Calculators
Heat pump grant calculator
Find out which Boiler Upgrade Scheme grant applies to your home and what you'd pay after it's deducted — in seconds.
Which grant applies to you?
The Boiler Upgrade Scheme gives £7,500 toward an air source or ground source heat pump for most homes, and a higher £9,000 for off-gas-grid homes currently on oil or LPG (available 21 July 2026 to 31 March 2027). The grant is deducted by your installer from the invoice before you pay.
Our main cost calculator applies the right grant to your property automatically and shows your net cost after it — it's the grant calculator and cost calculator in one.
It asks five quick questions and shows your system size, install cost, grant amount and net cost.
Grant amounts at a glance
| Your current heating | Grant |
|---|---|
| Mains gas | £7,500 |
| Electric (storage/direct) | £7,500 |
| Oil (off-grid) | £9,000 (21 Jul 2026 – 31 Mar 2027) |
| LPG (off-grid) | £9,000 (21 Jul 2026 – 31 Mar 2027) |
Full detail on the Boiler Upgrade Scheme page, including eligibility and how it's paid.
Get a tailored estimate and a fixed quote
These tools give indicative figures. For your real numbers and the grant applied, use the full calculator or call us.