Heat Pump vs. Gas Furnace in 2026: The Real Operating-Cost Math
Quick answer
A modern heat pump delivers 2.5–4 units of heat per unit of electricity, so it beats a gas furnace on operating cost wherever electricity costs less than roughly 3–3.5× the equivalent price of gas. In 2026, that's true across most of the U.S. — with the strongest savings for homes currently on propane, oil, or electric-resistance heat, and the weakest case in areas with very cheap gas and expensive electricity.
The one ratio that decides it
A gas furnace turns 1 therm of gas into about 0.95 therms of heat (95% AFUE). A cold-climate heat pump averages a seasonal COP of 2.5–3.5 — it moves 2.5–3.5× more heat than the electricity it consumes.
So the comparison collapses to one question: is your electricity price (per kWh) less than about 3× your gas price expressed per kWh-equivalent? One therm ≈ 29.3 kWh of heat. If gas costs $1.50/therm, gas heat costs about 5.4¢ per kWh of delivered heat. A heat pump at COP 3 and 15¢/kWh electricity delivers heat at 5.0¢ per kWh — already ahead, and further ahead in shoulder seasons when COP is higher.
Who saves the most by switching
- Propane and heating-oil homes: almost always save 30–50% — this is the strongest switch case in the country.
- Electric baseboard/resistance homes: save 50–65%, since a heat pump delivers the same heat with a third of the electricity.
- Natural gas homes in moderate climates: typically modest savings or parity, improving as utilities add heat-pump rates.
- Natural gas homes in very cold climates with cheap gas: may pay slightly more in January but less in spring/fall; dual-fuel setups hedge this.
Don't forget the cooling side
A heat pump replaces your air conditioner too, and modern variable-speed units typically cool 20–40% more efficiently than the 10–15-year-old AC they replace. For homes that were due for an AC replacement anyway, the fair comparison is heat pump vs. furnace + new AC — which changes both the upfront and operating math in the heat pump's favor.
Dual-fuel: the pragmatic middle path
If you have cheap gas and real winters, a dual-fuel system (heat pump with the gas furnace as backup below a set outdoor temperature) lets the heat pump run whenever it's the cheaper source and hands off to gas only in deep cold. Most smart thermostats can optimize the switchover point by price. It's also the lowest-risk way to electrify without betting the whole winter on one system.
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Frequently asked questions
- Is a heat pump cheaper to run than a gas furnace?
- In most of the U.S. in 2026, yes — modestly cheaper vs. natural gas and dramatically cheaper vs. propane, oil, or electric resistance. In regions with unusually cheap gas and expensive electricity, gas can still win on January bills.
- What is a good COP for a cold-climate heat pump?
- Look for a seasonal COP around 3 and a rated COP of at least 1.8–2.2 at 5°F. Capacity retention at 5°F (ideally 70–100% of rated capacity) matters as much as efficiency.
- Should I keep my gas furnace as backup?
- If it's mid-life and your winters are cold, dual-fuel is a sensible hedge. If the furnace is at end of life or you're on propane/oil, full replacement with a cold-climate heat pump plus resistance backup is usually simpler and cheaper to maintain.
- Do heat pumps raise your electric bill?
- Yes — your electric bill rises while your gas/propane/oil bill falls or disappears. Total energy spend is what matters; in most switch scenarios it goes down.