Spend any time inside a logistics department this year and a new line item keeps surfacing on every Asia–Europe freight quote. Sometimes it's labeled EU ETS, sometimes EMS, sometimes ESS, sometimes “energy transition surcharge.” Whatever the name, the number is bigger than it was twelve months ago — in some lanes 40 to 50 percent bigger. That increase is not a fuel cost or a fee invented by the carriers. It is the European Union's carbon market, the EU Emissions Trading System, finally taxing shipping at the full rate it was designed for. The phase-in is over. 2026 is year one of the real thing.
The mechanics are not complicated, but they have enough corners — what counts, who pays, how the percentages and surcharges connect — that a lot of shippers are surprised when they see the first invoice. Let's walk through the system the way the rulebook actually reads.
The basic idea — a carbon market, not a carbon tax
The EU ETS is often described loosely as a carbon tax, but legally it isn't one. It is a cap-and-trade market.
Think of it like ration coupons. Each year the EU prints a strictly limited number of coupons — one coupon gives the holder the right to emit one tonne of CO₂ equivalent. The total number of coupons shrinks every year, on purpose. Companies that need more coupons than they hold have to buy them on a market; companies that emit less can sell their spare coupons to someone else. The price is set by that market, not by a government rate card. When demand for coupons rises faster than the cap allows, the price goes up. The system makes carbon costly by making carbon scarce.
In the EU's actual wording, those coupons are called European Union Allowances, or EUAs. The EU sets the annual cap, distributes the EUAs (some auctioned, some allocated free to specific industries), and runs the registry where they get bought, sold, and finally surrendered to cover real emissions. Operators that come up short on surrender day pay a €100-per-tonne fine and still have to find the missing allowances afterward.
Because the cap shrinks every year and the market sets the price, the cost of carbon is volatile by design. In May 2026 the EUA price has been trading in the €74 to €77 per tonne range. Two years ago it was higher; market analysts broadly forecast EUA prices in the €80 to €90 range for 2026 averages and well above €100 per tonne later in the decade. The market price is the single largest variable that decides how expensive EU ETS turns out to be for any given ship.
The phase-in — why 2026 is the year it bites
When the EU brought shipping into the system in 2024, regulators chose a three-year phase-in to give carriers time to adjust. The schedule is easy to memorize and easy to misread, so we'll lay it out carefully.
- 2024 emissions — 40 percent of reported emissions must be covered by allowances. Surrender deadline: 30 September 2025.
- 2025 emissions — 70 percent. Surrender deadline: 30 September 2026.
- 2026 emissions and onward — 100 percent. Surrender deadline: 30 September 2027.
So in calendar-year terms, the bill on a ship's books rises in two big steps: about 75 percent more allowances needed for 2025 emissions than 2024, and another 43 percent more for 2026 than 2025. The combined effect from 2024 to 2026 is a 2.5× increase in coverage, on top of whatever the allowance price itself does in the meantime.
The second 2026 change gets less press and matters as much. From 1 January, two more greenhouse gases sit inside the ETS scope: methane (CH₄) and nitrous oxide (N₂O). Until last year only CO₂ counted. Methane has a 100-year global warming potential roughly 28 times higher than CO₂; nitrous oxide is well above 270 times. Both are converted to CO₂-equivalent for ETS accounting. The change matters most for LNG-fuelled ships, where a small share of fuel routinely escapes the engine unburned (“methane slip,” typically 0.2 to 3 percent on modern dual-fuel engines) and now has to be paid for. An LNG container ship that was attractive on a CO₂-only basis in 2025 can look meaningfully worse on 2026 numbers.
What counts as an EU voyage
The scope is geographic and has three layers everyone has to memorize:
- EU-to-EU voyages — 100% of voyage emissions are inside the ETS. A ship moving from Hamburg to Valencia owes allowances on every tonne of CO₂e it emitted between the two ports.
- EU-to-non-EU or non-EU-to-EU voyages — 50% of voyage emissions count. A box ship sailing from Busan to Rotterdam owes allowances on half of its total voyage emissions. The EU has no jurisdiction over a Korean port, and a 100% rule would have been a legal stretch, so the legislators split the difference.
- At berth in an EU port — 100%. Auxiliary engines running while loading and discharging count fully.
Voyages that touch no EU/EEA port at all — Busan to Los Angeles, Singapore to Houston — owe nothing. The system follows the EU border, not the ship's flag. A Liberian-flagged vessel calling at Antwerp is in. A Maltese-flagged vessel calling only in Asia is out.
This is also where the system designers left a door open that carriers have started to walk through, which we'll come back to in a minute.
What it actually costs — one Asia–Europe voyage
The clearest way to feel the number on the invoice is to walk through a single voyage. Take a 10,000 TEU container ship leaving Busan for Rotterdam, the bread-and-butter Asia–North Europe trade.
