EU ETS Shipping Calculator: EUA Liability and Cost

Formula, assumptions, and limits

A ship’s EUA liability is its verified emissions weighted by voyage scope, cut by the phase-in, priced at the market. To calculate it, weight the two emission pools and apply the year’s factor:

E_intra - verified emissions on voyages between EEA ports and at berth in EEA ports, from the MRV report. E_inout - verified emissions on voyages arriving from or departing to non-EEA ports, counted at half. f_year - the phase-in: 0.40 for 2024, 0.70 for 2025, 1.00 from 2026. P_EUA - the allowance price; EUAs trade continuously and EEX auction results are the reference.

The scope follows Directive (EU) 2023/959: cargo and passenger ships above 5,000 GT from 2024, with the emissions data coming from the MRV system the fleet has reported under since 2018. Two boundaries do the most work in practice. The 100/50 split makes routing decisions visible in the bill, and the anti-evasion rule closes the obvious move: for containerships, designated neighbouring transhipment ports (non-EU, within 300 nm, mostly transhipment traffic; East Port Said and Tanger Med under Implementing Regulation 2023/2297) do not count as ports of call, so a call there does not re-split the leg into a cheaper pool. And the gas widening matters from 2026: CH₄ and N₂O join the scope, so LNG-fuelled tonnage whose methane slip was invisible to the 2024-2025 bills pays for it from the current compliance year.

What the calculator deliberately leaves out: offshore ships (in scope from 2027), the general-cargo and offshore 400-4,999 GT MRV-only band, the outermost-regions derogations, and the island and ice-class flexibilities, each of which trims a specific fleet’s bill rather than changing the arithmetic. The surrender mechanics sit outside the math too: allowances are due by 30 September of the following year, and the excess-emissions penalty for missing it (EUR 100 per tonne, indexed to inflation since 2013) does not extinguish the surrender duty.

How to use this calculator

1. Enter the intra-EEA emissions from the verified MRV report.
2. Enter the in/out voyage emissions; the 50 percent weighting is applied for you.
3. Select the compliance year for the phase-in factor.
4. Enter an EUA price; the result reprices live as the market moves.
5. Read the EUAs, the cost, and the phase-in comparison: the same emissions across 2024, 2025, and 2026 rules.

Where each input comes from

• Intra and in/out emissions: the verified annual MRV report the ship files under Regulation 2015/757; the company’s verifier signs the split, and THETIS-MRV is where the filings live.
• Compliance year: the year the emissions occurred, not the year the surrender happens; the 30 September deadline is the following year’s.
• EUA price: a live market figure. EEX auction results are the reference; settlement prices move daily, and a voyage estimate should say which day’s price it used.

Worked example

A ship with 3,000 t CO₂e intra-EEA and 5,000 t on in/out voyages. Scope-weighted: 3,000 + 2,500 = 5,500 t. For 2026 at 100 percent, the full 5,500 EUAs are due; at EUR 80 each, EUR 440,000. The identical emissions in 2024 cost 2,200 EUAs (EUR 176,000) and in 2025, 3,850 (EUR 308,000): the phase-in tripled the bill across two years with no change in the ship’s operation, which is why ETS clauses and voyage pricing had to move faster than the fleet’s actual emissions did. The price is illustrative; the EUA market sets the real one daily. On a container service, the divide-through is how the bill reaches the market: EUR 440,000 across, say, 4,000 TEU of capacity is EUR 110 per TEU before utilization adjustments, the shape of the ETS surcharges carriers publish.

Who carries the cost: the clause layer

The directive bills the shipping company; the market reroutes the money. The surrender obligation sits with the DOC holder, but the directive itself contemplates the cost passing to the entity making the commercial decisions, and the time-charter market answered with ETS clauses: the charterer provides allowances (or their value) for the emissions its employment of the ship causes, period by period, with BIMCO’s emission-allowances clauses as the standard drafting. Voyage chartering internalizes it instead, as an element of freight, which is why ETS surcharges appeared on liner tariffs the way BAF did. The practical consequence for this calculator’s users: the same EUA count gets computed three times, by the company that surrenders, the charterer that reimburses, and the desk that prices the next fixture, and disputes live in the reconciliation between those runs, voyage splits and off-hire periods first.

Common errors

1. Billing all emissions at 100 percent. Only intra-EEA voyages and berth time count in full; in/out voyages count at half, and non-EEA voyages not touching the EEA do not count at all.
2. Using unverified figures. The obligation runs on the verified MRV report; engine-room logs and noon reports feed it but do not replace it.
3. Forgetting the gas widening. From 2026 the scope is CO₂e including CH₄ and N₂O; carrying a CO₂-only figure forward understates LNG tonnage’s bill in particular.
4. Treating the phase-in as a discount on duty. The 40/70 years reduced surrender quantity, not reporting scope; the full verified inventory was reportable throughout.

About This EU ETS Shipping Calculator

The maritime EU ETS turned a reporting regime into a bill: the MRV numbers the fleet has filed since 2018 now price voyages in allowances. Computing that bill the way the directive computes it is this page’s job: verified emissions split by voyage scope, the in/out half-weighting, the phase-in for the compliance year, and the cost at whatever the EUA market says today, for the owner who surrenders, the charterer who reimburses, and the desk pricing the next fixture.

The arithmetic follows Directive (EU) 2023/959 with the MRV regulation as the data source, and the page states the boundaries that trim specific fleets (offshore timing, small-tonnage bands, derogations) rather than silently ignoring them. The surrender calendar is part of the answer too: allowances for a compliance year fall due by 30 September of the next, and the inflation-indexed excess-emissions penalty for missing the date rides on top of, not instead of, the surrender itself.

The chart holds your emissions constant and replays them across the phase-in years, which is the cleanest way to see what the schedule did to voyage economics. For the fuel-side twin regulation, the FuelEU GHG intensity calculator computes the intensity the energy mix attains, and the compliance balance calculator prices its penalty; the ocean freight cost calculator carries the resulting surcharges on the commercial side.

Further reading

• EU ETS for shipping
• EU MRV Regulation 2015/757
• EUA market mechanics for shipping
• FuelEU GHG intensity calculator
• FuelEU compliance balance calculator

Frequently asked questions

How does the EU ETS apply to shipping?

Since 1 January 2024, ships above 5,000 GT carrying cargo or passengers surrender EU Allowances for their verified emissions: 100 percent of emissions on voyages between EEA ports and at berth, 50 percent on voyages into or out of the EEA. The obligation phased in at 40 percent of scoped emissions for 2024 and 70 percent for 2025, and runs at 100 percent from 2026.

What is the deadline for surrendering EUAs?

By 30 September of the year following the compliance year, the shipping company surrenders allowances equal to its scoped, phased-in emissions through its administering authority. Missing it costs the excess-emissions penalty, EUR 100 per tonne indexed to inflation since 2013 (roughly EUR 120 in current terms), on top of the unchanged duty to surrender.

Are methane and nitrous oxide covered?

From the 2026 compliance year, yes: the scope widens from CO₂ to include CH₄ and N₂O, reported as CO₂-equivalent under the revised MRV. For 2024 and 2025 only CO₂ counted, which matters most for LNG-fuelled ships, whose methane slip enters the bill from 2026.

Who pays for EUAs, owner or charterer?

The regulation places the surrender obligation on the shipping company (the DOC holder), but the directive expects the costs to pass to the commercial operator under contractual arrangements. In time-charter practice that lands in clauses passing EUA costs to charterers; BIMCO's ETS clauses are the standard drafting.