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.
·4 min read
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