Airlines Must Buy SAF. Supply Can't Keep Up. That's the Opportunity.
EU law now forces a fast-rising share of the fuel airlines buy to be sustainable aviation fuel. A mandate can create demand overnight; it can't create the factories, the feedstock or the fuel.
The answer, before the argument
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The market is compulsory.
EU law fixes the SAF share at 6% of all jet fuel in 2030, 20% in 2035 and 70% by 2050 - a trajectory independent of airline preferences, voluntary targets or economic incentives. -
Production remains structurally insufficient.
The EU entered the mandate era supplying just 0.6% of its jet fuel as SAF - a third of the opening 2% obligation - and the pathway behind nearly all of it is capped at 4–8% by its own raw material. The technology is proven - the supply chain is not. -
The penalty mechanism sustains the premium.
Missing the obligation costs at least 2× the SAF-to-fossil price gap - and the tonnes are still owed in the next period. Obligated buyers compete for the limited compliant supply rather than opting out. -
Early adopters benefit most from the ramp-up.
Mandated demand more than triples between 2030 and 2035 - from 6% to 20% - so new capacity in the 2030s enters a legally induced shortage, not an oversupplied commodity environment. -
Feedstock availability is the decisive bottleneck.
A conversion plant is built in 2–3 years; a full biomass base takes 8–10. Technology can be licensed and facilities financed - the feedstock cannot be rushed.
The blindspot
A legally forced, structurally short market where the buyer must pay whatever it takes to avoid a penalty.That is not a normal commodity market. It is a seller's market by law - and a diamond of an opportunity.
Demand is the law
The buyer cannot walk away
Under ReFuelEU Aviation, all fuel supplied at EU airports must contain a rising share of SAF, and every operator departing an EU airport is bound by it. And the mandated fuel is not a little dearer. It is multiples dearer.
Conventional jet fuel
€640 baseline per tonne · EASA 2025 ref.Bio-based SAF · HEFA
€1,925 ≈ 3× per tonne · EASA 2025 ref.Advanced aviation biofuel
€2,760 ≈ 4× per tonne · EASA 2025 ref.Synthetic SAF · e-SAF
€7,520 ≈ 12× per tonne · EASA 2025 ref.| Year | Minimum SAF share | of which e-SAF |
|---|---|---|
| 2025 | 2% | - |
| 2030 | 6% | 1.2% |
| 2035 | 20% | 5% |
| 2040 | 34% | 10% |
| 2045 | 42% | 15% |
| 2050 | 70% | 35% |
Non-compliance costs more still. Miss the obligation and the penalty is at least twice the SAF-to-fossil price gap, charged on every missing tonne. And paying it does not clear the debt: the missing volume must still be supplied in the next reporting period, on top of that year's new obligation.
penalty, per missing tonne
the SAF/fossil price gap - and the tonnes are still owed the next period
Buy the SAF.
Or pay more - and still owe the SAF.
The regulation leaves no economic escape route: the penalty exceeds the premium, so the entire obligated market bids for whatever compliant fuel physically exists.
The supply crisis
The gap nobody has closed
So can the market produce what the law demands? Not remotely - and the shortage is worldwide, so the EU cannot simply import its way out. The gap is widening, not closing.
~1.9 Mt of SAF worldwide in 2025, growing to only ~2.4 Mt in 2026 - growth is slowing, not accelerating. That entire world output is under a third of what the EU alone will need in 2035.
Food crops are excluded and waste lipids are capped - only non-food cellulosic biomass counts. The EU's 2035 mandate alone will swallow ~75 Mt of it a year, from a base that barely exists today.
IATA says airlines have no realistic chance of even 10% SAF by 2030.
Aviation's free EU carbon allowances end in 2026. Every tonne of fossil jet burned emits ~3.16 t of CO₂ - priced under the EU ETS, the fossil baseline rises just as the SAF obligation ramps.
Here is the strange part: guaranteed demand, premium prices, a penalty backstop - every incentive a producer could ask for - and still no supply boom. Something else is holding it back.
The dead end
Every obvious route is a dead end
Nearly all SAF today is HEFA, refined from used cooking oil and waste fats - and that feedstock is close to its physical limit. You cannot fly the world on chip-fryer oil.
the HEFA ceiling
the share of jet-fuel demand that waste lipids can ever cover (ICCT / Neste) - expected to bite ~2030
So the next feedstock is found by elimination. Four ways to make jet fuel without crude oil - three of them fall away:
HEFA
Waste oils and fats. Today's workhorse - the transition's first step, not its finish.
Capped · 4–8%Food-crop ethanol
Corn, wheat or Brazilian sugarcane: cheap and available - but ReFuelEU excludes food and feed crops. Legally closed.
Barred in the EUe-SAF (PtL)
Green hydrogen + captured CO₂. Mandated from 2030 - far too costly to carry the 2030s on its own.
~10–12× the priceAlcohol-to-Jet
Ethanol from cellulosic biomass - miscanthus, switchgrass - upgraded to jet fuel. ~3–5× now, falling with scale.
Scales on non-food landWhy that crop is miscanthus
The feedstock that solves an aviation-scale, twenty-year, carbon-accountable problem has to be high-yielding, cheap to keep, non-food and genuinely low-carbon. Miscanthus × giganteus - the sterile perennial grass - fits on every axis.
Perennial, 15–25 yrs
One planting yields for decades with low inputs - a feedstock life that matches the mandate horizon.
Non-food land
Grows on marginal, under-used ground - no food conflict, clean sustainability accounting, and a place squarely inside the fuel categories the EU mandate rewards.
High yield, cheaply
Big tonnage per hectare with minimal upkeep - the one factor that decides project viability.
Can go carbon-negative
Carbon banked in roots and soil can outweigh the emissions of the whole supply chain - the finished fuel removes carbon rather than merely emitting less. Study carbon intensity: −9.7 to 39.4 gCO₂e/MJ vs ~89 for fossil jet.
The clock
Time is the only thing you can't buy later
Put a shape on it: one integrated project - a 50,000-hectare miscanthus base feeding a single commercial-scale plant. Start that base now and full output lands in the mid-2030s, exactly as the mandate steps to 20% and HEFA hits its ceiling; wait until the shortage is on the front pages, and the same base lands in the 2040s - a decade into someone else's market.
The build is not one clock but four running in parallel - land, feedstock, plant, output. Three of them are engineering; the feedstock clock is biology - and biology sets the pace.
The money is the easy part - raised on demand, and modest against the plant it feeds. The entry cost that actually binds is the one no cheque covers: the years the crop needs in the ground.
~€4,000/ha to plant, staged across the build
a stable recurring cost for two decades of feedstock
Proof, in real time
Kazakhstan is running the play
The squeeze
Kazakhstan's carriers are bound by ReFuelEU on every EU departure, paying Europe's SAF premium with no way to dodge it - yet the country has no domestic SAF production. For a would-be Europe–Asia transit hub, that is a strategic exposure.
The move
Air Astana and KazMunayGas have co-funded a pre-feasibility study (backed by the EBRD), and KazMunayGas has agreed with LanzaJet to progress an alcohol-to-jet project - targeting the first SAF plant in Central Asia by 2029, on domestically produced ethanol.
The missing piece
ATJ needs ethanol; ethanol needs biomass; and Kazakhstan has vast marginal steppe. A non-food perennial on that steppe is exactly the feedstock the route rewards. The thesis of this page is being built out today. The only open question: where does the feedstock come from, and who started planting in time?
The honest ledger · 08
Cons first, because you'll check anyway
The build cannot be rushed.
Years pass between the first rhizome and full output.High upfront cost.
Establishment plus plant CAPEX runs into the hundreds of millions before the first tonne of fuel.Bulky biomass.
Transport-limited - an economic draw radius of roughly 50–80 km around the plant.Chicken-and-egg.
The plant needs committed feedstock; the grower needs committed offtake. Someone has to move first.Conversion is still scaling.
Cellulosic ATJ has far fewer operating plants than HEFA; execution risk is real.The mandate can be revised.
The scheduled review could tighten it - or loosen it. The case assumes the direction of travel holds.On raw price, it loses.
Against untaxed fossil jet, cellulosic still costs more. The case rests on the mandate and the shortage, not on the oil market.
Who moves now · 09
The starting point is the same for everyone
Airlines & fuel producers
The hedge against a premium that only rises sits upstream - long-term offtake and direct stakes in feedstock, secured before the scramble starts.
Investors
A structural growth story, not a niche - the HEFA ceiling guarantees the pivot to cellulosic. Returns land in the late 2030s; entry is now, while feedstock is cheap.
Governments
You already create the demand - and without domestic supply, your carriers pay someone else's premium on every EU departure. Domestic fuel, jobs and energy security start with backing feedstock a decade early.
Every path begins with one thing: a secured, low-cost, sterile feedstock base - the crop that has to go in the ground first. That is what we do. Zelena Biomasna Energija has grown miscanthus for over a decade, holds traceable Illinois-clone planting stock at programme scale, and runs the machinery and crews to plant it.
FAQ
Frequently asked questions
About 1.9 million tonnes globally in 2025 - just 0.6% of the jet fuel airlines burn, rising to only ~0.8% in 2026, with growth slowing. Net zero by 2050 needs around 500 million tonnes a year; realistic biomass supply tops out near 300 Mt. The shortfall is enormous and structural.
Because almost all of it is HEFA, made from used cooking oil and waste fats - a feedstock capped at just 4–8% of jet-fuel demand and expected to hit its limit around 2030. Getting past that ceiling requires a different feedstock: lignocellulosic biomass, via the alcohol-to-jet route. That is the gap miscanthus fills.
Most alcohol-to-jet fuel today does run on food-crop ethanol - grain in the US, sugarcane in Brazil. In the EU it does not count. ReFuelEU builds on the Renewable Energy Directive, which caps food- and feed-crop biofuels and excludes them from the fuel categories the mandate recognises: eligible SAF must come from wastes, residues or non-food cellulosic material such as miscanthus. The food-crop shortcut is closed precisely where the demand is compulsory.
On price alone, yes - and it does not matter. ReFuelEU removes the choice: a rising share of fuel must be SAF regardless of the premium, and missing the obligation costs at least twice the price gap, with the tonnes still owed the next period. Meanwhile carbon pricing narrows the gap from the other side - aviation's free EU allowances end in 2026. The commercial question is not whether SAF beats kerosene, but who holds compliant tonnes when the mandate steps up.
Not on any timeline the mandate cares about. e-SAF is priced around 12× conventional jet fuel today (EASA 2025 reference), and it scales on green hydrogen and captured CO₂ - infrastructure with a slower, costlier build-out than any crop. That is why the law gives it its own, slower sub-quota: 1.2% in 2030, 5% in 2035, 35% by 2050. Even at the 2050 end-state, roughly half the obligation is expected to be met by biofuel - so cheaper e-SAF later does not remove the need for a cellulosic base now. The two waves stack; they do not replace each other.
Not on today's raw commodity price - cellulosic jet loses to fossil on price alone, and this page does not pretend otherwise. The case is structural: a buyer forced by law, a penalty above the premium, a capped incumbent feedstock, and a decade-long lead time on the only input that scales. Feedstock is also the single largest cost in the chain - which is exactly why the field, not the refinery, decides the economics, and why margins accrue to whoever holds the biomass base. All figures here are conservative and illustrative.
Because a full feedstock base takes eight to ten years to build to output: three seasons per block to reach full yield, plus years of staged planting across 50,000 ha. Start now and full output lands in the mid-2030s - just as the mandate steps to 20% and HEFA hits its ceiling. Whoever planted first owns the supply when the rush begins.
Yes. Alcohol-to-jet ferments the biomass into ethanol and upgrades that into a jet-range fuel, using steps already running at commercial scale. The 2026 University of Illinois study modelled exactly this for miscanthus and switchgrass across a thousand sites.
Potentially carbon-negative. The study found a life-cycle carbon intensity from −9.7 (carbon-negative) to 39.4 gCO₂e/MJ, versus ~89 for fossil jet. “Bio” doesn't automatically mean zero - the score counts the whole supply chain - but miscanthus can reach the negative end because it stores carbon in the soil.
It is the thesis in real time: its carriers pay Europe's SAF premium, it has no domestic SAF, and it is already advancing an alcohol-to-jet plant (Air Astana, KazMunayGas, LanzaJet) targeting Central Asia's first SAF facility by 2029 - with vast marginal land that could supply the feedstock.
