Last reviewed: 16 April 2026By Eco Home Check Editorial Team
Yes, you can get a free boiler replacement in the UK in 2026. The route is ECO4, funded by energy suppliers, and it covers the full cost of a new boiler or heating system for qualifying households. You need to be on certain benefits and your home typically needs an EPC rating of D or below. About a third of UK households meet the criteria. Here's exactly how it works and how to check.
How the Free Boiler Scheme Actually Works
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There isn't really a single "free boiler scheme". There's ECO4, and that's what every "free boiler" advert on Facebook is referring to, even when the creative pretends otherwise. ECO4 stands for the Energy Company Obligation phase 4, and it's an energy efficiency obligation that the government places on large UK energy suppliers.
British Gas, EDF, E.ON, OVO, Octopus and Scottish Power are legally required to spend money every year improving energy efficiency in low-income homes. A new gas boiler is one of the measures they can fund. So are insulation, heating controls, solar thermal in some cases, and first-time central heating where the house doesn't already have it. The scheme replaced ECO3 in April 2022 and runs until December 2026. For a fuller picture of what's available beyond ECO4, see our boiler grants guide.
You don't apply to the government for a free boiler. You apply through an ECO4-registered installer or directly through a supplier's ECO4 referral team. The installer surveys your home, submits the funding application on your behalf, and if it's approved, fits the boiler at no cost to you.
The Facebook ads and the "CHECK IF YOU QUALIFY NOW" landing pages are almost always legitimate ECO4 installers marketing for leads. They're not scams. But they're not a government programme either, and the breathless urgency ("LAST CHANCE") is pure marketing. Anyway. The scheme exists, the money is real, and if you qualify it's worth sorting.
Who Qualifies for a Free Boiler
This is the bit most people get wrong. ECO4 is benefits-tested, not age-tested. Being a pensioner doesn't automatically qualify you. Being on Universal Credit at 28 does.
The main benefits that open the door:
Universal Credit
Pension Credit (Guarantee or Savings Credit)
Income Support
Income-based Jobseeker's Allowance
Income-related Employment and Support Allowance
Child Tax Credit
Working Tax Credit
Housing Benefit
If anyone in the household receives one of these, your home is on the radar. The benefit doesn't have to be in your name. A teenager on Universal Credit counts. An elderly parent living with you and receiving Pension Credit counts. Child Benefit on its own doesn't qualify, but Child Benefit combined with a household income under roughly £31,000 for single-parent households or £34,500 for couples does, under a separate route called the Child Benefit gateway.
Property requirements matter almost as much as benefits. Your home needs an EPC rating of D, E, F or G, according to GOV.UK guidance on ECO4. Most UK homes built before 2000 fall into this band, and a fair number of newer ones too. The current boiler also usually has to be old, inefficient, or broken. If it's a nine-year-old combi still running well, the scheme isn't designed for you. If it's a fifteen-year-old non-condensing unit or it packed up last winter, you're in the right territory.
There's a secondary route called flexible eligibility (sometimes written as LA Flex). Local authorities can identify households as fuel-poor even without the usual benefits, based on household income, health conditions, or energy costs as a share of income. If you're working full time but income is low and the bills are crippling, talk to your council. Sheffield, Nottingham and Cornwall councils all run active flex referral schemes. The criteria vary by authority, so the route is worth checking even if the main benefits list doesn't apply.
Who doesn't qualify: homeowners in band C or better who aren't on benefits, tenants in private rentals unless the landlord agrees and signs the paperwork, second homes, holiday lets, and recently purchased properties where the supplier suspects the buyer intends to flip the house.
The benefits list is wider than most people think. Energy Saving Trust estimates put about a third of UK households within ECO4 criteria. If anyone in your household receives any of the benefits above, it's worth checking. The worst that happens is they say no.
What You Actually Get
A new A-rated gas boiler. Usually a combi (Worcester Bosch, Ideal, Vaillant and Baxi are the brands you'll see most), sometimes a system boiler if the property suits one better.
The install covers the full job: removing the old boiler, fitting the new one, pipework and flue adjustments, thermostatic radiator valves on existing radiators, and a new programmable thermostat. In some cases it also includes first-time central heating if your home currently runs on electric storage heaters or a back boiler.
What you don't get: a heat pump (that's the Boiler Upgrade Scheme, a different grant with different funding). A boiler if yours is less than 10 years old and working fine. A like-for-like replacement of a back boiler just because you prefer the layout over the combi the surveyor specs.
How to Apply Step by Step
The process itself is simple enough once you know the order.
Check your eligibility through an installer or our checker (linked at the end of this guide).
An ECO4 installer surveys your home. Free, no obligation. They measure the boiler, check the EPC, confirm the benefits, photograph the property.
