulation (Regulation (EU) 2023/2405) establishes mandatory requirements for aviation fuel suppliers, aircraft operators, and EU airports to increase the share of Sustainable Aviation Fuels (SAF) in aviation fuel supplied within the European Union. The regulation also aims to prevent fuel tankering and ensure that aircraft operators refuel a high proportion of their fuel needs at EU airports, thereby supporting carbon reduction targets across the aviation sector.

Sustainable Aviation Fuels are defined to include advanced biofuels, synthetic fuels, and recycled carbon fuels that meet strict sustainability and greenhouse gas criteria. Fuel suppliers must meet minimum blending mandates, while airlines are required to report fuel usage and ensure compliance with EU fuel obligations.

Important Deadlines

  • 1 January 2025: Start of obligations; at least 2% of aviation fuel supplied at EU airports must be SAF.

  • 2030: The minimum SAF share increases, including specific subtargets for synthetic aviation fuels.

  • 2050: At least 70% of aviation fuel supplied at EU airports must be SAF, with approximately 35% as synthetic aviation fuels.

  • 31 March each year (from 2025): Aircraft operators must submit annual verified reports on fuel uplift and SAF usage.

These milestones are designed to ensure a progressive shift toward cleaner aviation fuel and align the sector with the EU’s net-zero objectives.

Current Status

ReFuelEU Aviation is fully adopted and in force across the European Union. The regulation was approved in 2023 as part of the Fit for 55 package, the EU’s broader climate policy framework. The main compliance phase begins in 2025, when SAF blending and reporting obligations become mandatory. Airlines, fuel suppliers, and airports are preparing to implement monitoring and verification systems, while Member States are setting up national enforcement mechanisms. The regulation plays a central role in reducing aviation emissions, stimulating the SAF market, and supporting the EU’s target of climate neutrality by 2050.

Penalties for Non-Compliance

Each EU Member State must establish effective, proportionate, and dissuasive penalties for non-compliance. These may include administrative fines for failing to meet blending or reporting obligations, temporary restrictions on fuel supply, or the revocation of operating authorizations in severe cases. The European Commission oversees compliance reporting to ensure consistent implementation across Member States.

Examples of Known Violations

As of today, there are no public enforcement cases under the ReFuelEU Aviation Regulation, as the main obligations will apply from 2025 onward. Compliance monitoring and audits will begin once annual reports are submitted by fuel suppliers and aircraft operators.

Resources

Maílis Carrilho
Written by:
Maílis Carrilho
Sustainability Research Analyst
Maílis Carrilho is a Sustainability Research Analyst (Intern) at Net Zero Compare, contributing research and analysis on climate tech, carbon policies, and sustainable solutions. She supports the team in developing fact-based content and insights to help companies and readers navigate the evolving sustainability landscape.