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

About $21.53 a month, assuming 1,000 W, 1.5 hours a day, 365 days a year at 47.18¢/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?

Hawaii has the most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $99.43 a year.

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

At 47.18¢ per kilowatt-hour — Hawaii's average residential price in August 2026 — running a well pump costs $258 a year. That is 160% more than the national average of $99.43. Hawaii's residential rate is up 22.5% from August 2025, which moves this appliance from $211 to $258 a year.

Per hour: 47.2¢
Per day of use: 70.8¢
Per month: $21.53
Per year: $258

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 Hawaii compares

Hawaii pays 47.18¢/kWh, the most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $159 more 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
Alaska	29.41¢	$13.42	$161
California	29.75¢	$13.57	$163
Massachusetts	30.48¢	$13.91	$167
Maine	32.11¢	$14.65	$176
Hawaii	47.18¢	$21.53	$258

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

What else costs about the same in Hawaii

Dehumidifier$255 a year in HI Gaming pc$276 a year in HI Aquarium$279 a year in HI

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 Hawaii?: About $21.53 a month, assuming 1,000 W, 1.5 hours a day, 365 days a year at 47.18¢/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?: Hawaii has the most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $99.43 a year.