The installer applies to an energy supplier for funding approval. They handle this. You don't contact the supplier directly.
If approved, installation is booked. Typically 2 to 4 weeks after approval comes through.
You sign completion paperwork once the job's done. That's the Ofgem compliance record.
Start to finish, the process takes 4 to 8 weeks from first enquiry to a working new boiler. Faster if the installer has existing funding allocations ready to deploy, slower if the property needs remedial work first. Loft insulation often has to go in alongside a boiler so the home meets ECO4's final SAP improvement target, and that adds a week or two.
Two things to watch for. Installers who ask for money upfront aren't doing genuine ECO4 work. Full ECO4 funded jobs are fully funded. If you're being asked to pay "a contribution" or "a top-up" for anything that should be covered, stop and get a second opinion. Installers who pressure you to sign on the day of the survey are another red flag. Genuine ECO4 funding doesn't expire in 24 hours.
If the application is declined, that's usually because the SAP improvement maths didn't add up for the supplier (a new boiler alone doesn't always move a home up enough EPC bands to justify the spend). The fix is often adding insulation to the package so the combined measure delivers a bigger efficiency jump. A good installer will flag this at the survey stage rather than submit a doomed application.
Should You Get a Free Boiler or a Heat Pump Instead?
Honestly, this depends.
If you qualify for ECO4 and your home is poorly insulated, a free gas boiler is the quick win. It'll be fitted in a few weeks, you'll pay nothing, and your heating bills drop immediately. Hard to turn down.
But the Boiler Upgrade Scheme gives £7,500 off a heat pump, and a growing number of ECO4 installers can now deliver heat pumps under a combined ECO4 plus BUS funding package. If your home is already well insulated (cavity walls filled, loft at 270mm, double glazing throughout) a heat pump makes more long-term sense. If it's not, fix the insulation first (often free under ECO4 too) and revisit the heat pump question once the home is actually ready for one. Privately, a new gas boiler runs £2,000 to £4,500 installed depending on model and property, so the free route is genuinely meaningful money.
Cold callers and door-to-door sellers claiming to offer "government free boilers" are the warning sign. Government free boilers don't exist. ECO4-funded boilers exist, and no legitimate ECO4 installer runs cold-call campaigns. They rely on referrals from energy suppliers, affiliate sites and council flex schemes.
Three quick checks before you let an installer on site:
They're listed on the TrustMark register, the government-endorsed quality scheme for home retrofits.
They'll tell you which energy supplier is funding the job. Legitimate installers know. Fake ones fudge.
They don't ask for money upfront. Full stop.
If you'd rather skip the installer-first route, every major supplier has an ECO4 referral page. British Gas, EDF, E.ON, OVO and Octopus all take enquiries directly. They route you to their preferred installers, but the funding pathway is the same either way.
A free boiler is one of the better wins on the grants side of retrofit, and ECO4 runs until December 2026, which means the window to apply is narrowing with every passing month. Open the eligibility checker. Two minutes. You'll know whether ECO4 covers a new boiler for your home, and which other grants you could apply for at the same time.
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Grant amounts and eligibility criteria are based on publicly available government data and may change. Always verify current terms directly with the scheme provider.
Frequently asked questions
Can I get a free boiler in 2026?
Yes, through ECO4 if someone in your household receives qualifying benefits like Universal Credit, Pension Credit or Income Support, and your home has an EPC rating of D or below. Around a third of UK households meet the criteria, so it's worth checking before you pay out of pocket.
Do I need to be a pensioner to get a free boiler?
No. ECO4 is benefits-based, not age-based. Pensioners on Pension Credit qualify, but so does anyone on Universal Credit, Income Support, or another qualifying benefit.
How long does the free boiler process take?
Usually 4 to 8 weeks from first enquiry to a working new boiler. The installer survey and funding application take 2 to 4 weeks, then installation follows once approval comes through. Timing varies by installer workload and whether additional measures like loft insulation need fitting at the same time. Properties that need remedial work first tend to sit at the longer end of that range.
Can tenants get a free boiler?
Yes, but you need your landlord's written permission. The property goes on the ECO4 funding paperwork and the landlord has to sign off. Some landlords refuse because they don't want the disruption, others agree because their rental's EPC improves at no cost to them.
Is the free boiler scheme ending?
ECO4 runs until December 2026. That's the firm end date, which means applications submitted close to the deadline may not get through in time for installation. The government has signalled that a successor scheme under the Warm Homes Plan will replace it, but the detail isn't final yet. Historically, transitions between energy efficiency schemes leave gaps where nothing new is being funded. If you qualify now, applying now is safer than waiting to see what comes next.