The full table of Boiler Upgrade Scheme amounts
The government publishes the grant values in a formal notice of approved grant categories. The version in force was updated on 21 July 2026 and lists 27 combinations of technology and property. They collapse into this:
| Technology | Property connected to gas | Off-gas, replacing oil | Off-gas, replacing LPG | Off-gas, replacing electric, coal, hybrid or other fossil fuel |
|---|---|---|---|---|
| Air-to-water heat pump | £7,500 | £9,000 | £9,000 | £7,500 |
| Ground source heat pump | £7,500 | £9,000 | £9,000 | £7,500 |
| Air-to-air heat pump (residential only) | £2,500 | £2,500 | £2,500 | £2,500 |
| Biomass boiler (rural only) | — | £5,000 | £5,000 | £5,000 |
Ofgem’s scheme page also lists water source heat pumps at £7,500. The £9,000 cells apply to applications properly made from 21 July 2026 up to 31 March 2027.
Heat pumps: £7,500, or £9,000 off the gas grid
For the two technologies that make up almost all of the scheme — 98% of paid grants have been for air source heat pumps — there are now two bands.
The standard £7,500
Any eligible property replacing gas, oil, LPG, electric or other fossil fuel heating with an air-to-water or ground source heat pump gets £7,500. That includes homes connected to mains gas, which make up the majority of grants paid: 55% of redemptions replaced gas.
The higher £9,000
GOV.UK words it as an additional £1,500 until March 2027, where the property is heated by oil or LPG and has no mains gas connection. Ofgem’s guidance sets the tests: the property is not fuelled by mains gas (capped or clamped meters count as gas), has no record of a gas meter point, is not attached to a heat network, and is not a new build. Self-builds are excluded from the higher band. In the first two months, 5,351 applications — 34% of all applications in July and August 2026 — were for the higher amount. Full detail: the £9,000 off-gas grant.
Air-to-air heat pumps: £2,500
Air-to-air heat pumps — the reverse-cycle units most people know as air conditioning — were added to the scheme by the amendment regulations in force from 28 April 2026. They are funded at £2,500 in residential properties only; the regulations say an air-to-air heat pump is not eligible in a non-residential building. As with any grant-funded system, it has to replace the existing fossil fuel or electric heating rather than sit alongside it. It does not attract the off-gas uplift, and because an air-to-air system heats air rather than water, it does not provide hot water — the installer will explain how hot water would be handled.
If you have read elsewhere that air conditioning is never covered by the scheme, that was true before 28 April 2026 and is not now.
Biomass boilers: £5,000
Biomass is funded in limited circumstances: the property must be off the gas grid and in a rural location, and the boiler must have an emissions certificate showing polluting emissions are kept to a minimum. Biomass cannot be funded in a self-build. Take-up is small — DESNZ counts 421 biomass redemptions in the life of the scheme. See the biomass boiler grant rules.
What gets nothing
- Hybrid heat pump systems (a heat pump working alongside a boiler).
- Replacing an existing low-carbon system, such as a heat pump or biomass boiler.
- A second grant at the same property — GOV.UK allows one grant per property.
- Gas or oil boilers of any kind. The scheme is not a boiler grant, despite its name.
- Heat batteries. The Energy Saving Trust lists a future £2,500 heat battery grant under “future funding updates”; it is not available yet.
The longer list, including solar panels and batteries, is on what the scheme does not cover.
How the amounts have changed
The scheme opened on 23 May 2022. The heat pump grant rose to £7,500 on 23 October 2023, from £5,000 for air source and £6,000 for ground source. Air-to-air arrived at £2,500 on 28 April 2026, and the £9,000 off-gas band started on 21 July 2026. The end date and budget page has the full timeline.
How the grant shows on your invoice
Since 28 April 2026 the installer must deduct the full value of the voucher from the amount quoted and must not ask you to pay it, unless the application is refused or the voucher revoked. So a correct quote shows three lines: the full price, the grant, and what you pay. If yours only shows one figure, ask for the breakdown.
To see what that leaves for your own job, try the calculator — or read our guides to the air source heat pump cost after the grant and ground source cost and grant. Running costs, including heat-pump tariffs, are covered in heat pump running costs.
What the grant leaves you to pay
No details needed. Change any figure to match your own quote or bills. Results are indicative — an MCS installer’s heat-loss survey and written quote are what count.
£5,408
Payable by you on this quote. The grant is deducted on the quote and invoice — you never receive it as cash.
Default quote = the official median installed cost for 2026 Q2 (DESNZ, published 24 September 2026), which includes the grant value. VAT on installing a heat pump in a home is 0% until 31 March 2027, then 5%.
Paying the balance after the grant
The grant comes off the price before you pay anything, so the question is only how to fund what is left. These are the routes people use — this site does not arrange credit or recommend a lender.
| Route | How it works | What to check |
|---|---|---|
| Savings | Pay the balance on the installer’s payment schedule. You own the system outright. | How much deposit is asked for up front, and whether it is protected under the installer’s consumer code. |
| 0% VAT | Applied by the installer on a supply-and-install job in a home until 31 March 2027; 5% after. | That the quote shows no VAT on the installation. Equipment bought without installation is standard-rated. |
| Mortgage further advance or green home loan | Some lenders offer borrowing earmarked for energy improvements, sometimes at reduced rates. | The representative APR, the total amount repayable and any fees — compare against simply paying from savings. |
| Installer-arranged credit | Some installers introduce a credit broker so the balance is paid monthly. | The lender must be authorised by the Financial Conduct Authority. Ask for the APR and total repayable in writing before you sign anything. |
| Scotland only | Home Energy Scotland offers an interest-free loan of up to £7,500 alongside its own grant (not the Boiler Upgrade Scheme). | Apply to Home Energy Scotland before work starts. |
Two things people get wrong about the amounts
“Installers just add the grant to the price.”
Compare with the official figure. DESNZ puts the median installed cost of a grant-funded air source heat pump at £12,908 in 2026 Q2 — 11% lower in real terms than in 2023 Q2 — and the Energy Saving Trust quotes around £12,000. A quote far above those needs an itemised explanation.
“I’m off-gas, so I must get the higher amount.”
Only if the old system runs on oil or LPG. Off-gas homes on electric heating, coal or other fuels get £7,500, as do new builds and self-builds.
The rule is narrower than most summaries make it sound, which is exactly why it catches people out.