ECO4
The Energy Company Obligation (ECO4) requires larger energy suppliers to fund energy efficiency improvements in low-income and vulnerable households.
Who may qualify
Eligibility commonly via qualifying benefits, low income, or local authority flexible eligibility (LA Flex). Property usually EPC D-G.
Common requirements
- EPC rating typically D-G
- Receiving qualifying benefits, on a low income, or LA Flex referred
- Property in England, Scotland or Wales
What improvements may be covered
- Loft insulation
- Cavity wall insulation
- Solid wall insulation
- Boiler upgrade
- Heating controls
How to check eligibility
Use our free eligibility checker for a quick guide based on your home, household and goals. Then verify with the official source or an approved installer.
Start free checkOfficial source
Last reviewed: 2026-05-06
Frequently asked questions
Do I need to be on benefits for ECO4?
Not always. Local authority flexible eligibility (LA Flex) lets councils refer households who are not on qualifying benefits but meet local criteria.
Is ECO4 available across the UK?
ECO4 operates in England, Scotland and Wales. Northern Ireland has separate schemes such as Affordable Warmth.
Can landlords use ECO4?
Yes, in some circumstances, particularly where tenants meet eligibility criteria. Landlord contributions may apply.