The two ways in: benefits or ECO4 Flex
ECO4 eligibility starts with the household. Either someone receives a benefit on the official list (the benefits route), or the household is referred by its local council under ECO4 Flex, sometimes called LA Flex. Ofgem also says councils and the devolved administrations can refer low-income or vulnerable households, and that suppliers can refer households with persistent fuel debt or who have been disconnected on a prepayment meter.
The second test is the property: how energy efficient it is now, shown by its Energy Performance Certificate (EPC), and who owns it. Both tests have to be passed, and even then a supplier still decides what, if anything, to fund.
ECO4 qualifying benefits
GOV.UK and Ofgem list the same eight benefits. If anyone living in the home receives one, the household may be eligible through the benefits route, as long as the home also meets the EPC rule.
| Benefit (as listed by GOV.UK and Ofgem) | Who it is usually paid to |
|---|---|
| Universal Credit | Working-age households on a low income |
| Pension Guarantee Credit | People over State Pension age on a low income |
| Pension Savings Credit | Some people over State Pension age with modest savings or income |
| Income Support | Some working-age people on a low income |
| Income-based Jobseeker's Allowance (JSA) | Jobseekers on a low income |
| Income-related Employment and Support Allowance (ESA) | People whose illness or disability limits work |
| Child Benefit | Parents and carers of children |
| Housing Benefit | People on a low income who pay rent |
Sources: GOV.UK, Energy Company Obligation; Ofgem, homeowners and tenants. Checked 19 October 2026.
The "who it is usually paid to" column is our plain-English summary to help you recognise the benefit, not an eligibility rule. The benefit itself is what counts. If Child Benefit is your only qualifying benefit, ask the supplier or council to confirm how it applies to your household.
ECO4 Flex: if no one gets a benefit
ECO4 Flex is, in Ofgem's words, a household referral mechanism within ECO4 that lets councils widen the eligibility criteria. A council that takes part must publish a Statement of Intent, and it is responsible for deciding which households are eligible and declaring them. Ofgem's consumer guidance gives the main reasons a household is referred:
| ECO4 Flex reason (Ofgem) | What it means in practice |
|---|---|
| Combined gross annual household income under £31,000 | Everyone's income before tax, added together |
| A severe or long-term health condition made worse by a cold home | For example a cardiovascular condition, a respiratory disease, limited mobility or immunosuppression |
| Referral by a council or devolved administration | Low-income or vulnerable households the council identifies, under its own criteria |
| Referral by a supplier | Households with persistent fuel debt or prepayment-meter disconnections |
Sources: Ofgem, homeowners and tenants; Ofgem, local authorities. Checked 19 October 2026.
Councils can add criteria of their own, so the document that decides is your council's ECO4 Flex Statement of Intent. Ofgem says some councils allow self-referral. If your council does not take part, the Flex route is closed to you, but the benefits route may still be open. The four Flex routes, including the seven proxies and NHS referrals, are set out on our ECO4 LA Flex page.
The EPC rule
| Your situation | EPC rating needed (GOV.UK) | Also needed |
|---|---|---|
| Owner-occupier | D, E, F or G | A qualifying benefit, or an ECO4 Flex referral from your council |
| Private tenant | E, F or G | The owner's permission for the work |
| Social housing tenant | E, F or G | Help is with insulation or a first-time heating system |
Sources: GOV.UK, Energy Company Obligation. Checked 19 October 2026.
Find your rating on the GOV.UK EPC register by entering your postcode. If there is no certificate, the home may never have been assessed; a retrofit assessment would be part of any ECO4 job anyway. If the rating is borderline, say so in the checker and we will explain your options by email.
Tenants and landlords
Private tenants can be eligible, but GOV.UK is clear that you must have the owner's permission for the work, and the home must be rated E, F or G. If you are a landlord, ECO4 help is assessed on the household living in the property, so your tenant would need to qualify; you give the permission. Social housing tenants in homes rated E, F or G might get help with insulation or with installing a heating system for the first time; your landlord or housing association is usually involved.
England, Scotland and Wales
ECO is a government energy efficiency scheme in Great Britain, so the same eligibility rules apply in England, Scotland and Wales. Ofgem points people in Scotland to Home Energy Scotland for advice, and people in Wales to Nest. ECO runs in Great Britain (England, Scotland and Wales).
Worked examples: applying the rules
These examples apply the published GOV.UK and Ofgem rules to common situations. They show how the tests combine; they are not decisions, which only a supplier or council can make.
| Household | Benefit or Flex? | EPC and tenure | How the rules read |
|---|---|---|---|
| Couple in their seventies, own a semi, one gets Pension Guarantee Credit | Qualifying benefit | Owned, rated E | Passes both tests: the benefits route may be open |
| Single parent renting privately, gets Universal Credit | Qualifying benefit | Rented, rated D | Fails the EPC test: rented homes need E, F or G |
| Working couple, no benefits, joint income £28,000, own a terrace | Possible Flex reason (income under £31,000) | Owned, rated F | Depends on the council taking part in ECO4 Flex and its criteria |
| Homeowner with COPD, no benefits, income above £31,000 | Possible Flex reason (health) | Owned, rated E | Depends on the council's Statement of Intent |
| Family on Child Benefit only, own a home rated C | Qualifying benefit listed | Owned, rated C | Fails the EPC test: owned homes need D, E, F or G |
The pattern is always the same: the household test (benefit or Flex) and the property test (EPC rating for your tenure) must both be met, and the supplier then decides what to fund. If one test fails, ECO4 is unlikely, and our reply will say so plainly rather than keep you waiting.
Common eligibility mistakes
- Counting the State Pension as a benefit. It is not on the list. Pension Credit (Guarantee or Savings Credit) is.
- Assuming the bill payer must qualify. GOV.UK's wording is about the household: the benefit needs to be received by someone living in the home.
- Using an old EPC without checking it. If work has been done since, the rating may have changed. Check the register date.
- Thinking "eligible" means "approved". Ofgem says eligibility does not guarantee installation.
- Waiting for a council letter. Ofgem says some councils allow self-referral for ECO4 Flex, so you can ask.
After you check
If you look eligible, the next step is to contact an obligated energy supplier or your council. Our guide on how to apply for ECO4 explains each route, what to have ready and what to check before you sign anything. If you are applying for an older relative, see ECO4 for pensioners. And because ECO is not a grant scheme, read is ECO4 really free before you agree to any work.
What happens next if you send the checker: we reply by email with the route that looks most likely and who to contact. There is no obligation and no fee, and we do not pass your details to an installer.
ECO4 eligibility questions
Who is eligible for ECO4?
GOV.UK says households in private housing may be eligible if someone gets one of eight benefits, including Universal Credit, Pension Credit and Child Benefit. Owner-occupied homes need an EPC rating of D to G and privately rented homes E to G. Households without a benefit may be referred through ECO4 Flex by a participating council.
What is the ECO4 income threshold?
Ofgem's consumer page lists a combined gross annual household income under £31,000 as one reason a council may refer a household through ECO4 Flex. Councils decide and can set their own criteria.
Which health conditions count for ECO4 Flex?
Ofgem lists a severe or long-term health condition made worse by living in a cold home, such as a cardiovascular condition, a respiratory disease, limited mobility or immunosuppression.
Can I get ECO4 if I rent privately?
Possibly. GOV.UK says a privately rented home must have an EPC rating of E, F or G and you need the owner's permission for the work.
Does being eligible mean I will get work done?
No. Ofgem says eligibility does not guarantee installation. Suppliers decide which measures to fund and how much.