The ECO4 scheme provides free energy-efficiency upgrades to low-income and vulnerable households, targeting a reduction in heating costs and carbon emissions. It is legally mandated by the UK government and administered by energy suppliers, with the latest phase running until March 2026 (GOV.UK, 2026).
Eligibility is determined by a combination of property type, existing heating system, and household income or benefits. The scheme covers measures such as insulation, heat pumps, solar panels, and boiler replacements, but only if a property has an Energy Performance Certificate (EPC) rating of D or below. It does not apply to households with a modern gas boiler or those who have already received ECO funding for the same measure.
Who qualifies for ECO4 funding
You qualify if you receive one of several means-tested benefits, including Pension Credit, Universal Credit, or Income Support. The scheme also extends to households with a total annual income below £31,000, even if no benefits are claimed, provided the property is poorly insulated (Ofgem, 2026). Landlords can apply for funding if their tenants meet the criteria, but the property must be rented out and have an EPC rating of E, F, or G.
What the scheme covers and how it is delivered
ECO4 funds a range of improvements, including loft insulation, cavity wall insulation, air source heat pumps, and solar photovoltaic panels. The typical value of measures per household ranges from £2,000 to £15,000, depending on the scope of work (Energy Saving Trust, 2026). Installation is carried out by TrustMark-registered installers, and the cost is paid directly by the energy supplier, you do not receive cash. The scheme prioritises whole-house improvements, meaning multiple measures are often installed together to maximise energy savings.
How to apply and common pitfalls
You cannot apply directly to the government. Instead, contact your energy supplier or a local authorised installer. You will need to provide proof of benefits or income, and an in-home survey will assess your property (TrustMark, 2026). Common reasons for rejection include having a recent gas boiler installed, an EPC rating above D, or not meeting the income threshold. Expect a 6- to 12-week wait from application to installation, though times vary by supplier. If you are a tenant, written permission from your landlord is required before work begins.
A worked example
A typical 1930s semi-detached house in Manchester with an EPC rating of E would see upfront costs for a full package of cavity wall insulation, loft insulation, an air source heat pump, and solar panels reduced to around £2,500 after the £7,500 BUS grant and ECO4 supplier funding. The Energy Saving Trust estimates this combination saves roughly £1,100 per year on heating and electricity bills. Glazing is standard-rated for VAT at 20%. The zero rate for energy-saving materials covers insulation, heat pumps and solar panels; HMRC names secondary and double glazing as excluded (VAT Notice 708/6). Over a 25-year system lifetime, total savings reach approximately £27,500, factoring in the heat pump’s 15-year lifespan and solar panels’ 25-year output. This example assumes the household qualifies via Pension Credit and the property has no existing gas central heating, a key ECO4 requirement.
| Item | Figure |
|---|---|
| Upfront cost after grants | £2,500 |
| Yearly savings | £1,100 |
| Payback period | 2.3 years |
| 25-year lifetime savings | £27,500 |
What homeowners often get wrong
The most common mistake is assuming ECO4 covers any home with a low EPC rating, regardless of heating system type. Here are the three biggest misunderstandings that cost homeowners time and money.
- Believing a modern gas boiler blocks all funding Households with a gas boiler installed after 2015 are typically ineligible for ECO4 heating upgrades, but they can still get insulation and solar panels. Missing this distinction means losing up to £10,000 in free cavity wall and loft insulation.
- Thinking the scheme pays cash directly ECO4 does not give you a cheque, it pays the installer directly for approved work. Homeowners who expect a cash lump sum often waste months chasing suppliers, only to discover the funding is only for installed measures.
- Assuming landlord properties are automatically excluded Many buy-to-let landlords miss out because they think ECO4 only applies to owner-occupiers. In reality, tenants on qualifying benefits can trigger funding for EPC E, F, or G rentals, but the landlord must provide written permission before the survey.
Quick reference
- ECO4 runs until March 2026 and is legally mandated by the UK government under the Energy Company Obligation scheme.
- You qualify if your household receives Pension Credit, Universal Credit, or Income Support, or if your total annual income is below £31,000.
- The property must have an EPC rating of D or below before any upgrades are installed.
- Typical measures funded include cavity wall insulation, loft insulation, air source heat pumps, and solar panels worth up to £15,000.
- Landlords can apply only if the tenant meets the benefit or income criteria and the property has an EPC rating of E, F, or G.
Frequently Asked Questions
Homeowners on means-tested benefits or with income under £31,000 can get free upgrades. The scheme pays for insulation, heat pumps or solar panels if your EPC rating is D or below.
You qualify if you receive Pension Credit, Universal Credit or Income Support. Ofgem confirms these benefits make you eligible for fully funded measures.
Installation typically takes 1 to 5 days depending on the measure. A full survey and approval process usually adds 4 to 8 weeks before work begins.
