Heat pump running cost & savings calculator
Describe your UK home and see your running cost, your saving versus gas, oil or LPG, and payback after the £7,500 grant. Free, instant, no email, every number sourced.
Your standard rate. The tariff scenario is shown separately.
Efficiency. 3.5 is typical.
On a standard tariff (price cap)
electricity at 26.11p/kWh
£188 /yr saved
Heat pump £895/yr · payback 19.9 yrs
On a heat pump tariff (~15p/kWh)
cheap-rate electricity
£569 /yr saved
Heat pump £514/yr · payback 6.6 yrs
Heat pump tariffs (Octopus Cosy, EDF, Scottish Power) offered off-peak rates of about 14p to 15p/kWh in June 2026. The ~15p scenario assumes most heating runs in the cheap hours.
- Now: mains gas heating
- £1,083/yr
- Gas standing charge saved
- £106/yr
- Indicative system size
- ~6kW
- Install after grant
- £3,750
- CO₂ saved
- 1,730 kg/yr
If you buy through links on this site we may earn a commission. It never changes the price you pay.
Estimate only. Real figures depend on your home, install and tariff. Prices: Ofgem cap, Jul-Sep 2026.
Outside the UK?The prices and grant here are UK-specific. Tell us where you are and we’ll add it next.
How the numbers work
Your heat demand
How much heat your home needs per year, from your home type or your actual gas kWh.
Current vs heat pump
Current cost = heat / boiler efficiency x fuel price. Heat pump = heat / SCOP x electricity price.
Saving and payback
The yearly difference, then the install cost after the £7,500 grant divided by that saving.
Running cost by home type
Typical heat pump running cost for a 3-bedroom home (national cap, SCOP 3.5). Open one for every size.
Cheapest places to run a heat pump
Estimated yearly cost for a 3-bed semi, by supply region (Ofgem regional electricity prices), cheapest first.
- 1East Midlands (Nottingham, Leicester)£861/yr
- 2North East (Newcastle)£865/yr
- 3Yorkshire (Leeds, Sheffield)£868/yr
- 4West Midlands (Birmingham)£869/yr
- 5Scotland: south (Glasgow, Edinburgh)£886/yr
- 6North West (Manchester)£896/yr
- 7Wales: south (Cardiff, Swansea)£903/yr
- 8London£904/yr
- 9East Anglia & Eastern England£905/yr
- 10South West (Bristol, Devon, Cornwall)£905/yr
- 11Hampshire & Southern England£906/yr
- 12Scotland: north (Aberdeen, Highlands)£906/yr
- 13South East (Kent, Sussex, Surrey)£915/yr
- 14Merseyside & North Wales (Liverpool)£948/yr
Full league table: all 14 regions with gas prices, savings and CSV ›
Compare with your current fuel
Guides
All guides ›Cheapest and most expensive UK regions to run a heat pump (2026)
Heat pump running costs ranked across all 14 UK price-cap regions, from the East Midlands (25.1p/kWh) to Merseyside & North Wales (27.7p/kWh).
Heat pump vs gas boiler: the real running-cost comparison (2026)
Using 2026 Ofgem cap prices, what a heat pump actually costs to run versus a gas boiler, with worked examples by home type and the SCOP break-even point.
How much does a heat pump cost to run in the UK? (2026)
Typical heat pump running costs by home type and bedrooms, what drives the bill, and how to cut it, based on 2026 Ofgem price-cap figures.
Heat pump tariffs compared (2026)
Octopus Cosy, Scottish Power, Good Energy and EDF heat-pump tariffs compared: cheap-window rates around 14p to 15p per kWh versus the 26.11p price cap, and what a typical home saves.
How much does a heat pump cost to install in 2026
Typical air source installation costs from official scheme data, the £7,500 Boiler Upgrade Scheme grant, what moves quotes up or down, and how long the savings take to pay it back.
Frequently asked questions
Are heat pumps cheaper to run than a gas boiler?
It depends on the heat pump's efficiency (SCOP) and your prices. At the Ofgem cap (electricity 26.11p/kWh, gas 7.33p/kWh) a heat pump at SCOP 3.5 runs at a similar or slightly lower cost than a 90% gas boiler. A heat-pump electricity tariff or removing the gas standing charge makes it clearly cheaper.
How much is the heat pump grant in 2026?
The Boiler Upgrade Scheme gives £7,500 off an air source heat pump in England and Wales, rising to £9,000 for homes replacing oil or LPG from 21 July 2026. Your installer must be MCS certified and applies for the grant for you.
What is SCOP and why does it matter?
SCOP is how many units of heat a heat pump makes per unit of electricity over a year. A SCOP of 3.5 means 3.5 kWh of heat per 1 kWh of electricity. The higher the SCOP, the lower the running cost, so it is the single biggest factor in your bill.