Heat Pump Savings Calculator
See how much you could save by switching to an air source heat pump — with government funding applied.
Tell us about your home
£50£400
Your results update instantly
Move the bill slider or change your heating type and property size to compare the estimated savings.Your estimated savings
Estimated annual saving on heating
£121
Current heating: £1,440/year · Heat pump estimate: £1,319/year
Recommended system size
8–10 kW
New annual heating cost
£1,319
BUS Grant Contribution
60% covered
£7,500 of the estimated cost
20-year heating savings
£2,420
CO₂ saved / year
2,888 kg
Trees equivalent
133 trees
Estimated Heat-Pump System
8–10 kW Air Source Heat Pump
Installation estimate£12,500BUS grant contribution£7,500Estimated customer cost£5,000
Solar + Heat Pump
Find out what solar + a heat pump could save you
We’ll assess your roof, heating and energy use together to give you a personalised combined-system estimate.
Get My Combined Savings Estimate →📊 How we calculate
Based on Ofgem's July–September 2026 price cap (average 26.11p/kWh electricity and 7.33p/kWh gas), an estimated seasonal heat-pump performance of 3.5, and standard boiler efficiencies. Oil and LPG rates are based on UK averages. Grant, system size, installation cost and savings are estimates and will be confirmed during a free home survey.