Heat pumps cost less to run than most furnaces and air conditioners, but the actual bill depends on your climate, electricity rates, and how well your home is insulated
A heat pump's monthly cost is roughly 30 to 50 percent lower than running a traditional gas furnace and central air separately, according to data from the U.S. Department of Energy. The reason is efficiency: a heat pump moves heat rather than generating it, so it uses less energy to warm or cool your home. But "lower" does not mean "cheap." In a cold climate where you run heating six months a year, you will still see a substantial bill. In a mild climate, the savings are steeper.
The real number depends on three things you can measure: your local electricity rate per kilowatt-hour, the size of your home, and how many hours per month the heat pump actually runs. A 3-ton heat pump in a 2,000-square-foot house in a moderate climate typically costs between $80 and $150 per month to heat and cool year-round, but that range widens in either direction depending on where you live and how you use it.
Key Takeaways
- Heat pumps cost 30 to 50 percent less per month than running a furnace and air conditioner together because they move heat instead of creating it.
- Your actual monthly cost depends on your electricity rate, the size of your home, how many months you need heating or cooling, and how well insulated your home is.
- A 3-ton heat pump in a moderate climate typically costs $80 to $150 per month year-round, but costs more in very cold climates and less in mild ones.
- Turning the thermostat down by 7 to 10 degrees for eight hours a day can cut your heating bill by 10 to 15 percent.
How to estimate your own monthly cost
Start with your electricity rate. Check your most recent power bill — it will show your rate per kilowatt-hour, usually between $0.10 and $0.20 depending on your state and utility. A heat pump typically draws 3 to 5 kilowatts when actively heating or cooling.
Next, estimate how many hours per month the unit runs. In winter, a heat pump in a cold climate might run 8 to 12 hours per day. In summer, it might run 6 to 10 hours per day. A mild climate might see only 4 to 6 hours per day year-round. Multiply your daily hours by 30, then multiply that by your kilowatt draw and your electricity rate. A heat pump drawing 4 kilowatts for 8 hours a day at $0.14 per kilowatt-hour costs roughly $13.44 per day, or about $400 per month during heavy use.
That math is rough because heat pumps do not run at full power constantly — they modulate down when the home is close to the target temperature. A more realistic estimate is 60 to 70 percent of that peak number, so the same unit would cost closer to $240 to $280 per month during its heaviest season.
Why cold climates cost more to heat
A heat pump becomes less efficient as outdoor temperature drops. Below 32 degrees Fahrenheit, the unit has to work harder to extract heat from cold air, and many heat pumps switch to electric resistance heating — essentially a backup furnace — when the temperature falls below 20 degrees. That resistance heating costs significantly more per unit of warmth than the heat pump itself.
In Minnesota, Maine, or upstate New York, where winter temperatures regularly drop below zero, a heat pump's heating bill can approach or match what a gas furnace would cost. The advantage shrinks because the unit spends months in low-efficiency mode. In those climates, a hybrid system — a heat pump paired with a gas furnace that kicks in during the coldest weeks — often makes more financial sense than a heat pump alone.
Mild climates like coastal California, the Pacific Northwest, or the Southeast see the biggest savings because the heat pump runs efficiently most of the year and rarely needs backup heating.
Comparing heat pump costs to other heating and cooling systems
| System | Typical monthly cost (moderate climate) | Notes |
|---|---|---|
| Heat pump alone | $100–$150 | Lowest cost in mild climates; less efficient below 20°F |
| Gas furnace + air conditioner | $140–$200 | Higher heating cost; separate systems for each season |
| Heat pump + gas furnace (hybrid) | $110–$160 | Best efficiency in cold climates; uses gas only in extreme cold |
| Electric resistance heating + air conditioner | $180–$250 | Most expensive option; no heat pump efficiency |
These figures assume a 2,000-square-foot home in a climate with moderate heating and cooling needs. Actual costs vary by region, utility rates, and home size.
How insulation and air sealing affect your bill
A heat pump in a poorly insulated home will run longer and cost more than the same unit in a well-sealed house. If your attic has less than 12 inches of insulation, your walls lack insulation, or your windows are single-pane, the heat pump will cycle on and off more frequently to maintain temperature.
Adding insulation to your attic, sealing air leaks around doors and windows, and upgrading to double-pane windows can cut your heating and cooling costs by 15 to 25 percent. Those improvements pay for themselves faster than a new heat pump and work with whatever system you have. If you are considering a heat pump, addressing insulation first will lower the size and cost of the unit you need.
Ways to lower your heat pump operating costs
Adjust your thermostat. Lowering the temperature by 7 to 10 degrees for eight hours a day — overnight or while you are away — cuts heating costs by roughly 10 to 15 percent. A programmable or smart thermostat does this automatically and pays for itself within two to three years.
Keep the outdoor unit clear. Snow, ice, leaves, and debris block airflow and force the heat pump to work harder. Clearing the area around the outdoor unit takes five minutes and can improve efficiency by 5 to 10 percent.
Use ceiling fans in summer. A ceiling fan moving air downward helps the heat pump cool more efficiently and lets you raise the thermostat by 2 to 3 degrees without feeling warmer. That small change reduces cooling costs by 5 to 10 percent.
Close off unused rooms. If you have a spare bedroom or office you rarely use, closing the door and lowering the vent reduces the space the heat pump must condition. This works only if your system has zone control or dampers; otherwise, closing vents can strain the unit.
What affects your electricity rate
Your monthly bill depends partly on something you cannot control: your utility's rate per kilowatt-hour. Louisiana and Washington have rates around $0.10 per kilowatt-hour because of abundant hydroelectric power. Massachusetts and Hawaii pay $0.20 or more. That difference alone means a heat pump costs roughly twice as much to run in Hawaii as in Louisiana, even in the same climate.
Some utilities offer time-of-use rates, where electricity costs less during off-peak hours (usually late evening and early morning). If your utility offers this plan and your heat pump has a smart controller, you can program it to do most of its heating or cooling during cheap hours. This can reduce your bill by 10 to 20 percent, though it requires planning and may not work well if you need comfort during peak hours.
Frequently Asked Questions
Is a heat pump cheaper to run than a gas furnace?
Yes, in most climates. A heat pump costs 30 to 50 percent less per month than a gas furnace plus air conditioner. In very cold climates where the heat pump switches to electric resistance heating for months at a time, the savings shrink or disappear. A hybrid system — heat pump with gas backup — is often the best choice in those regions.
Do heat pumps cost more in winter or summer?
It depends on your climate. In cold regions, winter heating costs more because the heat pump works harder and less efficiently. In hot regions, summer cooling costs more because the unit runs longer. In mild climates, the costs are roughly equal year-round.
How much does a heat pump cost per hour to run?
A typical 3-ton heat pump draws 3 to 5 kilowatts when running. At an average electricity rate of $0.14 per kilowatt-hour, that is roughly $0.42 to $0.70 per hour of active operation. Most heat pumps do not run continuously; they cycle on and off, so your actual hourly cost is lower.
Will a smart thermostat save money with a heat pump?
Yes. A smart thermostat can cut heating and cooling costs by 10 to 15 percent by automatically lowering the temperature when you are away or asleep. Most smart thermostats cost $200 to $400 and pay for themselves within two to three years through lower bills.
Can I reduce heat pump costs by running it less?
You can lower your bill by raising the thermostat in summer and lowering it in winter, but running the heat pump less does not change its efficiency — it just means you are less comfortable. The most cost-effective approach is to improve insulation and air sealing so the heat pump does not have to work as hard to maintain your desired temperature.