How much does a Wi-Fi router cost per month in South Dakota?

About $1.12 a month, assuming 10 W, 24 hours a day, 365 days a year at 15.36¢/kWh.

How many kilowatt-hours does a Wi-Fi router use?

Roughly 88 kWh a year under these assumptions, or 0.01 kWh for every hour it runs.

Is that expensive compared with other states?

South Dakota has the 19th cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $16.07 a year.

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Cost to run a Wi-Fi router in South Dakota (June 2026 rates)

At 15.36¢ per kilowatt-hour — South Dakota's average residential price in June 2026 — running a Wi-Fi router costs $13.46 a year. That is 16% less than the national average of $16.07. South Dakota's residential rate is up 8.0% from June 2025, which moves this appliance from $12.46 to $13.46 a year.

Per hour: 0.2¢
Per day of use: 3.7¢
Per month: $1.12
Per year: $13.46

Assumption: 10 W, 24 hours a day, 365 days a year — 88 kWh a year. Router plus modem. Mesh systems multiply this by the number of nodes. Use the calculator to swap in the numbers from your own model.

How South Dakota compares

South Dakota pays 15.36¢/kWh, the 19th cheapest residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $2.61 less a year than the typical U.S. household pays for the same use. Running the same Wi-Fi router costs $11.48 a year in Nevada and $46.18 in Hawaii, so where you live changes this bill by $34.70 a year.

State	Rate	Per month	Per year
Arizona	15.18¢	$1.11	$13.30
Wyoming	15.24¢	$1.11	$13.35
South Dakota	15.36¢	$1.12	$13.46
West Virginia	15.45¢	$1.13	$13.53
South Carolina	15.55¢	$1.14	$13.62

States ranked by average residential price, cheapest first. See all 51 states for a Wi-Fi router.

What else costs about the same in South Dakota

Ceiling fan$13.27 a year in SD Hair dryer$14.52 a year in SD Slow cooker$14.75 a year in SD

Cutting the number down

Small and always-on is the pattern worth understanding: 10 W around the clock is 88 kWh a year, more than a microwave.
Mesh nodes each carry their own around-the-clock draw, so an extra node is an extra annual line item.

Questions

How much does a Wi-Fi router cost per month in South Dakota?: About $1.12 a month, assuming 10 W, 24 hours a day, 365 days a year at 15.36¢/kWh.
How many kilowatt-hours does a Wi-Fi router use?: Roughly 88 kWh a year under these assumptions, or 0.01 kWh for every hour it runs.
Is that expensive compared with other states?: South Dakota has the 19th cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $16.07 a year.