Warm Homes Loan Scheme: 0% Financing for Heat Pumps, Solar and Batteries Launches This Month
A new government-backed scheme cuts the interest rate on loans for heat pumps, solar panels and batteries. Here's what it actually is, what it isn't, and how to get ready.
💷 Confirmed launching September 2026. If you've read it launches in 2027, that's outdated — the official Scheme Rules confirm the public launch is this month.
Quick answer: The Warm Homes Loan Scheme is a government-backed subsidy paid to lenders — worth up to 20% of your loan — which they must pass on entirely as a lower interest rate. It's a loan, not a grant, and you apply to a normal FCA-regulated lender, not the government. Loan caps: £15,000 for solar PV, £15,000 for battery storage, and £20,000-£35,000 for heat pumps depending on type. No income test, no minimum EPC, open to owner-occupiers and private landlords UK-wide. Public launch is confirmed for September 2026.
What the Warm Homes Loan Scheme Actually Is
Most people hear "Warm Homes Loan Scheme" and assume it's a grant. It isn't. The government pays a capital grant, worth up to 20% of each loan amount, directly to participating lenders — not to you. The rules require every penny of that support to reach the borrower as a reduced interest rate, not sit with the lender as extra profit.
In practice, this means you still apply to a normal high-street bank or FCA-regulated finance provider, go through the same credit and affordability checks as any other loan, and repay a smaller amount overall than you would on a standard home improvement loan for the same project. The government isn't lending you money directly — it's subsidising the lender to offer you a cheaper rate than they otherwise would.
💡 Why this matters in real terms: the average APR on an unsecured £10,000 personal loan is currently around 12.3%. Over five years, that's roughly £3,842 in pure interest on top of what you actually borrowed — a genuine dent in the return on a solar or battery investment. A scheme specifically designed to knock points off that rate has a real, calculable effect on whether a project pays for itself.
Loan Caps by Category
The solar and battery caps apply separately, meaning a combined solar-plus-battery system could genuinely draw on up to £30,000 of subsidised borrowing. A detail worth knowing that most explainers miss: the heat pump loan can also cover the radiators and pipework a heat pump often needs to run efficiently — not just the unit itself, which matters given how often upgraded radiators get treated as a separate, unbudgeted cost.
This scheme sits alongside, not instead of, the existing £7,500–£9,000 Boiler Upgrade Scheme grant — the loan finances what's left over after any grant is applied, at a subsidised rate, rather than replacing the grant.
Who Qualifies
- ✅Owner-occupiers of existing homes
- ✅Private landlords, borrowing personally, one loan per property
- ✅No income threshold, no minimum EPC rating at scheme level
- ⚠️Lenders still apply their own credit and affordability checks — the scheme opens the door, the lender decides who walks through it
This is a genuinely different eligibility profile from the means-tested Warm Homes Local Grant (delivered via your council for eligible low-income households) — this loan scheme is aimed at "able to pay" households who want to spread the cost rather than fund it upfront, not a benefits-based scheme.
How to Get Loan-Ready Now
There's genuinely no consumer application form yet — lenders are still being onboarded, with products expected from September 2026 at the earliest. But there's real prep worth doing now:
Get an itemised MCS-certified quote
The published Scheme Rules require lenders to see an itemised quote from an MCS-certified installer, on headed paper, showing the MCS number and system size, dated within six months of your application.
Check your existing lender relationships
If you already bank with a major high-street lender, it's worth watching whether they're among those onboarded — building societies and mainstream banks are the most likely early participants.
Get your BUS grant application moving in parallel
If you're doing a heat pump, sort the grant side first through an MCS installer — the loan then covers whatever's left after the grant, rather than the two processes needing to happen in a specific order.
⚠️ Watch out for: websites currently collecting your details for the "Warm Homes Loan Scheme" are gathering leads, not applications — there is no consumer-facing application anywhere yet, since lenders are still being onboarded. Be cautious of anything asking for personal or financial details before the scheme has genuinely launched, and go directly to gov.uk for the authoritative status.
Timeline
- June 2026 — first lender application window opened
- 17 July 2026 — first lender application window closed
- July–August 2026 — product approval process
- September 2026 — public launch, products expected from participating lenders
- Late 2026 — second lender application window opens, for onboarding in early 2027
Frequently Asked Questions
Related Guides
Published September 2026. Based on the UK government's official Warm Homes Loan Scheme Scheme Rules (published June 2026). Participating lenders, exact rates and individual eligibility criteria had not been confirmed at time of writing — always check gov.uk for the current, authoritative status before applying anywhere.
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