UK Emissions Trading Scheme (UK ETS) — Maritime Extension
Status: Upcoming — Maritime extension enters into force 1 July 2026. Early preparation is critical to meet the 42-day EMP submission deadline.
What Is It?
The UK Emissions Trading Scheme extends to domestic maritime transport from 1 July 2026. As a cap-and-trade carbon market separate from the EU ETS, the UK ETS requires operators of qualifying ships to monitor, report, and surrender allowances for greenhouse gas emissions — including CO2, CH4 (methane), and N2O (nitrous oxide) — on voyages between UK ports and during in-port activities at UK ports.
The scheme covers 100% of emissions from voyages between two UK ports and in-port activities, plus 50% of emissions from Northern Ireland–Great Britain voyages. The regulated entity is the registered ship owner, unless responsibility is formally delegated to the ISM company by written agreement. Unlike the EU ETS, the UK ETS excludes Crown Dependencies and British Overseas Territories from its geographic scope.
A key compliance requirement is the Emissions Monitoring Plan (EMP) — a company-level document that must be submitted to the relevant regulator within 42 days of first qualifying activity. The first reporting period runs from 1 July to 31 December 2026 (6 months only), with subsequent years following a full calendar year. Verified emissions reports are due by 31 March following each reporting period, with a one-off combined allowance surrender deadline of 30 April 2028 covering both the 2026 and 2027 periods.
Regulators are split by jurisdiction: the Environment Agency (England and non-UK entities), Natural Resources Wales (NRW), the Scottish Environment Protection Agency (SEPA), and the Department of Agriculture, Environment and Rural Affairs (DAERA) for Northern Ireland. Early onboarding is available through the Environment Agency's METS platform.
Who It Affects
The UK ETS maritime extension applies to operators of ships carrying cargo or passengers between UK ports, including domestic voyages and in-port activities. The regulated entity is the registered ship owner, unless responsibility is formally delegated to the ISM company via written agreement. Permanently exempt vessel categories include armed services, law enforcement, fishing vessels, publicly funded research ships, coastguard and search-and-rescue vessels, medical emergency ships, non-mechanically propelled vessels, Scottish ferries, and primitive wooden ships. Offshore vessels receive a temporary exemption through 31 December 2026 only. The scheme applies regardless of flag state for vessels operating between UK ports.
Key Dates
UK ETS maritime extension enters into force — monitoring of CO2, CH4, and N2O begins for qualifying domestic voyages
Deadline for Emissions Monitoring Plan (EMP) submission — 42 days after first qualifying activity
End of first reporting period (6 months only); subsequent periods follow calendar year
Deadline for verified emissions report for 2026 reporting period
End of second reporting period (full calendar year)
One-off combined allowance surrender deadline covering both 2026 and 2027 emissions
Requirements
- Develop and submit a company-level Emissions Monitoring Plan (EMP) to the relevant regulator within 42 days of first qualifying activity
- Monitor CO2, CH4 (methane), and N2O (nitrous oxide) emissions from all qualifying domestic voyages between UK ports
- Apply 100% coverage for UK port-to-port voyages and in-port activities; 50% for Northern Ireland–Great Britain voyages
- Submit verified emissions reports by 31 March following each reporting period via the Environment Agency METS platform
- Procure and surrender UK Allowances (UKAs) covering all verified emissions by the applicable surrender deadline
- Register with the correct regulator based on jurisdiction: Environment Agency (England), NRW (Wales), SEPA (Scotland), or DAERA (Northern Ireland)
- Maintain records of fuel consumption, voyage data, and emissions calculations for audit and verification purposes
- Ensure the registered ship owner or formally delegated ISM company fulfils compliance obligations as the regulated entity
Penalties & Non-Compliance
Non-compliance with the UK ETS maritime extension results in civil penalties enforced by the relevant jurisdictional regulator. Operators failing to submit an Emissions Monitoring Plan within the 42-day deadline, failing to monitor and report emissions accurately, or failing to surrender sufficient UK Allowances by the deadline face enforcement action. Penalties include financial sanctions, mandatory compliance orders, and potential publication of non-compliant operator names — creating significant reputational risk in an industry where charterers and cargo owners increasingly scrutinize environmental compliance. The UK government retains the power to increase penalty severity as the scheme matures, and persistent non-compliance may lead to escalated enforcement measures.
How CyberSmart Helps
These modules directly support your UK ETS compliance workflow.
Prepare for UK ETS before July 2026
See how CyberSmart automates EMP development, emissions monitoring, verified reporting, and allowance surrender for your UK domestic fleet.