New EU port emissions rules in 2026: what port operators need to know

For years, maritime decarbonization targets felt distant — ambitious commitments with long horizons and vague enforcement mechanisms. That changed in 2024 and 2025, when two major EU regulatory frameworks came into force simultaneously, putting real financial stakes behind emissions performance for the first time.

For port operators and vessel operators calling EU ports, the question is no longer whether regulations will affect operations. It's how, how much, and what can be done about it.

The two frameworks that matter

Together, these two frameworks create a compliance cost that scales directly with emissions — and therefore directly with operational inefficiency. A vessel burning unnecessary fuel during anchorage waiting isn't just wasting money on bunkers. It's generating ETS liability and FuelEU exposure at the same time.

The ETS phase-in timeline

What counts as "reportable emissions"

A common misconception is that ETS only covers emissions during the voyage itself. In practice, the scope is broader. For voyages between EU ports, 100% of emissions are in scope. For voyages between an EU port and a non-EU port, 50% of emissions are covered.

Critically, emissions at berth — including during cargo operations and while vessels are maneuvering in port — are included in the calculation. This means port call efficiency has a direct bearing on ETS compliance costs.

Where arrival optimization fits in

Reducing anchorage time is one of the most direct operational levers available to ports and vessel operators working within this regulatory environment. The logic is straightforward: less idle time at anchor means less fuel burned, which means lower ETS costs and better FuelEU GHG intensity scores.

Just-in-Time (JIT) arrival — where vessels slow-steam on approach rather than arriving early and anchoring — is increasingly recognized by regulators and industry bodies as a primary efficiency tool. The IMO's JIT guidelines and the EU's own guidance on port call optimization both point in this direction.

The challenge is that JIT only works if the port can give vessels reliable, real-time berth availability information far enough in advance. Without that, a vessel slowing down risks missing its berth window and ending up anchored anyway — worse off than if it had arrived at full speed.

This is where arrival intelligence — connecting live vessel tracking data with port scheduling — creates direct compliance value. Ports that can confidently tell inbound vessels "your berth will be ready at 14:30" create the conditions for genuine slow steaming. Ports that can't make that commitment won't see masters take the risk.

What port operators should be doing now

The regulatory environment rewards ports that can demonstrate active efforts to reduce emissions from port calls — not just through infrastructure investments, but through operational improvements. Three areas stand out:

Real-time arrival coordination. Moving from email-based ETAs to live AIS-derived arrival intelligence gives port planners the information they need to optimize berth allocation dynamically — reducing both vessel idle time and berth idle time simultaneously.

JIT communication infrastructure. Ports that can proactively communicate updated berthing windows to inbound vessels — and adjust those windows as conditions change — enable meaningful slow steaming. This requires a two-way information flow that most ports don't yet have.

Emissions data tracking. Under ETS and FuelEU, vessel operators need accurate emissions data per port call. Ports that can provide verified data on time spent at berth, at anchor, and maneuvering will become preferred calling points for compliance-conscious operators.