Key facts (2026): The ECO4 (Energy Company Obligation) scheme provides free boiler replacements and heating upgrades to eligible households in England, Scotland, and Wales. You may qualify if you receive certain means-tested benefits (Universal Credit, Housing Benefit, Pension Credit, etc.) or live in a property with an EPC rating of D, E, F, or G. The scheme runs until March 2026.
Millions of UK households are sitting in cold, energy-inefficient homes while entitled to significant free upgrades under government schemes. The ECO4 scheme is one of the most valuable — a new boiler costs £2,000–£3,500 to install privately, but eligible households can receive this for free.
Who Qualifies for ECO4?
You may qualify if you or anyone in your household receives: Universal Credit; Housing Benefit; Pension Credit; Child Tax Credit; Working Tax Credit; Income Support; income-based JSA or ESA; Warm Home Discount Scheme Core Group 1; or DLA/PIP/Attendance Allowance in some circumstances. Your property must also have an EPC (Energy Performance Certificate) rating of D, E, F, or G. Privately rented properties also qualify if the landlord agrees to the installation.
What ECO4 Can Cover
Free boiler replacement (gas or oil boiler for eligible homes). First-time central heating installation for homes currently without central heating. Loft insulation (free for qualifying homes). Cavity wall insulation. Solid wall insulation (more complex, larger grant). Air source heat pump installation in some cases. Solar thermal heating. The specific measures available depend on your home's current energy efficiency rating and what improvements will make the biggest difference.
How to Apply for ECO4
Step 1: Check your eligibility at your energy supplier's website or at gov.uk/improve-energy-efficiency. Step 2: Contact your current energy supplier — all major suppliers participate in ECO4 and can assess your eligibility. Step 3: A surveyor visits to assess your property's suitability for the proposed measures. Step 4: Works are arranged and installed by approved contractors at no cost to you. You can also apply through an ECO4 registered installer — check the TrustMark or CIGA register for approved businesses.
Our Verdict
ECO4 is one of the most valuable government benefits that eligible households consistently fail to claim. A free boiler or insulation upgrade saves £200–£600/year in energy bills permanently. If you receive qualifying benefits and your home has a low EPC rating, contact your energy supplier directly to start the process — it costs nothing and the financial benefit is significant. The scheme closes in March 2026 so act promptly.
Frequently Asked Questions
How do I get a free boiler UK 2026?
Apply through your energy supplier or an ECO4-registered installer if you receive qualifying means-tested benefits and your home has an EPC rating of D or below.
What benefits qualify for ECO4?
Universal Credit, Housing Benefit, Pension Credit, Child Tax Credit, Working Tax Credit, Income Support, income-based JSA/ESA, and Warm Home Discount Core Group 1.
Is ECO4 still available in 2026?
The current ECO4 scheme runs until March 2026. A successor scheme is expected — check gov.uk/improve-energy-efficiency for current availability.
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Disclaimer: For informational purposes only. Verify with official sources before making decisions.
Last updated: April 2026 · Author: Chandraketu Tripathi
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