Aviation has started buying crops. Not in volumes that move the price tomorrow, but on a trajectory already showing up in processor and cooperative planning. Global production of sustainable aviation fuel is expected to reach roughly 2.4 million tonnes in 2026, equal to 0.8% of all jet fuel consumed during the year.
Small as a share, fast in growth: output jumped from 1 million tonnes in 2024 to 1.9 million in 2025. Growth slows in 2026, but the installed base is no longer experimental.
Two routes, two completely different impacts at the farm gate
More than 90% of the SAF produced in 2026 comes from two pathways: HEFA, which uses oils and fats, and ethanol-to-jet, known as ETJ. The choice between them decides who wins at the field level.
The land use efficiency contrast is stark. Producing three billion gallons of SAF from soybean oil alone would require around 40 million acres of soybeans. The same volume via the corn ethanol route would need roughly nine million acres in 2030.
Translated for growers: the ethanol pathway is far more land-efficient, which makes it more likely to scale. That structurally favours corn and, by extension, everything orbiting it — including co-products, since every litre of ethanol produced generates distillers grains for animal nutrition.
Policy moved the board
The U.S. SAF Grand Challenge, launched in 2021, targets 3 billion gallons by 2030 and 35 billion by 2050, with at least a 50% reduction in lifecycle emissions. The goal remains on paper, but political enthusiasm shifted: the current administration has not embraced the programme with the same emphasis, and Congress cut the 45Z production tax credit for SAF from US$1.75 to US$1.00 per gallon.
Cutting the incentive slows investment in new plants. That is why the growth projection for 2026 is more modest than 2025’s. Anyone building a business model on the full credit had to redo the numbers.
Brazil legislated its own rule
While the U.S. debate wobbles, Brazil legislated. The Fuel of the Future law created a national sustainable aviation fuel programme with progressive emission reduction targets on domestic flights beginning in 2027.
That matters for a simple reason: the country has the most competitive ethanol chain in the world and has been aggressively expanding corn-based production across the Centre-West. Companies such as Raízen, FS and Inpasa already operate or have announced projects tied to renewable fuels, and the ETJ route finds in Brazilian corn ethanol one of the cheapest feedstocks available anywhere.
Internationally, LanzaJet is the company that took ethanol-to-jet to commercial scale, while Neste remains the largest producer via the HEFA pathway.
What changes for grain producers
An additional demand floor. Ethanol destined for aviation competes for the same corn that goes into feed and exports. Local industrial demand reduces port dependence and improves regional basis, particularly in areas far from the coast.
Low-carbon practices gain a price. SAF eligibility depends on demonstrated lifecycle emission reductions. That means the carbon intensity of delivered grain acquires commercial value. No-till, efficient nitrogen use, renewable energy in drying and origin traceability stop being talking points and become price variables.
A new kind of contract. Supplying a plant that produces certified fuel usually requires management documentation. Growers who already organised data for export environmental requirements start ahead.
Concentration risk. A new plant changes the logic of an entire region. That is good while it runs well and bad if policy shifts and the project stalls. Depending on a single industrial buyer carries the same risk as depending on a single port.
The co-product is half the business
Anyone looking at a corn ethanol plant purely as a grain buyer is missing half the equation. Every tonne processed returns distillers grains, wet feed and corn oil — inputs that supply feedlots, poultry and swine operations in the same region.
That creates a meaningful local linkage effect. In parts of Brazil’s Centre-West that historically exported corn and imported protein, the arrival of processing reversed part of the flow: grain began to be processed near where it is grown, and the co-product lowered ration costs for neighbouring livestock.
For the grain producer the gain shows up two ways. First in basis, because part of the freight to port disappears. Second in stability, since a plant buys across the whole year rather than only in the harvest window, when everyone is trying to sell at once.
What could still go wrong
Three risks deserve honest attention. The first is regulatory: a cut incentive, as happened with the U.S. credit, freezes investment and postpones announced plants. The second is technical: the ethanol-to-jet route still has few units at full commercial scale, and industrial learning curves usually run longer than the promised schedule.
The third is reputational. Part of the scientific community questions the real emissions balance of crop-based pathways, particularly once indirect land use change is counted. That debate is not noise — it determines which feedstocks stay eligible in the next round of rule revisions, and therefore who gets to sell.
How to separate a trend from a fashion
Sustainable aviation fuel is not going to consume the corn crop. In 2026 it accounts for under 1% of global jet fuel. What it does is create a second industrial demand leg for a grain that already had fuel ethanol, feed and exports pulling on it.
For growers the sensible posture is to follow it without reorganising the farm around it. Switching crops on a SAF bet is not warranted. Starting to document management practices rigorously is: the next generation of contracts will ask about the carbon intensity of what you deliver — and whoever lacks the data will sell at plain commodity price while the neighbour sells at a premium.
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