Energy Company Obligation (ECO)

Contacts, guidance and resources

This section is primarily for those actively involved in delivering the Energy Company Obligation (ECO). This includes obligated energy suppliers, those in the ECO supply chain, and interested stakeholders.

The information in this section relates to measures installed from 1 October 2018 only, and documents relating to this period are labelled ECO3. Different rules apply to measures installed prior to 1 October 2018. Guidance resources for this period are still accessible on our website and are clearly labelled as applying to measures installed before 30 September 2018 (ECO2t, ECO2 or ECO1, respectively). 

The key documents and resources needed to successfully deliver measures under the scheme can be found on our ECO guidance page, and all recent ECO consultations and decisions located in our consultations and feedback page.

Our ECO public reports, updated on a monthly basis, show suppliers progress towards obligations, and our forums and working groups page provides the latest updates and resources from forums such as the ECO reporting working Group, ECO quarterly suppliers’ Forum, and ECO stakeholder delivery group.

If you can’t find the information you’re looking for, get in touch with us at and we’ll be happy to help.