The EU Emissions Trading System applies to shipping in 2026 by requiring vessel operators to surrender carbon allowances for 100% of emissions on voyages within the European Economic Area and 50% of emissions on voyages entering or leaving EEA ports. This obligation has been phasing in since 2024, and 2026 marks the first year of full surrender requirements for intra-EEA routes. The sections below break down which vessels are covered, how the allowance system works, and what tanker operators can do to manage their compliance costs.
Which ships are covered by the EU ETS from 2024 to 2026?
The EU ETS applies to commercial vessels of 5,000 gross tonnage or more operating in European waters. This includes cargo ships, tankers, container vessels, and passenger ships. Smaller vessels, including most inland waterway craft, fall below this threshold and are not currently subject to maritime ETS obligations. The rules apply to ships calling at ports in any EU or EEA member state, regardless of the flag the vessel flies.
The phase-in schedule has been structured as follows:
- 2024: Operators must surrender allowances for 40% of reportable emissions
- 2025: The surrender obligation increases to 70% of reportable emissions
- 2026: Full obligation applies: 100% of emissions on intra-EEA voyages and 50% on voyages crossing into or out of the EEA
For tanker operators in chemical or oil-based transport, the gross tonnage threshold is the critical factor. If your vessel meets or exceeds 5,000 GT, EU ETS compliance is mandatory regardless of cargo type or route frequency. Operators of smaller tankers or inland barges operating exclusively on domestic waterways should verify their specific classification, as regulatory scope can extend based on port calls and voyage patterns.
How does the EU ETS carbon allowance system work for shipping?
Under the EU ETS, shipping companies must purchase or obtain European Union Allowances (EUAs), where one EUA represents the right to emit one tonne of CO2 equivalent. Operators must monitor and report their verified emissions annually, then surrender a corresponding number of EUAs by 30 September of the following year. EUAs can be purchased on carbon markets, allocated through auctions, or traded between participants.
The shipping sector is integrated into the same ETS market used by power generators and heavy industry, meaning carbon prices are set by overall market supply and demand rather than a shipping-specific rate. This creates direct financial exposure to carbon price fluctuations. When carbon prices rise, the cost of non-abatement increases proportionally, making emissions reduction investments more attractive on a pure cost basis.
Shipping companies are responsible for their own compliance, but the practical administration often falls to the Document of Compliance holder or the entity identified as the “shipping company” under the MRV (Monitoring, Reporting, and Verification) Regulation. For chartered vessels, the contractual allocation of ETS costs between owner and charterer is a growing area of commercial negotiation.
What emissions are counted under the maritime ETS rules?
The maritime EU ETS currently covers CO2 emissions from fuel combustion on covered voyages. From 2024, methane (CH4) and nitrous oxide (N2O) emissions are also included in the scope, reflecting the broader greenhouse gas profile of shipping operations. All emissions are calculated using a fuel-based methodology: operators report fuel consumption, and emissions are derived from established conversion factors for each fuel type.
The geographic scope of what counts depends on voyage type:
- Intra-EEA voyages: 100% of emissions are counted (from 2026)
- Voyages arriving at or departing from EEA ports: 50% of emissions are counted
- Voyages entirely outside the EEA: Not covered by EU ETS
Emissions at berth, while the vessel is stationary in port, are counted as part of the voyage emissions and are not excluded. This is relevant for tanker operators who spend significant time at terminals for loading, unloading, or degassing operations, as that idle fuel consumption still contributes to the reportable total.
How does the EU ETS interact with degassing and port operations?
Degassing operations and time spent in port are not excluded from EU ETS accounting. Any fuel burned during port stays, including auxiliary engines running during cargo operations or degassing procedures, contributes to the vessel’s total reported emissions. This means that longer port turnarounds and inefficient degassing processes carry a direct carbon cost under the current rules.
For tanker operators transporting chemical or petroleum products, degassing is a regulatory and operational necessity before switching cargoes or entering certain terminals. The method used for degassing matters both environmentally and commercially. Open-air degassing releases volatile organic compounds and other gases that, while not all directly captured under ETS accounting, contribute to the vessel’s overall emissions profile and may attract separate regulatory scrutiny under national or port authority rules.
