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

About $6.84 a month, assuming 1,000 W, 1.5 hours a day, 365 days a year at 14.99¢/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 14th cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $100 a year.

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

At 14.99¢ per kilowatt-hour — Montana's average residential price in July 2026 — running a well pump costs $82.07 a year. That is 18% less than the national average of $100. Montana's residential rate is up 5.0% from July 2025, which moves this appliance from $78.13 to $82.07 a year.

Per hour: 15.0¢
Per day of use: 22.5¢
Per month: $6.84
Per year: $82.07

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 14.99¢/kWh, the 14th cheapest residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $18.18 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 Louisiana and $263 in Hawaii, so where you live changes this bill by $193 a year.

State	Rate	Per month	Per year
Mississippi	14.54¢	$6.63	$79.61
Washington	14.71¢	$6.71	$80.54
Montana	14.99¢	$6.84	$82.07
Florida	15.03¢	$6.86	$82.29
North Carolina	15.16¢	$6.92	$83.00

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$80.95 a year in MT Gaming pc$87.54 a year in MT Aquarium$88.64 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 $6.84 a month, assuming 1,000 W, 1.5 hours a day, 365 days a year at 14.99¢/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 14th cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $100 a year.