Complete Compliance Guide

FuelEU Maritime Regulation Guide

EU Regulation 2023/1805 explained end-to-end — GHG intensity limits, penalty structure, pooling, compliance timeline 2025–2050, Well-to-Wake calculation, and the fuel pathways that matter for LNG operators.

EU Regulation 2023/1805
Effective 1 Jan 2025
Annex II WtW

What is FuelEU Maritime?

FuelEU Maritime (Regulation EU 2023/1805) sets mandatory Well-to-Wake GHG intensity limits for fuel used on ships calling EU ports. Effective from 1 January 2025. Applies to all vessels ≥5,000 GT on voyages to, from, or between EU ports.

Unlike EU ETS which puts a price on carbon, FuelEU sets a HARD LIMIT on GHG intensity of the fuel mix. Ships must maintain average annual intensity below the year-specific limit or pay a penalty of €2,400 per tonne of VLSFO-equivalent fuel needed to reach compliance.

Well-to-Wake methodology means the entire fuel lifecycle counts — upstream extraction/production emissions + combustion emissions, with CH₄ (methane slip) and N₂O converted to CO₂-equivalent. This is stricter than IMO CII which uses Tank-to-Wake CO₂ only.

GHG intensity targets

Baseline: 91.16 gCO₂e/MJ (2020 average of fossil marine fuels). Reductions apply to the annual company average across all EU-relevant voyages.

2025
89.34
-2%
2030
85.69
-6%
2035
77.94
-14.5%
2040
62.90
-31%
2045
34.64
-62%
2050
18.23
-80%
Watch out: HFO (91.70 gCO₂e/MJ) and VLSFO (92.99) already exceed the 2025 limit. Operators running conventional fuel are non-compliant from day one and generate deficit.

WtW factors by fuel type

gCO₂-equivalent per MJ of fuel from Annex II of Regulation 2023/1805. LNG on 2-stroke engines is favourable; LNG on Otto-cycle (methane slip) is barely.

HFO
91.70
gCO₂e/MJ
VLSFO
92.99
gCO₂e/MJ
MGO/MDO
92.70
gCO₂e/MJ
LNG · 2-stroke
76.40
gCO₂e/MJ
LNG · DFDE
82.40
gCO₂e/MJ
LNG · Otto
90.60
gCO₂e/MJ
Bio-Methanol
15.40
gCO₂e/MJ
Ammonia · Blue
62.00
gCO₂e/MJ
Ammonia · Green
4.00
gCO₂e/MJ
e-Diesel
3.00
gCO₂e/MJ

Penalty structure

Penalty = €2,400 per tonne of VLSFO-equivalent fuel needed to reach compliance. Formula from Annex IV:

Penalty € = |Compliance Deficit in gCO₂e| × 2,400 / (LCV_VLSFO × Ref_intensity) = |Deficit| × 2,400 / (41,000 × 91.16)

Typical LNG voyage of 150 million MJ with 10 gCO₂e/MJ deficit → ~€960k penalty per voyage. Fleet-wide annual exposure for a 6-vessel LNG operator running conventional fuel: €50-100M.

Track FuelEU compliance across your entire fleet

VEMO FuelIQ calculates GHG intensity per voyage, projects annual deficit, and models pooling arbitrage across all your vessels.

Start Free Trial →

Pooling — the deficit escape hatch

Ships within a pool aggregate their compliance balances. A surplus ship (below the limit) transfers excess compliance to a deficit ship (above the limit). Pools must be registered with a verifier by 1 March of the reporting year.

Pooling reduces overall penalty exposure without altering the physical fuel used. Operators with a mixed LNG + conventional fleet can pool the LNG intensity-favourable vessels against the conventional deficit vessels.

Additional flexibility: borrowing — max 2% deficit borrowed from next reporting year (repay 1.1×) and banking — surplus carried forward.

Frequently asked questions

What is FuelEU Maritime?
EU Regulation 2023/1805 sets mandatory Well-to-Wake GHG intensity limits for fuel used on ships calling EU ports. Applies from 1 January 2025 to all vessels ≥5,000 GT.
What is the FuelEU penalty?
€2,400 per tonne of VLSFO-equivalent fuel that would have been needed to reach compliance. Penalties deposited into an EU Ocean Fund supporting maritime decarbonisation.
Does FuelEU use Tank-to-Wake or Well-to-Wake?
Well-to-Wake (WtW). Includes upstream production + combustion. Stricter than CII which uses Tank-to-Wake CO₂ only. This is why methane slip on LNG-Otto engines dramatically increases FuelEU intensity but is invisible to CII.
How does pooling work?
Ships within a pool aggregate their compliance balances. Surplus ship transfers excess compliance to deficit ship. Pools must be registered with verifier by 1 March. See our FuelEU intensity calculator to model your pool math.