What Is FuelEU Maritime?
FuelEU Maritime, formally adopted as Regulation (EU) 2023/1805, is the European Union's most ambitious regulatory instrument for decarbonizing the maritime sector. Earlier regulations focused on monitoring and reporting emissions. FuelEU Maritime sets binding limits on the greenhouse gas intensity of energy used on board ships calling at EU and EEA ports.
The regulation entered into force on January 1, 2025. It applies to the same fleet as the EU MRV regulation: commercial ships of 5,000 gross tonnage and above.
FuelEU Maritime is distinctive for its well-to-wake approach to measuring greenhouse gas intensity. It does not count only the CO2 emitted from a ship's funnel. It looks at the full lifecycle of the fuel. That runs from extraction or production, through processing and distribution, to final combustion on board.
This full-lifecycle method judges a shift from one fuel type to another on its true climate impact. It prevents cases where a fuel looks clean when used but carries a heavy emissions burden from its production.
The regulation sits alongside the EU Emissions Trading System and the EU MRV framework. All three are part of the EU's Fit for 55 legislative package for maritime transport. The ETS puts a price on carbon emissions, and the MRV ensures transparency. FuelEU Maritime drives the actual fuel transition by making ships use progressively cleaner energy.
Together, these three regulations create a broad compliance landscape. Ship operators must navigate it as one unified challenge.
GHG Intensity Targets
FuelEU Maritime sets a reduction path for the well-to-wake GHG intensity of marine fuels that runs to 2050. The starting point is a 2020 reference value of about 91.16 grams of CO2 equivalent per megajoule. Against that value, the regulation mandates a 2% reduction from 2025 and a 6% reduction from 2030. Further reductions follow: 14.5% from 2035, 31% from 2040, 62% from 2045, and 80% from 2050.
These increasingly ambitious targets are designed to give the maritime industry a predictable path for fuel investment and fleet renewal decisions.
The initial 2% and 6% targets can be met with gradual measures. Examples are improved fuel quality, LNG adoption, and biofuel blending. However, the steeper reductions from 2035 onward will need fundamental changes in marine energy. These include hydrogen-based fuels, ammonia, methanol from renewable sources, and potentially on-board carbon capture.
Companies that begin planning their fuel transition strategy now, supported by accurate GHG intensity tracking, will be better positioned to manage the financial impact as targets tighten. The cost of compliance will also interact with EU ETS allowance obligations. This creates a compound incentive for cleaner fuels.
It is worth noting that FuelEU Maritime's GHG intensity metric is conceptually different from the CII rating system. CII measures operational carbon intensity per unit of transport work. It rewards efficient ship operation.
FuelEU Maritime measures the inherent carbon intensity of the fuels used, regardless of how efficiently the ship operates. A vessel could earn an excellent CII rating through slow steaming. It could still fail to meet FuelEU Maritime targets if it burns conventional heavy fuel oil. Both measures must be managed at the same time.
Compliance Mechanisms
FuelEU Maritime provides two flexibility mechanisms to help companies manage compliance across their fleets: pooling and banking/borrowing. Pooling lets a company combine the compliance balances of multiple ships. A vessel with surplus compliance can then offset a vessel with a deficit. A vessel has a surplus when its fuel GHG intensity is below the limit.
This mechanism is especially valuable for operators with mixed fleets. Some of their vessels may already use cleaner fuels while others are still transitioning.
Banking and borrowing provide flexibility over time. If a ship achieves a compliance surplus in one reporting period, the company can bank that surplus. It can then apply the surplus against a deficit in a later period.
Conversely, a company can borrow against future compliance. It takes on a deficit in the current period and must compensate for it in the next. Borrowing is limited to stop companies from putting off their obligations forever. The borrowed amount must be repaid in full in the immediately following period, with a 10% penalty applied.
Companies that cannot achieve compliance through pooling, banking, or borrowing must pay a penalty. It is calculated from the cost differential between the fuel they used and the compliant fuel they should have used. The penalty is built to remove any financial advantage from non-compliance. It makes economic sense to invest in cleaner fuels rather than pay fines.
For fleet managers, understanding and optimizing these mechanisms is essential to minimizing total compliance costs.
How Navatom Supports FuelEU Compliance
Navatom Logbooks records every fuel type consumed across your fleet in the daily fuel consumption reports. It uses the well-to-wake emission factors specified in Regulation (EU) 2023/1805. With them, it calculates the GHG intensity of energy used on each voyage. The platform keeps a catalog of emission factors for conventional fuels, LNG, biofuels, methanol, and other alternative energy sources. It updates these values as the regulation is amended.
So your GHG intensity calculations always rest on the latest regulatory data.
The fleet dashboard displays each vessel's compliance balance in real time. It shows whether the vessel is in surplus or deficit against the GHG intensity limit. Fleet managers can model pooling scenarios to find the best allocation of compliance across vessels. The banking/borrowing tools help plan multi-year compliance strategies.
Before bunkering decisions are made, the platform can simulate how different fuel choices would affect the vessel's compliance position. This makes proactive fuel strategy planning possible.
When the reporting period closes, Navatom generates the required FuelEU Maritime documents. This includes per-vessel GHG intensity reports, fleet pooling arrangements, and banking or borrowing declarations. The platform connects this workflow with your existing EU MRV and EU ETS compliance processes. The same fuel consumption data serves all three regulatory frameworks, without duplication or inconsistency.