The first step to apply for the ECO4 scheme is to contact your energy supplier or a government-approved installer, as you cannot apply directly to the government, according to GOV.UK, 2026. The scheme provides up to £25,000 in energy-efficiency upgrades for low-income households.
- Contact your energy supplier or a TrustMark-registered installer to apply.
- You must receive a qualifying benefit or have income under £31,000.
- Your home needs an EPC rating of D, E, F or G to qualify.
Eligibility is the deciding factor. You must receive a qualifying benefit, such as Pension Credit or Universal Credit, or have a household income under £31,000. The scheme applies to owner-occupiers and private tenants, but not to social housing residents. If you do not meet these criteria, you cannot proceed with an application.
Check Your Eligibility First
Before applying, verify you are eligible. You must receive one of the qualifying benefits listed on GOV.UK, 2026, such as Income Support, Jobseeker’s Allowance, or Child Tax Credit with a household income below £20,000. If you are not on benefits, you may still qualify if your annual household income is under £31,000, per the same source. Your property must also have an Energy Performance Certificate (EPC) rating of D, E, F or G, as confirmed by the Department for Energy Security and Net Zero, 2026.
Contact an Approved Installer or Supplier
Once eligible, find a TrustMark-registered installer. The TrustMark, 2026 database lists approved contractors for ECO4. You can also call your energy supplier, most major suppliers like British Gas, EDF, and Octopus Energy run their own ECO4 programmes. The installer will arrange a free survey of your home. They assess your property and recommend upgrades, such as insulation, a heat pump, or solar panels, which are fully funded under the scheme, according to Energy Saving Trust, 2026.
Complete the Assessment and Installation
The installer conducts an EPC assessment, which is mandatory for every ECO4 application. This costs nothing to you and confirms your property’s energy rating. The Department for Energy Security and Net Zero, 2026 requires this to ensure upgrades are appropriate. After approval, the installer schedules the work. Typical installations take one to three days. You do not pay for the measures, as the supplier’s obligation covers all costs. Once complete, the installer registers your upgrade with the Ofgem, 2026 to finalise the process.
A worked example
A typical 1930s semi-detached home in the Midlands with an EPC rating of E would cost around £18,000 for a full package of external wall insulation, a new gas boiler, loft insulation and draught-proofing under ECO4. After the scheme covers the full cost for eligible households, your upfront payment is £0 if you qualify. Based on Energy Saving Trust figures, this home would save approximately £580 per year on heating bills, meaning the installation pays for itself immediately through grant funding. Over 25 years, the total savings reach £14,500, not accounting for future energy price rises. The work is managed by a TrustMark-registered installer who handles the entire application process on your behalf, so you never pay a penny. 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).
| Item | Figure |
|---|---|
| Upfront cost after grants | £0 |
| Yearly savings | £580 |
| Payback period | Immediate |
| 25-year lifetime savings | £14,500 |
What homeowners often get wrong
The most common mistake is assuming you can apply directly to the government for ECO4 funding, which is not possible under current rules. Here are three frequent errors that cost homeowners time and money.
- Applying to the wrong organisation Many homeowners contact Ofgem or their local council thinking they handle applications. The correct route is your energy supplier or a TrustMark-registered installer, only they can submit the paperwork and secure the funding.
- Ignoring the EPC requirement before starting Some homeowners book an installer before checking their EPC rating. If your home is rated C or above, you cannot proceed with ECO4, this wastes the installer’s time and your own, and you may miss other grant opportunities like the Great British Insulation Scheme.
- Assuming tenants cannot apply Private tenants often believe they are ineligible, but the scheme covers them if they receive qualifying benefits and have their landlord’s written permission. Failing to ask the landlord means missing out on fully funded upgrades worth thousands of pounds.
Quick reference
- You cannot apply directly to the government, contact your energy supplier or a TrustMark-registered installer to start the ECO4 process.
- Your household must receive a qualifying benefit or have an annual income under £31,000 to be eligible for the scheme.
- Your home must have an Energy Performance Certificate rating of D, E, F or G, homes rated A, B or C do not qualify.
- 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).
- Private tenants can apply with written permission from their landlord, but social housing residents are not eligible for this scheme.
Frequently Asked Questions
No, you cannot apply directly to the government. You must contact your energy supplier or a government-approved installer, according to GOV.UK, 2026.
Qualifying benefits include Pension Credit, Universal Credit, Income Support, and Jobseeker’s Allowance. Full list is on GOV.UK, 2026.
Up to £25,000 in energy-efficiency upgrades is available per household, as confirmed by the Department for Energy Security and Net Zero, 2026.
