CORSIA’s 63M Tonne Shortfall: The Looming Supply Squeeze for Airlines

The arithmetic of the global carbon market is about to collide with geopolitical reality.

As of this morning, March 2, 2026, the international aviation industry has exactly 305 days before it hits a regulatory wall that few are adequately prepared to climb. On January 1, 2027, the Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA) enters Phase 2. This transition shifts the program from a voluntary pilot to a mandatory compliance regime for nearly all nations, including heavyweights like China and India.

The numbers defining this transition reveal a market dislocation of historic proportions. According to data from aviation consultancy IBA, airlines will face a collective offsetting obligation of 79.25 million tonnes of CO2 in 2027 alone.

The problem? The credits don't exist.

Despite a universe of over 4,000 theoretically eligible projects, the volume of credits that have received the necessary host country authorization—the "Letter of Authorization" (LoA) required to export credits under Article 6 of the Paris Agreement—stands at fewer than 16 million.

We are staring at a supply deficit of roughly 63 million tonnes for the first year of mandatory compliance. For carbon market professionals, this is no longer a theoretical "scaling challenge." It is a structural short squeeze that will define pricing, procurement strategies, and balance sheets for the next 24 months.

The 63-Million-Tonne Shortfall

To understand the severity of the crisis, one must look past the "eligible" project lists and focus on "authorized" supply. While registries like Verra and Gold Standard are populated with projects that meet ICAO's technical criteria, these credits are effectively stranded assets without an LoA.

As of February 2026, only a handful of countries out of the 130+ participating in CORSIA have successfully issued LoAs. The vast majority of the current 15.8 million authorized credits come from a single source: Guyana’s jurisdictional REDD+ program.

The mismatch between issuance and industrial demand is stark. VCM.fyi platform data from the last week of February 2026 shows a flurry of retirement activity—including 631 units retired by Lenovo and smaller batches for individual offsetting—but these volumes are rounding errors against aviation’s needs. To meet the 2027 CORSIA demand, the market would need to issue and authorize over 200,000 credits every single day between now and January 2027.

Current issuance rates are nowhere near that trajectory. Sylvera’s modeling suggests that even under a "moderate" scenario—assuming 15 countries authorize credits—total supply by end-2027 would reach only 170–191 million units. That might cover the backlog of Phase 1 (2024-2026), but it leaves the 2027 mandatory bucket empty.

The Price of Procrastination: $346 Million for One Airline

For airline treasuries, this supply crunch is about to monetize into a massive liability.

As we analyzed in our recent coverage of the EU ETS price crash, compliance markets are ruthless when technical factors override fundamentals. But unlike the EU ETS, where regulators can adjust supply, ICAO has no control over sovereign nations issuing LoAs.

MSCI projects that CORSIA-eligible credit prices could surge to $25–$60 per tonne as the deadline looms. Compare this to the current voluntary market average of $4–$6 for standard offsets. We are looking at a potential 900% premium for compliance-grade units.

The impact on P&L is material. IBA analysis indicates that Emirates, with its exclusively international long-haul network, faces compliance costs of up to $346 million in 2027 alone. For context, that figure rivals the list price of a new Airbus A350-1000. For carriers operating on thin margins, a sudden nine-figure compliance bill is not an operational expense; it is a strategic threat.

The "Fresh Start" Fallacy

Last week, we reported on the UN’s first issuance of Article 6.4 credits from a cookstove project in Myanmar. While legally significant, the market must not mistake this milestone for a solution to the CORSIA crunch.

The Myanmar issuance involved a 40% "haircut" on volumes to align with new methodological rigor. While this boosts integrity—a necessary evolution we discussed in our analysis of the Article 6.4 launch—it further constrains volume. The Article 6.4 mechanism is ramping up too slowly to fill the 63-million-tonne gap by next January.

Furthermore, the Integrity Council for the Voluntary Carbon Market (ICVCM) recently approved new methodologies for Puro.earth, Gold Standard, and ACR. However, these approvals often come with conditions that disqualify legacy vintages. For example, Gold Standard’s rice methane methodology approval rendered 50,000 existing credits ineligible for the CCP label.

The trend is clear: Quality is rising, but eligible volume is shrinking. The intersection of these two lines—rising demand and shrinking "high-integrity" authorized supply—is where the price spike lives.

The Geopolitical Standoff

The bottleneck is not technical; it is political. Developing nations (Host Countries) are hesitating to issue LoAs for five key reasons:

1. Capacity: They lack the registry infrastructure to track Corresponding Adjustments.
2. Sovereignty: They want to retain credits for their own NDCs.
3. Price Discovery: They are waiting to see how high prices go before selling.
4. Risk: Fear of authorizing credits that are later deemed ineligible by ICAO.
5. Precedent: Lack of clear examples outside of Guyana.

This hesitation creates a prisoner’s dilemma. Developers won't build without LoAs; countries won't issue LoAs without clear project pipelines and high prices; airlines won't sign long-term offtake agreements at high prices until they are forced to.

Strategic Implications for Market Participants

For Corporate Buyers & Airlines: The window for "wait and see" has closed. If you have compliance obligations in 2027, you are effectively short the market. The premium for "Authorized" status is about to detach completely from the VCM baseline.

• Action: Secure forward contracts with projects in countries that have demonstrated LoA capability (e.g., Guyana, Rwanda, Ghana). Waiting for a flood of supply from Brazil or India in Q4 2026 is a gamble with asymmetric downside.

For Project Developers: The value proposition has shifted. A "Gold Standard" certification is no longer the golden ticket; a government relationship is.

• Action: Shift resources from technical validation to government relations. A project with a mediocre rating but a firm Letter of Authorization is currently more liquid and valuable than a pristine project stuck in a bureaucratic void.

For Traders & Investors: We are entering a period of extreme volatility. The spread between "CORSIA-Eligible" (technically checked) and "CORSIA-Authorized" (politically cleared) will widen drastically.

• Action: Long positions on authorized vintages are the obvious play, but the real alpha lies in identifying the next 2-3 countries likely to break the logjam and issue LoAs. Watch for nations receiving capacity-building grants from the World Bank or heavy diplomatic engagement from IATA.

What to Watch

• April 2026 ICAO Council Meeting: Will they expand eligibility to include more unit types to relieve pressure? (Unlikely, but possible).
• Brazil's J-REDD Moves: Brazil has the volume to break the shortage. Any signal of a federal LoA framework from Brasilia would cool the market instantly.
• The "Corresponding Adjustment" Premium: Watch the price spread between credits with and without LoAs. We expect this to move from a $2-3 premium to a $15-20 premium by Q3.

The 10-month countdown has begun. The aviation sector needs 79 million tonnes. The market has 16 million. The only way to close that gap is through political breakthroughs that haven't happened in five years, all of which need to happen in the next 300 days.

Buckle up.