The typical household energy bill is £1,928 a year under the October price cap, and that’s before winter heating kicks in. Yet millions of UK homes are leaving free money on the table. As reported by Uswitch, the average household could be missing out on hundreds of pounds in grants and rebates, simply because they don’t know what they’re eligible for.
Who qualifies, and who doesn’t
The biggest pot of unclaimed support is the Warm Home Discount, a £150 rebate on electricity bills for pensioners and low-income households on certain benefits. Ofgem data shows 2.3 million eligible homes did not receive it last winter. The catch: you must apply directly to your supplier if you’re not automatically identified. Most people wait for a letter that never comes.
Then there’s the Energy Company Obligation (ECO4), which funds insulation, boiler upgrades, and heat pumps for homes with an EPC rating of D or below and a household income under £31,000. The scheme runs until March 2026, but installers report that half of eligible households never contact their supplier. The government’s own figures show that 600,000 homes could get free cavity wall or loft insulation, but only if they ask.
What it costs a typical 3-bed semi
Take a 1970s semi-detached house in Manchester with an EPC rating of E. The owner, a single parent on Universal Credit, could receive:
- £150 Warm Home Discount (one-off)
- Free loft insulation worth £500–£800 (ECO4)
- Up to £5,000 towards a heat pump (Boiler Upgrade Scheme, if eligible)
Combined, that’s £5,650 in support. Yet the average claim rate for ECO4 in Greater Manchester is just 12%, according to local authority data shared with Energy Saving Trust. The barrier isn’t complexity, it’s awareness.
How to check and apply
Start at gov.uk/warm-home-discount for the rebate. For ECO4, contact your energy supplier directly, they are legally obliged to assess you. The Energy Saving Trust’s online grant checker takes three minutes. Applications for the Boiler Upgrade Scheme run through Ofgem’s portal.
But act fast. The Warm Home Discount window closes on 31 March each year. ECO4 funding is allocated on a first-come, first-served basis by suppliers. And the Boiler Upgrade Scheme budget for 2025–26 has already been 60% subscribed by November, according to Ofgem’s latest bulletin.
Check your eligibility today. Visit gov.uk or call your supplier. The money is there, it just needs you to ask.
Frequently Asked Questions
Not always. The Warm Home Discount requires certain benefits, but ECO4 covers households earning under £31,000 regardless of benefit status. The Boiler Upgrade Scheme is available to any homeowner with a valid EPC and a heat pump quote.
The Warm Home Discount is credited to your electricity account within 30 days of approval. ECO4-funded insulation can be installed within 6–8 weeks after a home survey. The Boiler Upgrade Scheme voucher is issued within 14 days of a valid application.