A ship this size burns roughly 100 tonnes of very low sulphur fuel oil (VLSFO) per day at service speed. Via the Cape of Good Hope, which is the routing most carriers have used since the Red Sea security crisis began in late 2023, the voyage takes about four weeks at typical container service speed; pre-crisis Suez routing was roughly a week shorter. At four weeks of sailing, total fuel use is around 2,800 tonnes. Each tonne of VLSFO produces about 3.114 tonnes of CO₂, the IMO's standard emission factor. Total voyage emissions come out near 8,700 tonnes of CO₂.
The voyage is non-EU to EU, so 50 percent of those emissions are in the ETS scope: about 4,350 tonnes. At the May 2026 allowance price of roughly €74 per tonne, the compliance bill is around €322,000. At €77, closer to €335,000. Add the in-port emissions at berth (counted at 100 percent), and the total comes out in the €350,000 to €400,000 range for one one-way voyage on this lane.
Across the global container fleet, industry estimates put the total 2025 EU ETS cost at roughly $1.4 billion. With 100 percent coverage in 2026, that figure is projected to roughly double to around $2.7 billion. The same arithmetic applies to other EU-touching lanes with different magnitudes — Asia-to-Mediterranean voyages generate lower per-voyage bills but face the same 50 percent rule, while EU-to-EU shorthauls pay on every tonne.
Who actually pays the bill — and who is making money on it
Legally, the compliance obligation sits with the shipping company — the entity registered as the ship's operator in the EU's MRV (Monitoring, Reporting, Verification) system. The shipping company opens an account in the Union Registry, buys and holds the EUAs, and surrenders them on schedule. If allowances are short, the shipping company gets fined.
Commercially, though, none of the major liners is absorbing this cost. From January 2024, every major container carrier — Maersk, MSC, CMA CGM, Hapag-Lloyd, ONE, and the rest — has published an Emissions Surcharge that gets added to base ocean freight quotes. The names vary (EMS, ESS, EU ETS Surcharge, energy transition surcharge), but the mechanic is the same as the long-standing Bunker Recovery Charge: a quarterly recalculation tied to the published EUA price, applied per container.
For Q1 2026, Maersk's Asia-to-North-Europe surcharge sat at roughly €59 per TEU (about €118 per FEU). MSC, CMA CGM, and others published comparable figures, with substantial increases — in many lanes 40 to 50 percent higher than the equivalent 2025 rates.
Whether those surcharges actually match what carriers spend on EUAs is a different question, and one that has produced the most useful piece of public analysis on this whole topic. In 2024, Transport & Environment published a study modelling 565 individual voyages by 20 ships from each of Maersk, MSC, CMA CGM, and Hapag-Lloyd. The headline finding: in roughly 90 percent of the journeys analysed, the published surcharge exceeded the carrier's estimated actual ETS cost. The average per-voyage windfall was estimated at around €60,000 for Maersk, €25,000 for MSC, €23,000 for Hapag-Lloyd, and €14,000 for CMA CGM. On a single China-to-Germany voyage, the gap reached approximately €325,000 of surcharge revenue above estimated cost. Maersk pushed back on the methodology; T&E stood by the numbers.
Whether you accept T&E's figures down to the euro or not, the broader point is structural: the surcharge market is not transparent, the inputs each carrier uses are not public, and the prices are reviewed only quarterly. That gives shippers with audit capability — large industrial buyers, 3PLs, freight forwarders — a real opportunity, and an emerging practice, to verify surcharges invoice-by-invoice against the carriers' underlying voyage emissions and the prevailing EUA price.
FuelEU Maritime — the other EU regulation on the same bill
It's worth pausing here because EU ETS is one of two parallel EU regulations driving 2026 cost increases on European trades, and the two get confused. The other is FuelEU Maritime. The mechanic is different and the two work together rather than overlap.
EU ETS taxes emissions. Every tonne of CO₂e in scope has a price. Buy enough allowances and you're compliant, however much you actually emitted. FuelEU Maritime instead sets a maximum on the greenhouse-gas intensity of the fuel a ship burns — grams of CO₂e per megajoule of energy. That intensity limit declines on a fixed schedule out to 2050. If a ship's fuel mix is too carbon-heavy, FuelEU adds a separate penalty per missing unit of energy. Allowances cannot be substituted; the regulation forces the fleet toward lower-carbon fuels regardless of carbon price.
Shippers see this on the bill as a separate line, often grouped with the EU ETS surcharge but calculated differently. The first FuelEU reporting period ended on 31 December 2025, with the verified results feeding into 2026 compliance and surcharge updates. Maersk's public emissions-surcharge advisories for 2026 explicitly cite both EU ETS and FuelEU as the two drivers behind the increase.
