Energy Company Obligation (ECO2) Final Determination Report

Publication date
11th April 2019
Information types
Policy areas

The Energy Company Obligation (ECO2), which started in 2015, is a Government scheme for Great Britain that places legal obligations on larger energy companies to deliver energy efficiency measures to domestic premises. It was preceded by ECO1 which ran from 1 January 2013 to 31 March 2015.

There were three distinct obligations under ECO2 which energy companies were required to meet. The obligations were the Carbon Emissions Reduction Obligation (CERO), the Carbon Saving Community Obligation (CSCO) and the Home Heating Cost Reduction Obligation (HHCRO). CSCO also had a sub-obligation focused on rural areas (the CSCO rural sub-obligation). Additionally, suppliers were required to deliver a minimum amount of savings through the delivery of solid wall insulation measures, known as the Provisional Solid Wall Minimum Requirement (PSWMR) sub-obligation. Solid wall insulation measures delivered under any of the three main obligations were eligible to count against a supplier’s PSWMR obligation.

An extension to the obligation period for ECO2 was established under The Electricity and Gas (Energy Company Obligation) (Amendment) Order 2017. The extension to the obligation period ran from 1 April 2017 to 30 September 2018 and was referred to as ECO2t.  ECO2t had two distinct obligations: CERO and HHCRO and two sub-obligations: under CERO, the CERO rural sub-obligation focused on rural areas, and under HHCRO, the Home Heating Minimum Requirement (HHMR) which required a supplier to deliver a minimum amount of its HHCRO target through measures other than the replacement of a qualifying boiler fuelled by mains gas.

The CSCO and CSCO rural sub-obligation were not extended and ended on 31 March 2017. A final report was published detailing energy companies' achievement against their CSCO and CSCO rural sub-obligations on 28 September 2017.

Below we have published the final report for ECO2 which details our final determinations on energy companies’ achievement against their obligations. This report is published alongside being provided to the Secretary of State as part of our duties as the administrator of the scheme.

Suppliers continue to be obligated to deliver energy efficiency measures under ECO3 and we will continue to provide regular monthly public reports.