Which furnace is actually cheaper to run?
A gas furnace is usually cheaper to run in any climate cold enough to need real heat. The reason is the fuel price, not the equipment. Natural gas delivers heat for roughly a third to half the cost of resistance electric heat in most of the country, because electricity is an expensive way to make raw heat. Even a mid-efficiency 80% AFUE gas furnace typically beats a 100% efficient electric furnace on the monthly bill once temperatures drop.
Electric furnaces are rated 100% AFUE, which sounds like they win, but that number is misleading. It only means every watt becomes heat inside the house. It says nothing about what that watt costs. In states with high electric rates, an electric furnace running through a January cold snap can produce a heating bill that is two to three times what the same home would pay on gas. Run your room loads through our BTU calculator first so you are sizing for the heat you actually need.
When does an electric furnace make more sense?
An electric furnace makes sense when you have no gas line, when you live in a mild climate, or when you want the lowest possible install cost and maintenance. With no flue, no gas piping, and no combustion, the install is simpler and the unit itself is cheaper. It also lasts longer (commonly 20 to 30 years) because there are no burners, heat exchanger, or inducer motor to wear out or crack.
Safety is the other honest point in electric's favor. There is no combustion, so there is no risk of carbon monoxide and no gas leak to worry about. If your home is all-electric already, or running a new gas line would cost thousands, electric closes the gap. That said, in any climate with a real winter, the smarter all-electric move is usually a heat pump, not a resistance electric furnace. A heat pump moves heat instead of making it and can cut electric heating costs dramatically. See heat pump vs furnace for that comparison.
Are there tax credits or rebates in 2026?
There is no federal heat-pump or furnace tax credit for systems placed in service in 2026. The federal 25C credit that paid up to $2,000 on qualifying heat pumps expired for equipment installed after December 31, 2025. So do not count on a federal write-off for a 2026 furnace or heat pump install.
What still exists in 2026 are state rebates and utility programs, and they vary a lot by where you live. Programs like state HEEHRA and HOMES rebates and local utility incentives can knock real money off an efficient system, usually a heat pump rather than a furnace. Check your current state and utility incentives before you buy, because the dollar amounts and eligibility change year to year. Do not let a rebate alone pick your fuel; the running-cost difference over 15-plus years dwarfs most one-time rebates.
Gas furnace wins on
- +Much lower running cost where natural gas is available
- +Heats fast and stays cheap through hard cold snaps
- +Best total cost of ownership in cold climates
Electric furnace wins on
- +Cheaper to buy and install, no gas line or flue needed
- +Longer lifespan (20 to 30 years) with fewer moving parts
- +No combustion, so no carbon monoxide or gas-leak risk
The verdict
If you have natural gas and a real winter, get the gas furnace. The lower running cost over 15 to 20 years easily beats the electric unit's cheaper sticker price. Pick an electric furnace only when you have no gas line, you live in a mild climate, or budget forces the cheapest install. And if you are going all-electric anyway, look hard at a heat pump first; it will cost far less to run than a resistance electric furnace.
Related: Heat Pump vs Furnace, BTU Calculator.
Frequently asked questions
Is a gas or electric furnace cheaper to run?
A gas furnace is almost always cheaper to run where natural gas is available, often costing a third to half as much per unit of heat as an electric furnace. Electric furnaces are rated 100% efficient, but electricity is an expensive way to make heat, so the bill can run two to three times higher in cold climates.
Why is an electric furnace 100% efficient but still costs more?
The 100% AFUE rating only means every watt of electricity becomes heat in the home. It says nothing about fuel price. Electricity costs far more per unit of heat than natural gas, so a 100% efficient electric furnace can still cost more to run than an 80% efficient gas furnace.
Which furnace lasts longer?
Electric furnaces typically last 20 to 30 years because they have no burners, heat exchanger, or inducer motor to wear out. Gas furnaces usually last 15 to 20 years. The longer electric lifespan does not usually offset the higher running cost in cold climates.
Should I get a heat pump instead?
In most climates, yes, if you are choosing all-electric. A heat pump moves heat rather than making it, so it can cost far less to run than a resistance electric furnace. Compare them on our heat pump vs furnace page before committing to electric resistance heat.
Do gas furnaces still qualify for a federal tax credit in 2026?
No. The federal 25C credit expired for systems placed in service after December 31, 2025, so there is no federal furnace or heat-pump credit for 2026 installs. Check your current state and utility incentive programs instead, since those still exist and vary by location.