Guide · last reviewed 8 July 2026
Are heat pumps worth it in the UK?
Short version: almost always yes if you're off the gas grid(oil, LPG or electric), and increasingly yes on mains gas if your boiler's near the end anyway. Here's the honest maths for 2026.
The upfront cost, after the grant
A typical air source install is £10,000–£14,000, but the Boiler Upgrade Scheme knocks £7,500 off — £9,000 for off-grid homes from 21 July 2026 — so most people pay £2,500–£6,500. See the full breakdown in our cost guide.
Who benefits most
- Off-grid homes (oil, LPG, electric): the clearest win — big running-cost savings and the larger £9,000 grant. This is the sweet spot.
- Homeowners whose boiler is failing: if you're replacing anyway, the grant makes a heat pump competitive with a new gas boiler.
- Well-insulated homes: lower heat loss means a smaller, cheaper, more efficient system.
- Least compelling: a cheap, recent mains-gas boiler in a leaky home — here the case is comfort and carbon, not pure payback.
Running costs, honestly
A well-designed system with a seasonal efficiency of ~3.5–4 turns each unit of electricity into 3.5–4 units of heat. That roughly matches or modestly beats mains gas at 2026 prices, and clearly beats oil, LPG and direct electric. A badlydesigned system can cost more than gas — which is why the installer's survey and sizing matter far more than the brand of pump.
The honest caveats
- You need somewhere for the outdoor unit and a hot water cylinder (no combi-style instant hot water).
- Undersized radiators may need upgrading — factor a few hundred pounds each.
- Design quality varies wildly between installers, so quotes for the same home differ by £2,000+. Getting several is the single best thing you can do.
Frequently asked
Are heat pumps worth it in the UK in 2026?
For most homes off the gas grid (oil, LPG, electric) the answer is a clear yes — running costs drop sharply and the grant is £7,500, rising to £9,000 for off-grid homes from 21 July 2026. On mains gas it's more marginal: a well-designed system roughly matches or modestly beats gas bills, and the case is strongest if your boiler is due for replacement anyway.
How much can you save with a heat pump?
Against oil, LPG or direct electric heating, savings are typically several hundred pounds a year. Against mains gas, a well-designed system (seasonal efficiency ~3.5–4) roughly breaks even to modestly saves at 2026 prices. Design quality matters more than the brand of pump.
What's the payback time on a heat pump?
After the grant, upfront cost is usually £2,500–£6,500. Payback depends heavily on what you're replacing: fast for off-grid oil/LPG homes, longer (or lifestyle/comfort-driven) for those on cheap mains gas.
Do heat pumps work in cold UK weather?
Yes — air source heat pumps work well below freezing; they're standard across Scandinavia. The key is a correctly sized system from a proper heat-loss survey, not the outside temperature.
See the numbers for your home
Check your grant, then get free quotes from MCS-certified installers near you.
General information reflecting UK pricing and scheme rules as at July 2026 — not a quote or financial advice. Figures vary by property; always get a professional survey.