Using certified emission control solutions during degassing reduces the volume of harmful gases released and supports a cleaner operational record. This is increasingly relevant as port authorities and terminal operators tighten their own environmental requirements alongside EU ETS compliance.
What are the penalties for non-compliance with EU ETS shipping rules?
Operators who fail to surrender sufficient EUAs by the deadline face a penalty of €100 per tonne of CO2 equivalent for which no allowance is surrendered. This penalty does not extinguish the obligation: the missing allowances must still be surrendered in the following compliance period. Persistent non-compliance can also result in an expulsion order, where port state control authorities in any EU member state can deny the vessel entry to EEA ports until compliance is restored.
Beyond the financial penalty, non-compliant vessels risk reputational damage with charterers and cargo owners who increasingly require documented ETS compliance as part of their own sustainability reporting. Under frameworks such as the Corporate Sustainability Reporting Directive (CSRD), large companies must account for emissions across their supply chains, which means their shipping partners’ compliance status becomes directly relevant to their own regulatory obligations.
Accurate monitoring and timely reporting are the foundation for avoiding penalties. Errors in fuel consumption data, late submission of verified emissions reports, or failure to open a Maritime Operator Holding Account in the EU Registry can all trigger compliance failures even when the underlying operations are sound.
How can tanker operators reduce their EU ETS cost exposure?
Tanker operators can reduce their EU ETS cost exposure through a combination of operational efficiency improvements, cleaner fuel choices, and verified emissions reductions at source. The most direct lever is reducing fuel consumption per voyage, which simultaneously lowers emissions and the number of EUAs required. Speed optimization, route planning, and hull maintenance all contribute meaningfully to this outcome.
Beyond fuel efficiency, operators should consider the following approaches:
- Alternative fuels: Switching to lower-carbon fuels such as LNG, methanol, or biofuel blends reduces the CO2 emission factor per tonne of fuel burned, directly lowering EUA requirements
- Shore power use: Where available at berth, connecting to shore-based electricity eliminates auxiliary engine emissions during port stays
- Emission control at source: Deploying certified oxidation technology during operations such as degassing reduces the overall emissions footprint associated with port turnarounds
- Contractual ETS clauses: Negotiating clear ETS cost allocation in charter agreements prevents unexpected financial exposure when the vessel is operated by a third party
- EUA procurement strategy: Purchasing allowances in advance during lower price periods, or hedging through carbon market instruments, can reduce the average cost per tonne over time
The shipping carbon cost landscape in 2026 rewards operators who treat ETS compliance as an integrated part of fleet management rather than an end-of-year accounting exercise. Early investment in cleaner operational practices reduces both direct carbon costs and the regulatory risk that comes with last-minute compliance scrambles.
How SuperFlox supports EU ETS compliance for tanker operators
SuperFlox provides tanker operators with a practical, field-proven solution for reducing emissions during degassing — one of the most carbon-intensive and frequently overlooked elements of port operations under the EU ETS. Rather than releasing cargo vapours into the atmosphere through open-air degassing, operators can use SuperFlox’s mobile containerised oxidation units to destroy harmful gases at source, directly reducing the emissions footprint associated with each port call.
Here is what SuperFlox offers in the context of EU ETS compliance:
- Certified emission destruction: SuperFlox units use thermal oxidation to eliminate volatile organic compounds and other cargo vapours, producing a verifiable reduction in harmful releases during degassing
- Flexible, terminal-ready deployment: The containerised format means units can be positioned at virtually any berth or terminal without permanent infrastructure investment, making compliance practical across diverse port rotations
- Support for tightening port requirements: As terminal operators and port authorities introduce their own environmental standards alongside EU ETS, having a documented emission control process in place protects access to key ports
- Contribution to a cleaner operational record: Consistent use of controlled degassing technology strengthens the environmental documentation that charterers and cargo owners increasingly require from their shipping partners
If your fleet operates on EEA routes and degassing forms part of your regular port schedule, contact SuperFlox to find out how their mobile units can be integrated into your compliance strategy ahead of the 2026 full surrender obligations.