What Is the EU ETS for Shipping?
The European Union Emissions Trading System is the world's largest carbon market, and since January 2024, it includes the maritime transport sector. Under Directive 2003/87/EC, as amended by the Fit for 55 legislative package, companies operating ships of 5,000 gross tonnage and above that call at EU and EEA ports must participate in the ETS by purchasing and surrendering EU Allowances (EUAs) for their CO2 emissions. Each allowance represents the right to emit one tonne of CO2, and these allowances are traded on the EU carbon market.
The ETS works on a cap-and-trade principle. The EU sets an overall cap on the total amount of greenhouse gases that can be emitted by all sectors covered by the system. Within that cap, companies receive or purchase emission allowances, which they can trade with one another. The cap is reduced over time, ensuring that total emissions fall. For the maritime sector, this means that the cost of emitting CO2 becomes a direct operating expense — and that cost will rise as the cap tightens and allowance supply decreases.
The inclusion of shipping in the EU ETS builds on the foundation laid by the EU MRV regulation , which has been collecting verified emissions data from ships since 2018. The MRV data provides the verified emissions figures that determine how many allowances each company must surrender. Without a complete, verified MRV report, a company cannot calculate or fulfill its ETS obligations. This makes EU MRV compliance a prerequisite for EU ETS compliance.
Phase-In Schedule and Coverage
The maritime sector's inclusion in the EU ETS follows a three-year phase-in schedule designed to give the industry time to adapt. In 2024, companies must surrender allowances covering 40% of their verified emissions. In 2025, coverage increases to 70%. From 2026 onward, 100% of verified maritime emissions are subject to the ETS. This gradual ramp-up allows companies to develop their carbon management strategies, establish allowance procurement processes, and adjust commercial agreements to reflect the new cost reality.
The geographic scope of the ETS determines which emissions count. For voyages between two EU/EEA ports — intra-EU voyages — 100% of the ship's CO2 emissions during that voyage are subject to the ETS. For voyages between an EU/EEA port and a port outside the EU/EEA — extra-EU voyages — only 50% of emissions are counted. Emissions while the ship is at berth in an EU/EEA port are included at 100%. This geographic differentiation means that a company's ETS obligation depends not only on its total emissions but on the trade routes its vessels operate.
The administering authority for each company is determined by the EU member state that has responsibility for the company under the MRV regulation. Companies must open a maritime operator holding account in the EU ETS registry and surrender the required number of allowances by September 30 of each year for the previous year's emissions. Failure to surrender sufficient allowances results in a penalty of 100 euros per tonne of CO2 for each missing allowance, in addition to the obligation to surrender the missing allowances.
Financial Impact and Allowance Management
The financial impact of the EU ETS on shipping companies depends on two variables: the volume of emissions subject to the system and the market price of EU Allowances. Allowance prices are determined by supply and demand on the EU carbon market and have historically shown significant volatility. In recent years, prices have ranged from below 50 euros to over 100 euros per tonne of CO2. For a fleet of even moderate size, the annual ETS cost can run into millions of euros — a material expense that must be reflected in operating budgets, charter rates, and voyage economics.
Effective allowance management requires companies to decide when and how to procure their EUAs. Options include purchasing on the spot market, entering into forward contracts to hedge against price increases, or participating in allowance auctions. The timing of purchases can significantly affect the total cost — buying early in a rising market saves money, while waiting risks higher prices. Some companies are also exploring the allocation of carbon costs to charterers through ETS clauses in charter party agreements, making the polluter-pays principle operational at the commercial level.
Beyond the direct cost of allowances, the EU ETS for shipping creates a financial incentive for emissions reduction. Every tonne of CO2 avoided saves the cost of one allowance, making energy efficiency improvements, slow steaming, and alternative fuels economically attractive in addition to their environmental benefits. Companies that actively manage their carbon footprint can reduce their ETS costs while also improving their CII ratings and FuelEU Maritime compliance position.
How Navatom Manages EU ETS Compliance
Navatom calculates each vessel's EU ETS allowance obligation by connecting verified emissions data from the integrated EU MRV workflow to the ETS compliance module. The platform automatically classifies each voyage by geographic scope — intra-EU, EU-to-third-country, or third-country-to-EU — and applies the 100% or 50% emissions attribution rule accordingly. The current year's phase-in percentage is then applied to determine the actual number of allowances that must be surrendered.
The platform's carbon cost tracking features allow fleet managers to view ETS expenditure at multiple levels — per voyage, per vessel, and across the entire fleet. By integrating with the Bookkeeping and Running Cost modules, Navatom enables accurate allocation of carbon costs to the appropriate cost centers, charter parties, or voyage accounts. This granular cost attribution is essential for companies that need to recover ETS costs from charterers or include carbon charges in freight rate calculations.
Navatom's forecasting tools help finance teams budget for future ETS costs by projecting allowance obligations based on planned fleet operations and configurable carbon price scenarios. The platform models how changes in fleet size, trade routes, speed profiles, or fuel types would affect the total ETS liability, giving management the data they need to make informed strategic decisions. As the phase-in reaches 100% in 2026, this forward-looking capability becomes critical for maintaining financial predictability in an era of rising carbon costs.