How much does it cost to run a heat pump?
We've pre-filled a typical heat pump below. Set your electricity rate and adjust the hours to match how you use yours — the cost updates instantly.
A heat pump doesn't make heat, it moves it — pulling warmth out of the outside air (even cold air) and concentrating it indoors. That's why a 3,000-watt heat pump can heat a space a 3,000-watt space heater simply can't touch as cheaply: for every watt of electricity it uses, it typically delivers two to four watts' worth of heat, instead of the one-for-one trade you get from resistance heat.
Where the cost actually comes from is runtime, not wattage — run one 8 hours a day and you're paying for roughly 24 kWh, but that number swings hard with outdoor temperature. Below freezing, a heat pump has to work harder (and sometimes lean on backup resistance strips) to hit the same indoor temperature, so the same unit can cost noticeably more to run on a 20°F night than a 40°F one, even with the thermostat set identically.
What drives the cost of running a heat pump
- Outdoor temperature: colder air means a bigger gap between outside and target indoor temp, so the compressor runs longer and, in extreme cold, may trigger auxiliary resistance heat that costs far more per hour.
- Hours of runtime, not just wattage: at the typical 3,000W draw and 8 hours/day, you're looking at roughly 24 kWh/day — but that daily hour count is what actually varies most between mild and cold climates.
- System efficiency (COP): a well-matched, well-maintained heat pump can move 2-4x more heat energy than the electricity it consumes, so an aging or poorly sized unit can quietly cost much more for the same comfort.
How to cut it
- Skip the backup/emergency heat strip setting unless it's genuinely below freezing — that mode is closer to a space heater in cost.
- Keep filters and outdoor coils clean; a blocked unit runs longer to hit the same temperature.
- Use a programmable or smart thermostat to avoid big overnight setback swings — heat pumps recover slowly, and a large setback can trigger costly backup heat.
- Seal drafts and add insulation — every degree of heat loss is degree the compressor has to keep replacing.
Common questions
How much does it cost to run a heat pump per month?
At a typical 3,000W and about 8 hours a day, a heat pump costs roughly $122 a month at $0.17/kWh. Set your own rate and hours above for an exact figure.
How can I cut the cost of running a heat pump?
Skip the backup/emergency heat strip setting unless it's genuinely below freezing — that mode is closer to a space heater in cost.
Is a heat pump cheaper to run than a furnace or space heater?
Almost always yes for whole-space heating. A heat pump moves existing heat instead of generating it from scratch, so it typically delivers 2-4x more heat per watt than electric-resistance heat (like a space heater or heat strips), and often beats gas furnace running costs too depending on local gas vs. electricity prices.
Why does my heat pump cost more to run in extreme cold?
As outdoor temperatures drop, a heat pump has less ambient heat to extract and has to work harder to hit the same indoor setpoint. Below a certain threshold (often around 20-30°F depending on the unit), many systems bring on backup electric-resistance heat strips, which run at a much higher cost per hour than the heat pump alone.
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