How much does a well pump cost per month in Montana?

About $7.10 a month, assuming 1,000 W, 1.5 hours a day, 365 days a year at 15.57¢/kWh.

How many kilowatt-hours does a well pump use?

Roughly 548 kWh a year under these assumptions, or 1.00 kWh for every hour it runs.

Is that expensive compared with other states?

Montana has the 19th cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $99.43 a year.

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Cost to run a well pump in Montana (August 2026 rates)

At 15.57¢ per kilowatt-hour — Montana's average residential price in August 2026 — running a well pump costs $85.25 a year. That is 14% less than the national average of $99.43. Montana's residential rate is up 9.0% from August 2025, which moves this appliance from $78.24 to $85.25 a year.

Per hour: 15.6¢
Per day of use: 23.4¢
Per month: $7.10
Per year: $85.25

Assumption: 1,000 W, 1.5 hours a day, 365 days a year — 548 kWh a year. A 1/2 to 3/4 HP submersible pump running about 90 minutes a day for an average household's water use. Use the calculator to swap in the numbers from your own model.

How Montana compares

Montana pays 15.57¢/kWh, the 19th cheapest residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $14.18 less a year than the typical U.S. household pays for the same use. Running the same well pump costs $69.64 a year in Nevada and $258 in Hawaii, so where you live changes this bill by $189 a year.

State	Rate	Per month	Per year
South Dakota	15.15¢	$6.91	$82.95
Kansas	15.47¢	$7.06	$84.70
Montana	15.57¢	$7.10	$85.25
South Carolina	15.76¢	$7.19	$86.29
Georgia	15.90¢	$7.25	$87.05

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

What else costs about the same in Montana

Dehumidifier$84.08 a year in MT Gaming pc$90.93 a year in MT Aquarium$92.07 a year in MT

Cutting the number down

A waterlogged pressure tank makes the pump short-cycle, which is hard on the motor and shows up on the bill.
A running toilet or dripping outdoor spigot runs the pump all night; leaks are the usual explanation for a sudden jump.

Questions

How much does a well pump cost per month in Montana?: About $7.10 a month, assuming 1,000 W, 1.5 hours a day, 365 days a year at 15.57¢/kWh.
How many kilowatt-hours does a well pump use?: Roughly 548 kWh a year under these assumptions, or 1.00 kWh for every hour it runs.
Is that expensive compared with other states?: Montana has the 19th cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $99.43 a year.