European airlines appear to have exceeded the EU’s first-ever mandatory sustainable aviation fuel blending target for 2025, according to regulatory officials and industry sources. The 2% minimum share requirement, which took effect last year under the ReFuelEU Aviation regulation, was designed as the opening step in a decades-long effort to cut aviation’s carbon footprint. Early indications that the sector cleared the bar on its first attempt have drawn attention from policymakers and fuel producers alike, but the official verified data will not arrive for months, and the system-wide achievement may be hiding sharp disparities between member states.
What the 2% Mandate Actually Requires
The legal foundation for the blending obligation is set out in Regulation (EU) 2023/2405, adopted by the Council of the European Union in October 2023. The law places the duty squarely on aviation fuel suppliers, not airlines themselves, requiring them to ensure that at least 2% of the jet fuel they deliver at EU airports qualifies as sustainable aviation fuel, or SAF. That obligation kicked in on January 1, 2025, and is set to rise in stages over the coming decades.
Compliance is measured through a weighted-average, system-wide approach rather than airport-by-airport checks. That distinction matters because it allows fuel suppliers to over-deliver SAF at some airports while falling short at others, so long as the EU-wide total meets the threshold. The European Commission’s flexibility mechanism report spells out how this balancing act is intended to prevent local shortages during the 2025 to 2034 period without letting the aggregate target slip.
Under this approach, fuel suppliers can pool their obligations across the internal market. A company that supplies large hubs with ample access to SAF can effectively compensate for lower blends at smaller or more remote airports, at least during the early years of the mandate. That design is meant to smooth the transition, but it also makes it harder for the public to see where, and for whom, the climate benefits are actually materialising.
Signals of Early Success
“We will end at above 2% in Europe for 2025. We see a clear supply response to the mandate,” a person familiar with the matter told Reuters in late March 2026. A separate regulatory official confirmed that Europe’s aviation sector hit, and may well have surpassed, the 2% mandate for green jet fuel use in 2025.
The European Commission itself signaled confidence earlier, stating that the industry was on track to meet the 2025 target. That assessment, published alongside interpretive guidance on ReFuelEU implementation, came before full-year data had been collected, relying instead on supply-side trends and preliminary reporting from fuel providers. It amounts to a strong institutional signal but not yet a certified result.
Industry sources point to a combination of long-term offtake agreements, public subsidies, and reputational pressure on airlines as drivers of the early overshoot. Some carriers began blending SAF above the mandated level at key hubs even before 2025, aiming to secure scarce volumes and position themselves as climate leaders. Fuel producers, for their part, have treated the 2% floor as a bankable demand signal, justifying investments in new production capacity that were not viable when SAF uptake depended solely on voluntary commitments.
Baseline Data and the Verification Gap
The European Union Aviation Safety Agency published its first annual technical report under ReFuelEU in 2025, reviewing 2024 data to establish a pre-mandate baseline. That report contains total fuel uplifted quantities, the number of suppliers involved, concentration of supply across member states, and a reported SAF share for 2024. It does not, however, contain verified 2025 compliance figures.
The next annual report, built from 2025 data, will be the document that formally assesses whether the first blending mandate was met. According to a Commission news release, that assessment is the explicit purpose of the upcoming cycle. Aircraft operators submit verified templates through EASA’s Sustainability Portal, and fuel suppliers follow a parallel monitoring, reporting, and verification process that EASA administers. Until those submissions are collected, audited, and published, the claim that the sector exceeded 2% rests on preliminary statements and source accounts rather than certified records.
This verification gap matters for credibility. ReFuelEU relies on robust tracking of fuel quantities, sustainability characteristics, and life-cycle emissions to ensure that reported SAF use corresponds to real climate benefits. Any discrepancies uncovered in the first full compliance review, whether due to accounting errors, misclassification of fuels, or simple data gaps, could revise the apparent performance of the sector and influence how strictly regulators enforce future targets.
Uneven Supply Raises Harder Questions
Even if the aggregate number clears 2%, the distribution of SAF across the EU member states is far from uniform. EASA’s baseline report for 2024 flagged concentration of supply in a limited number of countries, meaning that a handful of large fuel hubs could be doing the heavy lifting while airports in smaller or less-connected markets see little SAF at all.
The flexibility mechanism is designed precisely for this situation, letting the system absorb geographic imbalances without penalizing individual suppliers who cannot source SAF locally. But that design choice creates a tension: system-wide success can coexist with regional failure. Airlines operating primarily from airports in under-supplied member states may face higher costs or logistical friction if they try to secure SAF voluntarily, and passengers at those airports gain no direct environmental benefit from the mandate’s headline achievement.
This pattern deserves more scrutiny than it has received. Much of the early commentary has treated the likely exceedance of 2% as straightforward good news. A more careful reading suggests the result may reflect the economics of a few large refineries and well-positioned fuel suppliers rather than a broad market shift. If SAF production remains concentrated, the ramp-up to higher targets will stress the system in ways that a comfortable first-year result does not reveal.
Steeper Targets Ahead
The ReFuelEU framework lays out a ramp-up trajectory that grows significantly after the initial 2% step. The minimum share of SAF in aviation fuel is scheduled to increase in multiple stages over the coming decades, with additional sub-targets for more advanced fuels such as synthetic kerosene produced from renewable electricity. Each increment will require not only more production capacity but also broader geographic diffusion of supply.
Policymakers argue that the early overshoot of the 2% mandate is a promising sign that the market can respond to clear regulatory signals. Yet the challenge is non-linear: moving from a niche share to a mainstream fuel component will test feedstock availability, refining infrastructure, and the willingness of airlines and passengers to absorb higher costs. If the current pattern of concentration persists, later milestones could expose bottlenecks that are not visible in the first years of implementation.
For now, the emerging picture is one of cautious optimism tempered by structural questions. Europe’s aviation sector appears to have met, and possibly exceeded, its inaugural SAF mandate. This validates the basic design of the regulation and sends a positive signal to investors. But until verified 2025 data are published and the distributional effects are fully understood, policymakers will have to resist the temptation to declare unqualified victory. The success of ReFuelEU will ultimately be judged not by a single percentage point in a single year, but by whether it can drive a sustained, equitable transformation of the fuel mix that powers flight across the continent.
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*This article was researched with the help of AI, with human editors creating the final content.
