Energies

Electric vs Gas Heating Costs Compared UK

How electric and gas heating costs compare, running costs by home size, when electric heating makes sense, and the future of home heating. UK 2026 guide.

Gas has been the cheapest way to heat a UK home for decades, but the rise of heat pumps, smart tariffs, and energy efficiency improvements is changing the calculation. Here is how the options compare right now.

Running Cost Comparison

Heating type Fuel cost per kWh System efficiency Effective cost per kWh of heat Annual cost (3-bed home, 12,000 kWh heat demand)
Gas boiler (modern condensing) 7p 90% 7.8p £936
Oil boiler 6–8p 85% 7–9.4p £840–£1,128
LPG boiler 8–10p 85% 9.4–11.8p £1,128–£1,416
Air source heat pump 24p 300% (COP 3.0) 8p £960
Ground source heat pump 24p 400% (COP 4.0) 6p £720
Direct electric (panel heaters) 24p 100% 24p £2,880
Storage heaters (Economy 7) 12p off-peak 100% 12p ~£1,440
Infrared panels 24p 100% (but heats differently) 24p (lower usage claimed) £1,500–£2,400

Annual Heating Costs by Home Size

Gas Boiler vs Direct Electric vs Heat Pump

Home size Heat demand (kWh) Gas boiler Direct electric Air source heat pump
1-bed flat 5,000 £390 £1,200 £400
2-bed terraced 8,000 £625 £1,920 £640
3-bed semi 12,000 £936 £2,880 £960
4-bed detached 18,000 £1,404 £4,320 £1,440
5-bed detached 25,000 £1,950 £6,000 £2,000

Direct electric heating is 2.5–3.5× more expensive than gas or heat pumps.

Installation Costs

System Installation cost Lifespan Annual maintenance
Gas boiler £1,800–£4,500 12–15 years £80–£150
Air source heat pump £10,000–£18,000 (£7,500 BUS grant available) 20–25 years £100–£200
Ground source heat pump £15,000–£35,000 (£7,500 BUS grant available) 20–30 years £100–£200
Electric panel heaters £1,000–£3,000 (whole house) 15–20 years None
Storage heaters £2,000–£5,000 (whole house) 15–20 years None
Infrared panels £2,000–£5,000 (whole house) 20+ years None

10-Year Total Cost Comparison (3-Bed Home)

System Install cost 10-year running cost 10-year maintenance 10-year total
Gas boiler £3,000 £9,360 £1,200 £13,560
Air source heat pump (after BUS grant) £7,500 £9,600 £1,500 £18,600
Air source heat pump (no grant) £15,000 £9,600 £1,500 £26,100
Direct electric heaters £2,000 £28,800 £0 £30,800
Storage heaters (Economy 7) £3,500 £14,400 £0 £17,900

Gas boilers have the lowest 10-year total cost. Heat pumps (with the BUS grant) are competitive for longer time horizons.

When Electric Heating Makes Sense

Situation Why electric can work
Well-insulated new build flat Low heat demand means the cost difference is small
Rarely-used rooms Heating only when needed (no boiler idle losses)
Off-gas-grid property Avoids expensive oil or LPG — heat pump ideal
Holiday let or second home No boiler maintenance, no gas safety certificate needed
Supplementary heating Top up a room cheaply with a panel heater
No space for a boiler or cylinder Electric heaters need no external infrastructure
Solar panels + battery Use free solar electricity for heating daytime

When Gas Heating Is Better

Situation Why gas wins
On the gas grid Gas is the cheapest fuel for heating
Older, less insulated home High heat demand makes gas savings significant
Multiple bathrooms needing hot water Combi or system boiler delivers hot water efficiently
Budget-constrained Gas boiler is cheapest to install
Family home with high usage Running costs matter more with high demand

Heat Pumps — The Middle Ground

Advantage Explanation
Running costs similar to gas COP of 3.0+ means 1 kWh of electricity produces 3 kWh of heat
Government grant available BUS provides £7,500 towards installation
No gas needed Works on electricity only
Lower carbon Especially as the grid gets greener
Longer lifespan 20–25 years vs 12–15 for a gas boiler
Cooling in summer Some models reverse to provide cooling
Disadvantage Explanation
Higher upfront cost Even with grant, more expensive than gas boiler
May need radiator upgrades Heat pumps work at lower temperatures
Needs outdoor space External unit required
Less effective in poorly insulated homes Best with good insulation (EPC C or better)
Hot water needs a cylinder No instant hot water like a combi boiler

Future of UK Home Heating

Development Status
New build gas boiler ban From 2025 — new homes must have low-carbon heating
Existing home gas boiler ban No ban confirmed — government encourages switching
Boiler Upgrade Scheme Extended to 2028 (£7,500 for heat pumps)
Clean Heat Market Mechanism Requires boiler manufacturers to sell a proportion of heat pumps
Hydrogen for heating Trials ongoing but unlikely to be widespread before 2035
Heat networks Growing in new developments and urban areas
Electricity prices Expected to fall relative to gas as renewables expand

Related guides: