How much does a gaming PC cost per month in Montana?

About $7.37 a month, assuming 400 W, 4 hours a day, 365 days a year at 15.14¢/kWh.

How many kilowatt-hours does a gaming PC use?

Roughly 584 kWh a year under these assumptions, or 0.40 kWh for every hour it runs.

Is that expensive compared with other states?

Montana has the 16th cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $107 a year.

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Cost to run a gaming PC in Montana (June 2026 rates)

At 15.14¢ per kilowatt-hour — Montana's average residential price in June 2026 — running a gaming PC costs $88.42 a year. That is 17% less than the national average of $107. Montana's residential rate is up 2.2% from June 2025, which moves this appliance from $86.49 to $88.42 a year.

Per hour: 6.1¢
Per day of use: 24.2¢
Per month: $7.37
Per year: $88.42

Assumption: 400 W, 4 hours a day, 365 days a year — 584 kWh a year. Under load with a mid-to-high-end GPU. Idling at the desktop is closer to 80 W, and the monitor is on top of this. Use the calculator to swap in the numbers from your own model.

How Montana compares

Montana pays 15.14¢/kWh, the 16th cheapest residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $18.69 less a year than the typical U.S. household pays for the same use. Running the same gaming PC costs $76.56 a year in Nevada and $308 in Hawaii, so where you live changes this bill by $231 a year.

State	Rate	Per month	Per year
New Mexico	15.06¢	$7.33	$87.95
Florida	15.10¢	$7.35	$88.18
Montana	15.14¢	$7.37	$88.42
Arizona	15.18¢	$7.39	$88.65
Wyoming	15.24¢	$7.42	$89.00

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

What else costs about the same in Montana

Aquarium$89.52 a year in MT Well pump$82.89 a year in MT Dehumidifier$81.76 a year in MT

Cutting the number down

Capping frame rate to the monitor's refresh rate cuts GPU draw substantially with no visible difference.
Sleep rather than idle: a machine left at the desktop overnight can use more in a year than the gaming itself.
Undervolting a modern GPU typically trims power meaningfully at near-identical performance.

Questions

How much does a gaming PC cost per month in Montana?: About $7.37 a month, assuming 400 W, 4 hours a day, 365 days a year at 15.14¢/kWh.
How many kilowatt-hours does a gaming PC use?: Roughly 584 kWh a year under these assumptions, or 0.40 kWh for every hour it runs.
Is that expensive compared with other states?: Montana has the 16th cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $107 a year.