Energy Calculators

Electricity rates in Idaho

The average residential electricity price in Idaho was 13.37¢/kWh in August 2026, 26.4% below the U.S. average of 18.16¢/kWh (EIA).

Average price (Aug 2026)
13.37¢/kWh
Change vs Aug 2025
+10.7%+1.29¢/kWh
Rank (1 = most expensive)
47thof 51
vs U.S. average
−26.4%−4.79¢/kWh

Idaho residential electricity price, last 12 months

Idaho vs U.S. average residential electricity price, last 12 monthsIdaho: 12.5¢ in Sep 2025, 13.4¢ in Aug 2026. Low 11.9¢, high 14.4¢.10.0¢12.0¢14.0¢16.0¢18.0¢20.0¢Nov 2025Feb 2026May 2026Aug 2026
· cents per kWh
Show data table
MonthIdahoU.S. average
Aug 202613.4¢18.2¢
Jul 202613.7¢18.3¢
Jun 202614.4¢18.4¢
May 202612.3¢18.4¢
Apr 202612.7¢18.9¢
Mar 202613.0¢18.6¢
Feb 202612.6¢17.6¢
Jan 202612.1¢17.4¢
Dec 202511.9¢17.1¢
Nov 202512.3¢17.8¢
Oct 202512.5¢17.9¢
Sep 202512.5¢18.1¢

Source: U.S. Energy Information Administration (Aug 2026). Retrieved November 5, 2026. About our data

What common appliances cost to run in Idaho

Worked examples at 13.37¢/kWh, the August 2026 average:

  • Running a 1,500 W space heater 6 hours a day for 30 days uses 270 kWh and costs about $36.10.
  • Running a 3,500 W central air conditioner 8 hours a day for 30 days uses 840 kWh and costs about $112.31.
  • Running a refrigerator using 500 kWh per year uses 500 kWh and costs about $66.85 a year.

Try your own appliance in the appliance cost calculator.

Typical monthly use and bill

Idaho residential customers used an average of 933 kWh a month in 2025 (EIA annual data). At 13.37¢/kWh, that works out to about $124.74 a month.

States with similar prices

Compare all 50 states and DC

Frequently asked questions

Is electricity expensive in Idaho?

Idaho ranked 47th most expensive of 51 (50 states and DC) in August 2026, at 13.37¢/kWh versus the U.S. average of 18.16¢/kWh.

How have Idaho electricity prices changed over the past year?

The average residential price rose from 12.08¢/kWh in August 2025 to 13.37¢/kWh in August 2026, a change of +10.7%.

What is a typical electric bill in Idaho?

Residential customers in Idaho used an average of 933 kWh a month in 2025. At 13.37¢/kWh that is about $124.74 a month. Use the electric bill calculator for your own usage.

Why might my Idaho rate differ from this average?

The state average blends every utility, rate plan and fixed charge in the state. Utilities, co-ops and municipal providers set different tariffs, and time-of-use or tiered plans change the price of each kWh. Divide your bill total by your kWh for your own average rate.

Data last updated: