SAF Economics & Carbon Trading: What Airport Finance Officers Are Pricing In
Scope & Methodology
This article identifies the structural cost components flowing into airline operating budgets from sustainable aviation fuel (SAF) procurement and carbon compliance across three regulatory regimes: U.S. federal tax incentives, ICAO's CORSIA mechanism, and the European Union's emissions trading and blending mandates. The focus is on first-hand source data from 2024–2026 and the transmission channels through which airline-level costs affect airport finance and rate-setting.
Bottom Line Up Front
Three distinct cost streams are converging into a combined carbon compliance burden for airlines operating internationally:
- SAF premiums of 2–5x conventional jet fuel cost are driving industry-wide costs of $3.6 billion annually, with U.S. federal credits reduced 43% under H.R. 1 (July 2025).
- EU ETS allowances now require 100% auctioning (as of January 1, 2026) at €70–€100/tonne CO₂, creating €70–€100 million annual costs for mid-sized carriers on intra-European routes.
- CORSIA Phase 1 (2024–2026) offsets traded at $21.70–$22.55/tonne CO₂e in 2024–2025 spot transactions, with Phase 2 costs projected at $25–$36/tonne as supply tightens.
Airport directors may wish to monitor how these costs flow through airline route economics, fuel sourcing decisions, and capital requests, particularly the 90% EU fuel uplift rule and ReFuelEU blending mandates (2% in 2025, scaling to 20% by 2035).
Sources & Quality Control
Data sources: IATA (SAF production and pricing, December 2025), ICAO (CORSIA baseline and participant data, February 2026), European Commission (EU ETS allowance phases and ReFuelEU schedules), ICCT and EASA (SAF production costs), CATF and Baker Botts (U.S. 45Z tax credit, February 2026), Argus and Airlines for America (conventional fuel pricing), Azzera, ENGIE, and Sylvera (EEU pricing history and projections).
Verification notes: All facts are anchored to primary regulatory documents or published market data. Price ranges reflect spot market transactions or published auction results; regulatory changes reflect official legislative text or regulatory guidance. CORSIA participation and baseline figures cite ICAO's official dataset. EU allowance pricing sources include exchanges and market analysts active in carbon markets.
2026-03-09 — Rewrote 3 unanchored qualifiers to factual framing with source citations. Removed 2 AI-isms and replaced with precise language.
2026-03-06 — Initial publication.
SAF Production and Pricing: Where the Numbers Stand
Global SAF production reached 1.0 million tonnes in 2024 and doubled to 1.9 Mt in 2025, with IATA projecting 2026 output at 2.4 Mt (December 2025), representing 0.8% of total global jet fuel consumption. For context, conventional jet fuel was trading at $3.24/gallon as of March 3, 2026 (Airlines for America).
SAF trades at a 2–5x premium over conventional jet fuel in mandated markets (IATA, December 2025). On the U.S. West Coast, where spot pricing is reported by commodity brokers,SAF reached prices near $3.50/gallon in early 2026 (Advanced Biofuels USA, March 2026). That price still carries a premium and does not reflect delivered costs at most airports. IATA calculated the industry-wide SAF cost burden at $3.6 billion in 2025, driven by the structural price spread between SAF and fossil-derived jet fuel.
The European Union Aviation Safety Agency (EASA) estimated 2024 SAF production costs at €1,461/tonne for biofuels (primarily HEFA pathway) and up to €7,695/tonne for synthetic e-fuels (ICCT, November 2025). The HEFA pathway—hydroprocessed esters and fatty acids, using waste oils and fats as feedstock—accounts for over 90% of current SAF production (CleanBridge, 2025).
U.S. Federal SAF Incentives
The Section 45Z Clean Fuel Production Credit, which replaced Section 40B beginning January 2025, originally allowed a maximum SAF credit of $1.75/gallon under the Inflation Reduction Act (CATF, October 2025). The "One Big Beautiful Bill Act" (H.R. 1), signed July 4, 2025, reduced the maximum SAF credit to $1.00/gallon and restricted feedstock eligibility to sources grown or produced in the U.S., Mexico, or Canada (CATF, October 2025). IRS proposed regulations issued in February 2026 confirmed the reduced credit amount and clarified that the applicable per-gallon amount is 20 cents, adjusted by the fuel's emissions factor (Baker Botts, February 2026).
CORSIA: How the Offset Math Works
The Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA) is ICAO's market-based mechanism requiring airlines to offset CO₂ emissions growth from international aviation above a defined baseline (ICAO CORSIA). Under ICAO Assembly Resolution A42-22, the baseline is set at 85% of 2019 CO₂ emissions for all State pairs subject to offsetting requirements (IATA CORSIA).
Phase 1 (2024–2026): Voluntary
ICAO calculated the 2019 baseline at 305,522,071 tonnes CO₂ for applicable State pairs, with total 2024 emissions of 361,159,641 tonnes reported by 126 States, producing a 2024 Sector's Growth Factor of 0.15405257 (ICAO/Green Air News, February 2026). Airlines on routes between the 138 participating States offset emissions exceeding this baseline by purchasing CORSIA Eligible Emissions Units (EEUs).
Phase 1 demand is estimated at 146–236 million EEUs based on IATA's September 2025 update, against which 15.8 million EEUs have been publicly issued and confirmed as CORSIA-eligible—drawn entirely from Guyana's ART TREES jurisdictional REDD+ program (Azzera, December 2025). The first Guyana auction in late 2024 priced EEUs at $21.70/tCO₂e, with 11 airlines purchasing 400,000 credits; subsequent 2025 transactions moved to $22.25/tCO₂e in Q1 and $22.55/tCO₂e in Q3 (Azzera, December 2025).