Why Airlines Are Scrambling for CORSIA-Eligible Credits Before Phase 1 Tightens the Market

What Changed in the CORSIA Procurement Race and Why Demand Is Accelerating

CORSIA has moved from planning to buying. ICAO’s First Phase runs from 2024 to 2026, and airlines are now procuring eligible units before execution risk gets tighter.

The supply pool is still narrow. ICAO has approved eight emissions unit programmes for First Phase supply, so demand is concentrating into a much smaller set of assets than the broader voluntary carbon market.

The numbers explain the rush. IATA estimates First Phase demand at roughly 170 to 236 million EEUs, and its 2026 materials point to compliance costs of about USD 1.2 to 1.6 billion for airlines this year alone.

The buyer base is also becoming more structured. IATA has been running dedicated procurement events and an Aviation Carbon Exchange workflow, which shows airlines are moving from informal sourcing to centralized deal execution.

The real question is no longer whether demand exists. The question is how much of it can be met by credits that clear host-country authorization and CORSIA eligibility filters.

Why Letter of Authorization and Corresponding Adjustment Are Now the Real Price Drivers

The commercial value of a credit now depends on more than vintage and methodology. Buyers are pricing in whether the host country has issued a Letter of Authorization and whether the unit can support a corresponding adjustment under Article 6.

IATA frames corresponding adjustments as the mechanism that prevents double claiming between the airline and the host country. That makes credits with this documentation path more defensible for compliance buyers.

This creates a premium stack. Scarce eligible supply, host authorization, traceability, and registry or issuance confidence all matter. That is why two similar carbon credits can clear at very different levels in B2B negotiation.

Programme documents are also making the host-country evidence trail more explicit. That reinforces the shift from generic offset quality toward compliance-grade documentation and auditability.

Better documentation also makes forward offtakes easier to justify. It can improve secondary-market liquidity too, which is where repricing pressure often shows up first.

How a Long-Surplus Carbon Market Is Being Repriced by Aviation Compliance

CORSIA is importing a compliance premium into a market that has often been oversupplied. Cheap carbon is no longer enough if the unit cannot meet aviation’s legal and documentary standard.

ICAO notes that emissions unit pricing is driven by supply and demand. Aviation demand is now hitting a constrained eligible-supply universe, which is the classic setup for repricing.

IATA’s 2026 figures show the industry’s CORSIA bill rising materially. That suggests the market is shifting from broad buyers’ market behavior toward a more selective, compliance-led procurement regime.

The spread between voluntary credits and CORSIA-eligible EEUs is now economically meaningful. Not all tonnes are interchangeable, and the difference reflects regulatory usability as much as climate integrity.

Deal structure matters more in that environment. Spot purchases, pre-purchase agreements, and forward offtakes will not all clear at the same discount or premium.

What the Econetix Deal Signals About Liquidity, Deal Size, and Buyer Strategy

The Econetix transaction is best read as a market signal. Buyers are using structured deals to secure access to scarce CORSIA-eligible supply before the best inventory gets absorbed by early movers.

Deal size matters because airlines generally want structures that reduce execution risk, registry risk, and delivery risk at the same time. That becomes more important as compliance windows approach.

Liquidity is no longer just a secondary-market issue. It is becoming a sourcing advantage, with intermediaries and platforms able to aggregate units, standardize documentation, and accelerate settlement.

For project developers, the implication is clear. Bankable supply chains and pre-agreed eligibility pathways are more valuable than raw volume alone, because buyers increasingly pay for certainty of delivery rather than theoretical tonnes.

This also points to a strategic shift in buyer behavior. Airlines are not waiting for a perfect market. They are securing option value now.

Who Is Best Positioned to Supply CORSIA-Eligible Credits at Scale

The best-positioned suppliers are not simply the largest credit generators. They are the project developers and programmes that can deliver CORSIA eligibility, host-country authorization, and traceable issuance at scale.

ICAO’s approved-programme list shows a relatively concentrated market. Major pathways include Gold Standard, Verra VCS, Climate Action Reserve, ACR, GCC, and a limited number of other approved schemes.

That concentration creates a real bottleneck for large buyers. The eligible universe is much smaller than the wider voluntary market.

Host countries with faster LoA processes and more mature Article 6 implementation can become preferred sourcing jurisdictions. They reduce transaction friction and improve deliverability for airlines.

The alliance-building around CORSIA supply suggests the next competitive edge will come from coordination, not just project pipeline size.

For brokers and aggregators, the winning model is likely to combine origination, documentation, registry operations, and buyer financing into one execution layer.

What This Means for Airlines, Brokers, and Project Developers Heading Into Phase 1

Airlines entering the back half of First Phase should treat CORSIA procurement as a compliance program, not a discretionary sustainability purchase. The cost and supply constraints are now visible.

Brokers that can source eligible supply, package LoAs, and manage delivery certainty will capture share as airlines look for lower-execution-risk routes to compliance.

Project developers should expect stronger negotiating power if they can offer corresponding adjustment readiness, registry transparency, and deliverable volumes in the right vintages for First Phase needs.

Buyers should secure volume early, diversify across approved programmes, and avoid overreliance on any single host country or issuance channel.

The broader market conclusion is simple. CORSIA is becoming the price-setting layer for a subset of carbon credits, and that shift is likely to reshape liquidity, contract design, and market power before Phase 1 closes.