How does the eco4 scheme work?

The ECO4 scheme provides energy-efficiency upgrades to low-income and vulnerable households in Great Britain, funded by a levy on energy suppliers, with eligible homes receiving measures like insulation or heating improvements at no direct cost (GOV.UK, 2026).

The scheme is not a grant you apply for directly. Instead, your energy supplier or a local authority manages the installation. Eligibility depends on your household income, receipt of certain benefits (such as Pension Credit or Universal Credit), and the energy efficiency rating of your home. If you own your home or rent privately, you may qualify, though private tenants need landlord permission. The scheme runs until March 2026 and covers measures like loft insulation, cavity wall insulation, solar panels, and heat pumps.

Eligibility criteria for ECO4 funding

You must receive at least one qualifying benefit, such as Income Support, Jobseeker’s Allowance, or Child Tax Credit with a household income under £19,000 per year (Ofgem, 2026). Your property must also have an Energy Performance Certificate (EPC) rating of D, E, F, or G. If you are on a low income but not on benefits, you may still qualify under the “flexible eligibility” route, which local authorities can approve. The scheme prioritises homes with the poorest energy efficiency (EPC E, F, or G) for deeper upgrades.

What measures ECO4 covers and how they are installed

Typical installations include loft insulation, cavity wall insulation, solid wall insulation (internal or external), underfloor insulation, heating controls, and renewable heating systems like air source heat pumps (Energy Saving Trust, 2026). Solar panels may also be installed if they improve your EPC rating. A certified installer approved by TrustMark or MCS will survey your home, then arrange the work. You pay nothing, the cost is covered by your energy supplier through the ECO levy. The installation typically takes one to five days, depending on the measures.

How to apply for ECO4 through your supplier

You cannot apply directly to the government. Instead, contact your energy supplier, such as British Gas, EDF, or Octopus Energy, and ask if they offer ECO4 installations (GOV.UK, 2026). They will check your eligibility and schedule a free survey. If you are a private renter, you need your landlord’s written consent. If your supplier does not participate, you can approach a local-authority-approved installer who works with multiple suppliers. The process is free, and you will not receive cash, only the installed measures. Once the work is done, your supplier issues a certificate of completion.

A worked example

A 1930s semi-detached house in Manchester with an EPC rating of E and a household receiving Pension Credit could receive a full air source heat pump and loft insulation package worth £14,000 at no direct cost through ECO4. The Energy Saving Trust estimates a well-insulated 3-bed semi saves roughly £1,100 per year on heating bills when switching from an old gas boiler to a heat pump. 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 25 years, the cumulative savings reach approximately £27,500, assuming a 2.5% annual energy price rise. The property’s EPC rating typically jumps from E to a C or B after the upgrades, increasing the home’s market value by an estimated 5% to 10% according to Energy Saving Trust data.

What homeowners often get wrong

The most common mistake is assuming you apply for ECO4 like a normal grant, it is not a direct application scheme but a supplier-led programme managed by your energy company or local authority. Here are three frequent misunderstandings that cost homeowners time and money.

1. Thinking you must own your home outright Many homeowners believe only owner-occupiers qualify. Private tenants can also receive ECO4 upgrades if their landlord gives written permission and the property meets the EPC D-G criteria, turning down free insulation could cost tenants £400 a year in wasted heating bills.
2. Believing you cannot qualify if you are working People on a salary often assume ECO4 is only for the unemployed. In fact, flexible eligibility lets local authorities approve households with a gross income under £31,000 in many areas, even without benefits, missing this route leaves £8,000 in free solar panels on the table.
3. Assuming the scheme covers any measure you want Homeowners sometimes request cavity wall insulation for a solid-wall Victorian terrace. ECO4 only funds measures that are technically suitable and cost-effective for your specific property, installing the wrong type voids the warranty and wastes the installer’s time, potentially delaying other upgrades for months.

Quick reference

• ECO4 runs until March 2026 and is funded by a levy on energy suppliers, not by taxpayer money.
• You must have an EPC rating of D, E, F, or G to qualify, homes rated A, B, or C are ineligible.
• Qualifying benefits include Pension Credit, Universal Credit, Income Support, and Child Tax Credit with household income under £19,000 per year.
• Flexible eligibility lets local authorities approve households on low incomes without benefits if the council deems them fuel-poor.
• Do not contact a random installer first, your energy supplier or local authority must manage the application to avoid scams and ensure funding is secured.