How much does a heat pump cost per month in Illinois?

About $34.78 a month, assuming 2,400 W at a 60% duty cycle, 10 hours a day, 150 days a year at 19.32¢/kWh.

How many kilowatt-hours does a heat pump use?

Roughly 2,160 kWh a year under these assumptions, or 1.44 kWh for every hour it runs.

Is that expensive compared with other states?

Illinois has the 18th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $392 a year.

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Cost to run a heat pump in Illinois (August 2026 rates)

At 19.32¢ per kilowatt-hour — Illinois's average residential price in August 2026 — running a heat pump costs $417 a year. That is 6% more than the national average of $392. Illinois's residential rate is up 7.2% from August 2025, which moves this appliance from $389 to $417 a year.

Per hour: 27.8¢
Per day of use: $2.78
Per month: $34.78
Per year: $417

Assumption: 2,400 W at a 60% duty cycle, 10 hours a day, 150 days a year — 2,160 kWh a year. A mid-size ducted heat pump in heating mode. It moves heat rather than making it, delivering two to four units of heat per unit of electricity until the outdoor temperature drops far enough to trigger backup resistance strips. Use the calculator to swap in the numbers from your own model.

How Illinois compares

Illinois pays 19.32¢/kWh, the 18th most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $25.06 more a year than the typical U.S. household pays for the same use. Running the same heat pump costs $275 a year in Nevada and $1,019 in Hawaii, so where you live changes this bill by $744 a year.

State	Rate	Per month	Per year
Virginia	17.64¢	$31.75	$381
Delaware	18.70¢	$33.66	$404
Illinois	19.32¢	$34.78	$417
Ohio	19.38¢	$34.88	$419
Wisconsin	19.41¢	$34.94	$419

States ranked by average residential price, cheapest first. See all 51 states for a heat pump.

What else costs about the same in Illinois

Central air conditioner$454 a year in IL Hot tub$483 a year in IL Pool pump$334 a year in IL

Cutting the number down

Auxiliary resistance heat is the expensive mode. Big thermostat setbacks trigger it on recovery, so a steady setting usually beats aggressive setbacks.
Cold-climate models hold useful capacity well below freezing; older units fall back to strips much sooner.
Keeping the outdoor coil clear of snow, leaves and shrubs protects the efficiency you paid for.

Questions

How much does a heat pump cost per month in Illinois?: About $34.78 a month, assuming 2,400 W at a 60% duty cycle, 10 hours a day, 150 days a year at 19.32¢/kWh.
How many kilowatt-hours does a heat pump use?: Roughly 2,160 kWh a year under these assumptions, or 1.44 kWh for every hour it runs.
Is that expensive compared with other states?: Illinois has the 18th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $392 a year.