Home Energy Efficiency UK 2026 — Grants, Upgrades and Savings Guide

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 typeFuel cost per kWhSystem efficiencyEffective cost per kWh of heatAnnual cost (3-bed home, 12,000 kWh heat demand)
Gas boiler (modern condensing)7p90%7.8p£936
Oil boiler6–8p85%7–9.4p£840–£1,128
LPG boiler8–10p85%9.4–11.8p£1,128–£1,416
Air source heat pump24p300% (COP 3.0)8p£960
Ground source heat pump24p400% (COP 4.0)6p£720
Direct electric (panel heaters)24p100%24p£2,880
Storage heaters (Economy 7)12p off-peak100%12p~£1,440
Infrared panels24p100% (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 sizeHeat demand (kWh)Gas boilerDirect electricAir source heat pump
1-bed flat5,000£390£1,200£400
2-bed terraced8,000£625£1,920£640
3-bed semi12,000£936£2,880£960
4-bed detached18,000£1,404£4,320£1,440
5-bed detached25,000£1,950£6,000£2,000

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

Installation Costs

SystemInstallation costLifespanAnnual maintenance
Gas boiler£1,800–£4,50012–15 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 yearsNone
Storage heaters£2,000–£5,000 (whole house)15–20 yearsNone
Infrared panels£2,000–£5,000 (whole house)20+ yearsNone

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

SystemInstall cost10-year running cost10-year maintenance10-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

SituationWhy electric can work
Well-insulated new build flatLow heat demand means the cost difference is small
Rarely-used roomsHeating only when needed (no boiler idle losses)
Off-gas-grid propertyAvoids expensive oil or LPG — heat pump ideal
Holiday let or second homeNo boiler maintenance, no gas safety certificate needed
Supplementary heatingTop up a room cheaply with a panel heater
No space for a boiler or cylinderElectric heaters need no external infrastructure
Solar panels + batteryUse free solar electricity for heating daytime

When Gas Heating Is Better

SituationWhy gas wins
On the gas gridGas is the cheapest fuel for heating
Older, less insulated homeHigh heat demand makes gas savings significant
Multiple bathrooms needing hot waterCombi or system boiler delivers hot water efficiently
Budget-constrainedGas boiler is cheapest to install
Family home with high usageRunning costs matter more with high demand

Heat Pumps — The Middle Ground

AdvantageExplanation
Running costs similar to gasCOP of 3.0+ means 1 kWh of electricity produces 3 kWh of heat
Government grant availableBUS provides £7,500 towards installation
No gas neededWorks on electricity only
Lower carbonEspecially as the grid gets greener
Longer lifespan20–25 years vs 12–15 for a gas boiler
Cooling in summerSome models reverse to provide cooling
DisadvantageExplanation
Higher upfront costEven with grant, more expensive than gas boiler
May need radiator upgradesHeat pumps work at lower temperatures
Needs outdoor spaceExternal unit required
Less effective in poorly insulated homesBest with good insulation (EPC C or better)
Hot water needs a cylinderNo instant hot water like a combi boiler

Future of UK Home Heating

DevelopmentStatus
New build gas boiler banFrom 2025 — new homes must have low-carbon heating
Existing home gas boiler banNo ban confirmed — government encourages switching
Boiler Upgrade SchemeExtended to 2028 (£7,500 for heat pumps)
Clean Heat Market MechanismRequires boiler manufacturers to sell a proportion of heat pumps
Hydrogen for heatingTrials ongoing but unlikely to be widespread before 2035
Heat networksGrowing in new developments and urban areas
Electricity pricesExpected to fall relative to gas as renewables expand

Related guides:

Sources

  1. Ofgem — Energy consumers
  2. Citizens Advice — Energy