The typical air source heat pump installation costs £11,000–£15,000 after the Boiler Upgrade Scheme grant
Annual sales of heat pumps in the UK reached 60,000 in 2025, according to the Department for Energy Security and Net Zero (DESNZ) Heat Pump Market Update. This reflects growing consumer interest. The Boiler Upgrade Scheme (BUS) provides a £7,500 upfront grant toward installation costs, reducing the net homeowner cost to roughly £3,500–£7,500 for a standard system. Installation costs vary by property size, heat loss, and complexity, with larger homes or those needing radiator upgrades at the upper end.
The direct answer to the question “what does an air source heat pump cost in 2026?” is: after the £7,500 Boiler Upgrade Scheme grant, a typical installation costs between £3,500 and £7,500. Before the grant, the total installation cost ranges from £11,000 to £15,000, according to MCS Installation Database averages (MCS, 2026). The final figure depends on your property’s heat demand, whether you need new radiators, and the complexity of the installation.
Running costs for an air source heat pump are 20–40% lower than a gas boiler
Based on Ofgem’s April 2026 price cap (24.5p/kWh electricity, 6.0p/kWh gas), a heat pump with a seasonal coefficient of performance (SCOP) of 3.0 delivers heat at roughly 8.2p/kWh, compared to 6.0p/kWh for gas. The SCOP is the average efficiency of a heat pump over a full heating season, so a SCOP of 3.0 means it produces three units of heat for every unit of electricity used. Typical SCOP values of 3.0–3.5 mean running costs are 20–40% lower than gas, per Energy Saving Trust (EST) field trial data (Energy Saving Trust, 2026). For a three-bedroom home using 12,000 kWh of heat annually, the annual saving is roughly £200–£350 versus a modern gas boiler.
These savings assume your home has good insulation and your heat pump is sized correctly. If your home loses heat quickly, your heat pump will run longer and your savings will shrink.
Quick numbers upfront cost, annual savings, and payback period for a typical home
| Cost or saving category | Typical three-bedroom semi-detached home (12,000 kWh/year heat demand) |
|---|---|
| Upfront cost (before grant) | £11,000–£15,000 |
| Upfront cost (after £7,500 BUS grant) | £3,500–£7,500 |
| Annual heating running cost (heat pump) | £650–£800/year |
| Annual heating running cost (gas boiler) | £720–£1,000/year |
| Annual saving | £200–£350/year |
| Simple payback period (after grant) | 10–21 years |
Source: MCS Installation Database averages (MCS, 2026), EST running cost calculator (Energy Saving Trust, 2026), DESNZ Boiler Upgrade Scheme rates (GOV.UK, 2026).
The simple payback period ranges from 10 to 21 years after the grant
Payback is calculated as net installation cost divided by annual savings. A £5,000 net cost with £300 annual savings yields 16.7 years. Longer payback occurs if the home has poor insulation, requires radiator upgrades (£1,500–£3,000 extra), or has a high heat demand. Shorter payback (under 12 years) is possible in homes replacing electric storage heaters or oil boilers, where fuel costs are higher (Energy Saving Trust payback calculator, 2026).
The payback period is the time it takes for your annual fuel savings to equal the upfront cost you paid. For most gas-heated homes, this means you need to plan on staying in the property for 15–21 years to break even financially.
Your home needs an EPC rating of C or above to qualify for the £7,500 grant
The Boiler Upgrade Scheme requires the property to have a valid Energy Performance Certificate (EPC) with no outstanding recommendations for loft or cavity wall insulation (GOV.UK, 2026). Homes with EPC ratings D, E, F, or G must install insulation first to meet eligibility, adding £1,000–£4,000 to total project costs. The grant is available to homeowners in England and Wales. Scotland has a separate scheme through Home Energy Scotland.
Check your EPC before you get quotes. If your rating is below C, factor in the cost of insulation upgrades before you can claim the grant.
Air source heat pumps save the most money for homes off the gas grid
Households using oil, LPG, or electric storage heaters pay 12–25p/kWh for heat, making heat pump running costs 40–60% lower. For a typical oil-heated home using 15,000 kWh/year, annual savings reach £600–£900, cutting payback to 6–10 years (DESNZ Energy Trends fuel price data, 2026). Gas-heated homes see smaller savings, making the financial case weaker unless gas prices rise significantly.
If you are off the gas grid and currently heating with oil, LPG, or electric storage heaters, a heat pump is likely to save you substantial money each year. The payback period is short enough to make the investment worthwhile even if you move within a decade.
All installers must be MCS certified and TrustMark registered to unlock the grant
The Microgeneration Certification Scheme (MCS) ensures installers meet technical standards. Only MCS-certified installations qualify for the Boiler Upgrade Scheme (MCS, 2026). TrustMark registration provides consumer protection and a route for complaints. Check both on the MCS and TrustMark websites before you hire anyone. Get at least three quotes from MCS-registered installers, and verify their certification on the MCS Installer Database before paying a deposit (TrustMark, 2026).
The installer handles the BUS grant application on your behalf. Do not pay the full installation cost upfront. The grant is deducted from the price you pay, and the installer claims it from Ofgem after the work is done.
The real-world payback what the numbers mean for your decision
This is the direct answer to “air source heat pump cost”: net cost after grant £3,500–£7,500, annual savings £200–£900, payback 6–21 years depending on your current heating fuel and home efficiency. For gas-heated homes, payback is long (15–21 years) unless gas prices rise or you plan to stay 15+ years. For oil, LPG, or electric-heated homes, payback is shorter (6–12 years), making the investment more attractive financially. The grant is time-limited. Apply through your installer, who handles the BUS application on your behalf (GOV.UK, 2026).
How to compare heat pump quotes from MCS installers
Boiler Upgrade Scheme eligibility and application process 2026
Your decision should hinge on your current heating fuel and how long you plan to stay in your home. If you are on gas and plan to move within 10 years, the numbers do not work in your favour. If you are on oil or electric heating and plan to stay put, a heat pump is likely a sound financial move.
