Sustainable aviation fuel (SAF) has moved rapidly from a niche topic to a central pillar of aviation climate strategy. A few years ago, policymakers focused largely on light-duty vehicle electrification as a key (and sole) decarbonization strategy. The term “SAF” didn’t exist. That has now changed. Mandates and incentives now shape nearly every major aviation market, and supply forecasts suggest steady growth through 2030. Yet the optimism that often surrounds SAF obscures a basic structural reality. Technology is not the binding constraint. Policy design is.
Across every major assessment reviewed for a recent report I completed for clients, the same pattern appears. Markets that combine demand certainty with credible long term revenue conditions attract capital and move projects to financial close. Markets that rely on short incentives or incomplete policy frameworks do not. The result is an increasingly uneven global landscape where some regions may scale beyond HEFA SAF while others struggle to secure even modest HEFA SAF volumes. The table below captures the regulatory state of play.
What the Table Actually Shows
Although the table organizes regions into discrete policy categories, it tells a deeper story about how governments are shaping risk and reward in the SAF market. Three themes stand out.
First, demand certainty alone is not enough.
The EU and the UK both create clear demand signals. The difference is that the UK is actively building a revenue support mechanism. Without that second pillar, the EU’s strong mandate does not translate into financing conditions that can support first of a kind (FOAK) synthetic fuel projects. Investors see compliance obligations, but not predictable revenue. This is why Europe remains heavily dependent on imported HEFA fuels and why synthetic sub targets for 2030 are already in doubt.
Second, incentive driven systems introduce volatility that capital markets avoid.
The U.S. relies on tax credits and state level clean fuel programs (primarily California’s Low Carbon Fuel Standard (LCFS)). These tools can stimulate early production, but they do not offer long-term certainty, particularly in the current politically volatile climate. Developers face expiration timelines, fluctuating credit values, and no assurance that incentives will remain aligned with project lifecycles. As a result, investor confidence remains low to moderate even though the U.S. has some of the strongest technical potential for scaling SAF.
Third, emerging markets show promise only when policy aligns with industrial strategy.
Brazil, Singapore and China appear in the table as mixed or export oriented environments. What they share is an advantage in feedstocks and/or industrial coordination, but not yet the demand frameworks that would anchor long term investment. Singapore is moving fastest because it has positioned itself as a regional hub. China has momentum because state direction reduces financing uncertainty. Brazil has resources but lacks binding domestic mandates. These differences explain the uneven investment outlook across the region.
In short, the table is not simply a comparison. It is a map of where capital will and will not flow.
Why Policy Structure Now Matters More Than Policy Ambition
The central policy lesson from the table is that ambition does not equal effectiveness. Mandates can require fuel blending, but they do not guarantee that advanced pathways such as Fischer Tropsch (FT), Alcohol to Jet (AtJ), or power to liquid (PtL) will reach final investment decision. Those pathways depend on predictable revenue over a decade or more. Without that stability, the airlines (and policymakers) will remain dependent on HEFA because it is the only commercially proven option.
This is why regions with high demand certainty but weak revenue certainty, such as the EU, may meet early targets but falter when synthetic fuels are needed. It is also why incentive based regions, such as the US, may under deliver relative to stated national goals even when significant tax credits are available. Policy architecture shapes investment more than policy intent.
What This Means for SAF Supply Through 2030
My analysis shows that SAF is likely to expand through 2030. Most of that growth will continue to come from HEFA because waste lipids remain the only widely available feedstock that can scale under current financing conditions. Advanced pathways are emerging, but their timelines are tied directly to policy reforms.
Europe will meet early blending mandates but will remain dependent on imports until revenue support for synthetic fuels is finalized. The UK will continue to advance because it is pairing a mandate with a price mechanism. The U.S. will grow unevenly and may fall short of federal goals unless Congress extends incentives beyond the current horizon. I don’t see that as very likely in this climate. Asia Pacific will continue developing a regional production base, led by Singapore and China. Brazil and other Latin American countries will expand export oriented production as long as international buyers create reliable demand. The upshot: Regions that align demand certainty with durable price signals will attract capital and scale advanced SAF. Regions that do not will remain limited to HEFA.
The Inflection Point Ahead
SAF is not stalling, but it is not yet on a self-sustaining trajectory either. The next 2-3 years will determine whether the sector transitions from a HEFA-dominated market to a true multi-pathway, multi-feedstock system. This outcome depends on whether governments are willing to create policy frameworks that share risk with developers and provide the long term certainty needed for capital intensive projects.
The table above is a reminder that successful SAF markets do not emerge from ambition alone. They emerge from policy architecture that aligns investor risk with public objectives. The countries/regions that understand this will scale. Those that do not will continue to rely on a narrow set of feedstocks that cannot meet long term needs.
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