In EU ETS maritime compliance, the real first step is not buying allowances — it is monitoring, reporting and verifying emissions data. This is what is commonly referred to as MRV.
MRV stands for Monitoring, Reporting and Verification. For shipping companies, an MRV report is not simply a declared total emissions figure; it is a verified data foundation covering each ship's voyages, fuel consumption and greenhouse gas emissions during the reporting period.
Put simply: MRV answers where the emissions data comes from and whether it can be trusted; the EU ETS answers how many EUAs must be surrendered on the basis of that data. The chain runs from day-to-day monitoring (voyage, fuel and emissions data) to reporting and verification, then company-level aggregation, and finally EUA demand calculation and surrender.
01 What is EU MRV?
EU MRV is the EU's monitoring, reporting and verification regime for maritime emissions. Its principal legal basis, Regulation (EU) 2015/757, was adopted and entered into force back in 2015, with the first formal reporting period beginning on 1 January 2018. The regime was originally designed to build a data foundation on ship emissions to support later emissions-reduction policy.
As shipping was brought into the EU ETS, MRV data became an essential basis for EU ETS compliance. EMSA notes that the maritime element of the EU ETS builds on the MRV Maritime Regulation and on data reported through THETIS-MRV.
02 What does an MRV report actually cover?
An MRV report is not simply an annual emissions figure. In practice, it covers a ship's emissions-related activity across the reporting period, including:
- Basic ship particulars
- Voyages and time spent at berth
- Fuel consumption and greenhouse gas emissions
- Emission calculation methods and data sources
- Confirmation of consistency with the monitoring plan
The purpose of this information is to turn a full year of emissions activity into data that can be verified, traced and used for subsequent compliance decisions. Report quality directly affects downstream compliance work: if fuel consumption, voyage boundaries, port stays or periods of responsibility are unclear, company-level aggregation, EUA demand calculation and cost allocation will all be affected.
03 Why is the MRV report the first step to compliance?
EU ETS compliance is built on verified emissions data — how many EUAs a company must surrender depends first on its verified applicable emissions for the previous year. That figure is not produced shortly before 30 September; it comes from routine monitoring, annual reporting, verification by an accredited verifier and company-level aggregation.
In other words, the more robust the MRV report, the clearer the subsequent EUA demand calculation. The more MRV data lags, the more reactive procurement, surrender and internal settlement become.
For example, if a company cannot confirm in good time a ship's voyage boundaries, fuel consumption or period of management responsibility for the previous year, this affects not only that ship's annual emissions report but potentially the formation of company-level compliance emissions data — and ultimately EUA purchase volumes and compliance arrangements.
The MRV report is not an accessory document ahead of EU ETS compliance; it is the source data for allowance calculation and surrender.
04 How do ship-level and company-level reports relate?
Under EU ETS maritime compliance, companies need to understand two levels of reporting. The ship-level annual emissions report answers how much a given ship emitted in the previous reporting period. The company-level emissions report, or aggregated emissions data, answers how much EU ETS compliance emissions the company must account for over the same period.
EMSA explains that, from 2025, companies must submit an annual emissions report for the previous reporting period for each ship under their responsibility by 31 March each year. For ships within ETS scope, a company-level emissions report must also be submitted, aggregating the data used for ETS purposes at company level and verified to the satisfaction of the verifier.
Ship-level MRV data comes first; company-level ETS compliance data follows. The former is the foundation; the latter directly determines EUA surrender.
05 Which compliance matters does the MRV report affect?
- EUA demand calculation: Companies calculate the final EUA volume to surrender from verified applicable emissions combined with the surrender ratio for the year — 70% for 2025 emissions, 100% for 2026 and beyond.
- Procurement rhythm: If MRV data cannot be confirmed in good time, it is difficult to judge how many EUAs to buy or to plan purchases around market prices and internal approval cycles.
- Contractual settlement and cost allocation: Allocating EU ETS costs between owners, managers, charterers and operators generally relies on clear, verifiable emissions data. Ambiguous MRV data invites disputes at settlement.
- Data management in later years: From 1 January 2026, the maritime element of the EU ETS covers CH₄ and N₂O on a CO₂e basis alongside CO₂. Companies will need to pay closer attention to fuel types, non-CO₂ greenhouse gases and final CO₂e outcomes in their monitoring.
06 What should companies focus on?
For shipping companies already in the EU ETS compliance cycle, MRV work should be part of routine compliance management rather than a scramble before the annual report. Key points to check:
- Whether the monitoring plan still matches the current ships, trades and fuel use;
- Whether raw data on fuel consumption, voyages and port stays is complete and traceable;
- Whether periods of responsibility are clearly delineated in cases of sale and purchase, change of manager or ISM change;
- Whether verifiers have been engaged early and enough time is allowed for report corrections;
- Whether ship-level annual reports and company-level aggregated data can be completed on schedule;
- Whether 2026 emissions account for the inclusion of CH₄ and N₂O;
- Whether the MRV data can support subsequent EUA procurement, surrender and cost allocation.
Tecway's view
The core of EU ETS compliance is not only how many EUAs are ultimately surrendered, but whether a company can maintain a stable, accurate and verifiable data management process. As the first step of the annual compliance cycle, the MRV report feeds directly into company-level aggregation, EUA demand calculation, allowance procurement and the final surrender before 30 September. The sooner MRV data management is put on a solid footing, the more control a company has over its EU ETS compliance.
If you would like to discuss annual EU ETS compliance planning, EUA procurement or allowance demand modelling, please contact Tecway Maritime.
References
- European Maritime Safety Agency, ETS Extension to maritime
- European Maritime Safety Agency, MRV Regulation
- European Commission, FAQ – Maritime transport in EU Emissions Trading System
- Regulation (EU) 2015/757 of the European Parliament and of the Council