
What Is the EU ETS and Why Does It Matter for Aircraft Operators?
An introduction to the EU Emissions Trading System (EU ETS), how it applies to aviation, and why aircraft operators must understand its compliance and financial implications.
Explore the major changes shaping aviation compliance in 2026, including the phase-out of free allowances, sustainable aviation fuel incentives, and new Non-CO₂ monitoring requirements.
By Emissence
The European Union’s aviation climate regulations are evolving rapidly. For aircraft operators, compliance is no longer limited to annual CO₂ reporting. The industry is now facing higher carbon costs, increased sustainability requirements, and the introduction of Non-CO₂ monitoring obligations.
Understanding these changes is essential for managing both compliance risks and operational costs.
Historically, aircraft operators received a portion of their emission allowances free of charge. This approach is now ending.
Under the European Union’s Fit for 55 package, aviation free allocation has been progressively phased out:
As a result, aircraft operators must increasingly obtain allowances through auctions or the carbon market. For many airlines, carbon costs are becoming a significant operational expense that requires active management and forecasting.
Recognising the higher cost of Sustainable Aviation Fuel (SAF), the European Union has introduced support mechanisms through the EU ETS.
The objective is to encourage operators to adopt SAF while reducing the financial burden associated with transitioning away from conventional jet fuel. These incentives are intended to complement the obligations introduced under ReFuelEU Aviation and accelerate the aviation sector’s decarbonisation efforts.
One of the most significant recent developments is the introduction of monitoring requirements for Non-CO₂ aviation effects.
These effects include:
Although these effects are not yet subject to carbon pricing, aircraft operators must begin monitoring and reporting relevant information under the European Union’s Monitoring, Reporting and Verification (MRV) framework.
For many organisations, this represents an entirely new compliance challenge that requires additional operational data collection, quality assurance procedures, and internal reporting processes.
The regulatory landscape continues to evolve as policymakers seek additional measures to reduce aviation’s environmental impact.
Future developments may include:
Operators that invest in strong data management systems, robust monitoring procedures, and proactive compliance programmes today will be better prepared to respond to tomorrow’s regulatory requirements.
The transition from basic emissions reporting to comprehensive sustainability compliance is already underway. Regulatory obligations are expanding beyond carbon accounting and increasingly require organisations to demonstrate transparency, data quality, and environmental performance.
Aircraft operators that proactively assess regulatory changes, strengthen internal controls, and improve emissions data quality will be best positioned to manage future obligations efficiently while minimising compliance risks and costs.
Emissence provides specialist support for EU ETS, UK ETS, CH ETS, CORSIA, ReFuelEU Aviation, and Non-CO₂ MRV requirements.
From monitoring plan development and emissions reporting to verification readiness assessments and regulatory advisory services, we help aircraft operators navigate an increasingly complex compliance landscape.
Contact us at [connect@emissence.com](mailto:connect@emissence.com) to discuss your compliance needs.

An introduction to the EU Emissions Trading System (EU ETS), how it applies to aviation, and why aircraft operators must understand its compliance and financial implications.

Learn which flights and aircraft operators fall within the scope of the EU ETS, including EEA routes, UK flights, Swiss ETS interactions, and key compliance obligations.

The European Commission has published the official 2025 price differences between fossil kerosene and eligible aviation fuels, determining the level of EU ETS support available to aircraft operators using Sustainable Aviation Fuels (SAF).
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