A note from us
How we made this, and its limits
We grow and supply miscanthus; we are not an aviation-fuel company. This is our honest attempt to gather the best public research and industry data and present it clearly, with every figure linked to its source below.
We have flagged where a number is an estimate, a range, or an illustrative calculation of our own - the worked example of one plant's feedstock, the entry-cost figures, and the land-requirement calculation especially.
Aviation fuel is a fast-moving, specialist field, and we read it from the outside. Some statements may be incomplete or imprecise, prices and rules change year to year, and the forward projections in particular are forecasts, not facts. Treat this as an informed overview to think with, not the final word - check the primary sources and consult specialists before any decision that rests on these numbers.
Sources
- Bianco, M. F. et al. Co-Location of Cellulosic Bioethanol and Alcohol-to-Jet (ATJ) Production Facilities for Targeted Scale-Up of SAF Production. Environmental Science & Technology (2026). DOI:10.1021/acs.est.5c17460.
- IATA: SAF Production Growth Rate is Slowing Down (Dec 2025); SAF Fact Sheet (2026); Global Feedstock Assessment for SAF (to 2050).
- S&P Global / Fastmarkets: SAF market prices 2025–26 (~$2,181–2,900/t); implied airline price $3,000–3,500/t.
- ICCT / Neste: HEFA lipid ceiling 4–8% of jet-fuel demand.
- Regulation (EU) 2023/2405 (ReFuelEU Aviation): mandate trajectory; anti-tankering; penalty ≥2× the SAF/fossil price gap, with the missing volume still owed the next period.
- EASA, 2025 Aviation Fuels Reference Prices for ReFuelEU Aviation: conventional jet fuel €640/t; bio-based SAF (HEFA) €1,925/t; advanced aviation biofuel ~€2,760/t; synthetic SAF (e-SAF) €7,520/t (~12× conventional).
- The Astana Times / GreenAir News / Aviation Business News: KazMunayGas–Air Astana pre-feasibility (EBRD/ICF); KazMunayGas–LanzaJet ATJ project; Central Asia's first SAF plant targeted 2029.
- Probabilistic TEA of alcohol-to-jet SAF (2025), Environmental Research: Energy, DOI:10.1088/2977-3504/ae7801: MJSP $8.89/gal; ethanol = 75.5% of operating cost; ~2.4 gal ethanol → 1 gal jet.
- US DOE, Pathways to Commercial Liftoff: Sustainable Aviation Fuel: cellulosic-ATJ $4.5–9.6/gal; 8–12 plants for 800–1,200 M gal/yr.
- EU ETS carbon forecasts (Enerdata, GMK Center, ABN AMRO); aviation free allowances end 2026; jet combustion ≈3.16 t CO₂/t. SAF/e-SAF cost decline: EU impact assessment; Stillwater Associates.
- Miscanthus yield/economics: ~15–26 t DM/ha; establishment, harvest and build-rate figures are our own internal project figures (Zelena Biomasna Energija d.o.o.).
- EU aviation fuel volume ~32.1 Mt (2024) and SAF 0.6%: EASA / European Commission ReFuelEU reporting; biomass-per-tonne-SAF and country-area scale comparison are our own illustrative calculation. The ≈€10 bn/yr unsupplied-market figure: the ≥12-point gap at 2035 (20% mandate minus the 4–8% HEFA ceiling, ~3.8 Mt of SAF) priced at the EASA advanced-biofuel reference of €2,760/t; the ≈€0.8 bn/yr current-premium figure: the 2% 2025 obligation (~0.64 Mt) at the €1,285/t gap between the EASA HEFA and conventional-jet references - both our own illustrative calculations. The chart's world-output curve extrapolates IATA production figures at today's slowing pace - likewise illustrative; the ≥12-point (2035) and ~45-point (2050) gap figures follow from the same curve and ceilings against the mandate.
- Directive (EU) 2018/2001 (RED II), Annex IX, and ReFuelEU eligible-fuel definitions: food- and feed-crop biofuels capped and excluded from the SAF obligation; eligible SAF limited to wastes, residues and non-food cellulosic feedstocks.