The arbitrage — calling at a UK port first
Back to that door the legislators left open. The 50 percent rule on EU-to-non-EU voyages, combined with the fact that the United Kingdom runs its own separate carbon market (UK ETS) outside the EU system, creates a routing opportunity. From the EU's point of view, a ship coming from Asia that discharges first at a UK port has “ended” its non-EU voyage there. The subsequent UK-to-EU hop is a shorter leg, and the EU ETS cost is calculated only on that shorter EU-bound portion.
Several Asia–Europe services have been redesigned around exactly this geometry — calling at Felixstowe, Southampton, or London Gateway before the EU port rotation. CMA CGM and MSC's NEWMO service, MSC's Swan service, and the CMA CGM–COSCO EPIC service are widely cited examples. The UK ETS bill still has to be paid on the British leg, but UK allowance prices have generally traded somewhat below EU EUAs — the gap reached over 30 percent through mid-2025 before narrowing somewhat after the May 2025 UK-EU linking announcement — so the math has tilted in favour of the routing.
The UK is closing part of this loophole on its own terms. From 1 July 2026, the UK ETS extends to domestic UK maritime emissions, with a shortened first compliance period running July through December 2026. EU and UK governments have separately signalled their intention to link the two carbon markets, though no firm timeline exists yet. Until the systems are linked or the UK price climbs to meet the EU's, cross-border arbitrage between the two will persist.
What 2026 changes specifically
Three things about this year are different from anything shippers have seen before, and they matter together:
- Full 100 percent surrender on 2026 emissions. No more discount for being in the phase-in window. Every tonne reported under MRV in 2026 has to be matched 1:1 with an EUA by 30 September 2027.
- Methane and nitrous oxide inside the scope. LNG-fuelled vessels in particular face a real change: methane slip that previously didn't appear on the ETS books now does, at the global-warming-potential-adjusted rate. The accounting moves from CO₂ only to CO₂-equivalent.
- UK ETS goes live for maritime in July. Domestic UK voyages and round-trips to British ports will start incurring UK allowance costs. Carriers and shippers with significant UK exposure need to track two markets, not one.
Layer in the European Commission's announced review of further ETS expansions in July 2026, FuelEU Maritime's compliance ratchet kicking in further this year, and a possible IMO Net-Zero Framework adoption at the reconvened October 2026 session (delayed by one year from the October 2025 vote), and you have a year where the regulatory cost of moving emissions through European waters is rising on three or four axes simultaneously.
The 30-Second Version
- The EU Emissions Trading System is a cap-and-trade carbon market. Shipping has been inside it since January 2024.
- 2024 emissions were covered at 40 percent, 2025 at 70 percent, 2026 at 100 percent. The phase-in is over. 2026 emissions surrender by 30 September 2027.
- Geographic scope: EU-to-EU 100 percent, EU-to-non-EU 50 percent, at berth in an EU port 100 percent. Outside that, no obligation.
- EUA price in May 2026 is around €74 per tonne CO₂e. A Busan–Rotterdam voyage on a 10,000 TEU ship under current Cape routing costs roughly €350,000–€400,000 in EU ETS compliance.
- Carriers pass the cost on through quarterly Emissions Surcharges. Maersk's Q1 2026 Asia–North-Europe rate is about €59 per TEU. Total container-industry cost rises from roughly $1.4B in 2025 to a projected $2.7B in 2026.
- Methane and N₂O are now in scope from 2026 — a meaningful change for LNG-fuelled ships.
- UK ETS extends to maritime from July 2026, with the UK allowance price still trading below the EU EUA. Routing arbitrage via UK ports continues until the systems link.
Closing
EU ETS is the first carbon pricing system that actually reaches across the open ocean. It has flaws — the 50 percent rule invites arbitrage, the surcharge market is not transparent enough for many shippers' liking, and the prices it generates are volatile by design. But it is also, at the moment, the only operational carbon market for international shipping. The IMO's Net-Zero Framework was supposed to add a parallel global system this year; the October 2025 extraordinary session voted to adjourn the decision by twelve months. Until that reconvenes in October 2026 and either adopts the framework or doesn't, the EU rules are the only carbon cost most of the global fleet actually has to pay.
For most operators trading into Europe, the right answer in 2026 is not to argue about whether the system is fair. It is to make sure the surcharge being charged matches the actual ETS cost being incurred, route around the parts of the rule that can legitimately be routed around, and start factoring carbon pricing into newbuild and fuel decisions the way bunker prices have always been factored in. The carbon line is going to stay on the freight quote. Treating it as a permanent cost is what separates a 2024 operator from a 2026 one.
For related coverage on how this fits with the wider regulatory picture, see our analysis of the IMO Net-Zero Framework outcome at MEPC 84 and the political coalitions reshaping shipping climate rules. For the routing side of the same equation, the Northern Sea Route economics in 2026 explains how carbon pricing tilts Asia–Europe routing decisions, and the ice class explainer covers the vessel-side requirements for the routes the regulation rewards.