The average residential electricity rate in Idaho (ID) is $0.1050 per kWh as of April 2026, according to the US Energy Information Administration (EIA). This is far below the national average of $0.1805/kWh, ranking Idaho #4 out of 51 (all 50 states plus Washington DC), where #1 is the cheapest and #51 is the most expensive. The average Idaho household consumes 1,105 kWh per month, resulting in a monthly electric bill of approximately $116 and annual electricity costs of about $1,392.
Idaho has among the lowest electricity rates in the continental US thanks to abundant hydroelectric power.
This comprehensive guide covers Idaho electricity rates, historical trends, utility providers, bill calculation, solar savings potential, and actionable tips to reduce your electric bill. All rate data is sourced from the US EIA and updated monthly. Use our electricity cost calculator for personalized estimates.
Idaho residential electricity rates have increased 6% over the past six years. The table below shows the trajectory compared against the national average.
| Year | Idaho ($/kWh) | National Avg | Difference |
|---|---|---|---|
| 2020 | $0.0986 | $0.1322 | -25% |
| 2022 | $0.1020 | $0.1492 | -32% |
| 2024 | $0.1030 | $0.1680 | -39% |
| Apr 2026 | $0.1050 | $0.1805 | -42% |
Idaho has a regulated electricity market. The primary providers are: Idaho Power, Rocky Mountain Power, Avista.
Idaho generates electricity from: Hydroelectric 48%, Natural gas 24%, Wind 15%, Solar 8%, Coal 5%.
Your monthly electric bill = kWh Used × Rate per kWh. The average Idaho household uses 1,105 kWh/month.
Idaho Power generates nearly half its electricity from hydroelectric dams on the Snake River, providing some of the cheapest generation in the nation. Rates have been remarkably stable.
Universal strategies: adjust thermostat 2-3 degrees (saves 5-10% on HVAC), switch to LEDs (see our LED savings calculator), unplug phantom loads (saves $100-200/year), and run major appliances during off-peak hours if your utility offers time-of-use pricing. For larger investments, consider a heat pump, better insulation, or a smart thermostat.
Idaho receives 4.8 peak sun hours/day. A 6 kW system produces ~8,620 kWh/year, saving ~$905/year. With the 30% federal ITC, payback is typically 8-12 years. Use our solar panel calculator and solar ROI calculator for personalized estimates.
| State | Rate ($/kWh) | Avg Bill | Market |
|---|---|---|---|
| Idaho (ID) | $0.1050 | $116 | Regulated |
| Montana (MT) | $0.1228 | $118 | Regulated |
| Nevada (NV) | $0.1383 | $149 | Regulated |
| Oregon (OR) | $0.1218 | $117 | Regulated |
| Utah (UT) | $0.1098 | $99 | Regulated |
| Washington (WA) | $0.1038 | $111 | Regulated |
| Wyoming (WY) | $0.1128 | $117 | Regulated |
Data source: US Energy Information Administration (EIA), Electric Power Monthly, April 2026. Rates shown are average residential rates and may differ from your specific utility tariff. Solar estimates assume a 6 kW system with 82% efficiency factor. Always verify current rates with your utility provider.