Energy Savings Opportunity Scheme (ESOS) – 29th July 2025
MESOS Reporting System Update
The Progress Update 1 functionality has now gone live within the MESOS system. In order to submit your progress update, you must have registered an organisation account within the MESOS system.
To initiate and submit your Progress Update 1 please follow the steps below:
- Login at https://manage-energy-saving-opportunities-reporting.service.gov.uk/
- Select ‘Accounts’ section
- Select your organisation account and ‘start a new task’
- Click the green button under ‘Phase 3 Progress Update 1’ titled ‘Start’
- This starts the Progress Update 1 workflow
Once the Progress Update 1 is started you can access it as a task in your dashboard and submit this to the regulator once complete.
As communicated previously, organisations qualifying for Phase 3 of ESOS, the deadline for submitting your ESOS Progress Update 1 is the 5th December 2025.
Disaggregated Undertakings
Undertakings which have left their highest parent group/participant since it submitted an action plan, are required to submit an initial progress update on their own behalf if they have not agreed to do so with either their old group/participant or new group.
This will require the creation of an account in MESOS, and any late or non-submission of the initial progress update could be subject to enforcement action by the regulator.
