What is driving the shortage of CORSIA-eligible credits in 2026
The shortage starts with a narrow eligibility pool. ICAO’s April 2026 table shows that only selected programmes and vintage windows are eligible for the 2024 to 2026 compliance period, and many programmes are limited to 2021 to 2026 units. Some approvals are still conditional, which tightens the amount of inventory that can actually be delivered.
The shortage is also about rules, not just volume. CORSIA eligibility depends on quality filters, host-country authorization, and anti-double-counting safeguards. That removes a large share of credits that may exist in the market but cannot be treated as bankable for airline compliance.
Demand is rising at the same time. ICAO now reports the first official 2024 growth figures used to calculate airline offsetting requirements, and participation expands to 128 States from 2025. That widens the compliance footprint and makes procurement harder to avoid for global carriers.
Supply-side relief is still slow. ICAO’s 2026 materials show that approvals are being added in stages. New eligible fuel pathways also exist, but they are separate from credit supply and require distinct sustainability certification, so they do not quickly replace offset demand.
For buyers, this creates a liquidity-premium market. The most financeable CORSIA credits are concentrated in a small set of registries and vintages, which is where pricing power and offtake competition tend to appear first.
The real question is whether tighter compliance and higher airline demand will mainly raise aviation costs, or whether they will spill into adjacent carbon-market segments that can absorb displaced demand.
Why tighter compliance rules are pushing airline costs higher now
CORSIA is already moving from policy design into cost realization. ICAO says governments are calculating 2024 growth-based offsetting requirements now, and airlines will need to cancel the appropriate number of units at the end of each compliance period.
The cost burden is already visible in industry outlooks. IATA’s June 2025 outlook said the cost of CORSIA to airlines is expected to reach $1 billion in 2025, while also noting that SAF remains materially more expensive than jet fuel. That keeps the incentive strong to use eligible credits where available.
ICAO’s own review process shows that this is now a market issue as well as an environmental one. Its periodic review explicitly examines supply, demand, price, and cost impacts for the first phase from 2024 to 2026.
Traffic growth adds more pressure. ICAO’s 2024 statistics show 4.7 billion passengers, up 7.9% year on year, while IATA expects global demand to keep growing. More traffic means more future liabilities, and that increases the chance that airline compliance demand outpaces eligible credit supply.
For procurement teams, tighter rules mean more than a larger budget line. They also mean counterparty risk, vintage risk, and delivery-timing risk as buyers look for units that remain CORSIA-eligible through retirement.
That cost pressure sets up the next issue. If the shock is large enough, airlines will not only buy differently, they may hedge differently and redesign procurement strategy altogether.
How a $127 billion cost shock could change airline hedging and procurement
The $127 billion figure is a stress-test style headline, not an ICAO compliance estimate. Even so, it is useful as a B2B scenario for understanding how airline treasuries might react if carbon and fuel-policy costs compound across a 2024 to 2035 horizon.
The strategic shift would likely be from spot buying to portfolio-style carbon procurement. Airlines may combine long-dated offtake, staged purchasing, and registry diversification to reduce basis risk in CORSIA-eligible emissions units.
IATA’s procurement initiatives already point in that direction. Dedicated EEU procurement events show that the market is testing aggregation models that look more like commodity sourcing than ad hoc offset shopping.
A tighter market also pushes buyers to hedge eligibility risk, not just price risk. They need assurance that credits remain eligible under ICAO criteria at retirement, especially when programme rules, host authorizations, or vintage windows change.
Enterprise buyers also care about the plumbing. Registry interoperability, delivery schedules, forward pricing, and the ability to match projected emissions against compliance periods all become more important when supply is scarce.
Once airlines start thinking like structured commodity buyers, the effect extends beyond aviation. Capital begins to move toward other carbon-market segments with better liquidity or clearer compliance utility.
Which carbon market segments may benefit from the aviation squeeze
The most obvious beneficiaries are high-integrity voluntary and compliance-grade registries that can issue CORSIA-eligible units. Scarce aviation demand tends to bid up the value of units with recognized eligibility pathways.
Forestry and nature-based supply could also gain attention, especially REDD+ and jurisdictional programmes. That is most likely where host-country authorization and programme integrity are strong enough to support airline due diligence.
Separate from offsets, CORSIA-eligible fuels and SAF-linked infrastructure may attract capital as airlines look for partial substitution. Fuel pathways and credit pathways are operationally different markets, but both can benefit from the same compliance pressure.
Registries that improve credit-level traceability can capture more institutional volume. Pre-retirement eligibility tagging reduces transaction friction for compliance buyers and traders, which matters when delivery windows are tight.
The squeeze can also spill into adjacent carbon-market liquidity pools. Brokers, exchanges, and structured procurement platforms can all become more important when scarce units need to be intermediated at scale.
That reallocation matters because it shows the real market signal. CORSIA is no longer a niche airline rule. It is a demand anchor that can reprice the wider carbon-credit stack.
What the CORSIA shortage means for credit developers, regulators, and buyers worldwide
For credit developers, the opportunity is to design projects and registries around CORSIA eligibility from day one. Vintage, methodology, host authorization, and documentation requirements all determine whether a unit can actually clear in airline compliance.
For regulators, the shortage increases pressure to align national carbon-accounting rules with international offsetting mechanisms. ICAO and IATA both emphasize the need to avoid double claiming and maintain environmental integrity.
For global buyers outside aviation, the lesson is that CORSIA can act as a price discovery engine for high-integrity carbon credits. It can influence benchmarks, contract structures, and due-diligence standards across voluntary and compliance markets.
For airlines and their suppliers, the shortage strengthens the case for multi-year procurement frameworks, registry diversification, and early reservation of eligible volume rather than waiting for compliance deadlines.
The broader B2B takeaway is simple. CORSIA scarcity may accelerate a shift from fragmented offset purchasing to a more mature carbon procurement market infrastructure spanning developers, brokers, registries, and corporate buyers.
