EU ETS and the Charter Party: Who Absorbs the Allowance Cost When the Contract Is Silent

EU ETS has applied to shipping long enough that the initial shock has passed. The unresolved question is narrower and more expensive than the headline: when a charter party does not say who pays for allowances, the cost lands by default rather than by agreement. That is where time charterers, voyage charterers and owners are still in dispute.

The regulation puts the surrender obligation on the shipping company, effectively the ISM manager. But it also permits contractual pass-through, so the allowance cost lands on whoever the charter party says it lands on. A large share of charter parties say nothing, because they were signed before the regulation applied. Silence is not neutral. It hands the question to the default rule, and the default rule was not what either side priced when they fixed.

This is the real tension in the chain. The owner holds the legal obligation but can pass the cost on. The charterer benefits from the voyage but may never have agreed to carry the carbon. Between them sits a contract that, in most legacy cases, does not resolve it.

Where the cost actually lands

• •Legacy fixtures without pass-through clauses. If the charter predates 2024 and does not address ETS, the default position in most common-law jurisdictions is that the shipowner absorbs the cost. That is not always what was commercially intended, and the disputes are stacking up.
• •Partial-voyage exposure. ETS applies to 100% of intra-EU voyages and 50% of voyages into or out of an EU port. A ballast leg from Singapore to Rotterdam and a laden leg from Rotterdam to Houston carry different ETS profiles. Treat the voyage as a single average and you have mispriced the allowance cost.
• •Off-hire and pass-through gaps. If a vessel is off-hire during an EU voyage, the contract often does not say who pays for the allowances consumed in that period. Owners argue the charterer benefited from the voyage. Charterers argue they were not on hire. Both positions hold, depending on the wording, which is the problem.

What the next fixture has to settle

• •Explicit pass-through language. The clause has to specify who pays the allowance cost, how it is calculated, what verified fuel data is used, and what happens when the verified number disagrees with the noon-report number.
• •Access to the emissions data. A charterer paying for allowances is entitled to the data behind the calculation. If the owner's reporting system cannot produce verified emissions by voyage leg, the dispute is already built in.
• •Treatment of pool and flex decisions. If the owner pools the vessel for FuelEU compliance, the charterer's ETS exposure interacts with that decision. Most contracts say nothing about it, and they need to.

ETS has turned every EU voyage into a financial reconciliation event. Charterers are now settling allowance costs monthly, sometimes on fuel data they cannot fully verify, across fleets where reporting quality varies vessel to vessel. The person reconciling that figure is rarely the person who signed the fixture, and the gap between the two is where the cost gets argued.

The fixtures being signed in 2026 read differently from the ones now being unwound in dispute. The difference is not sophistication. It is that the newer contracts decide the question the older ones left to the default rule. For a charterer, the lesson follows directly from the evidence: price the allowance before the fixture, or accept whatever the contract's silence decides for you.