Idaho Electricity Rates and Average Bill
Data through August 2026 (the latest month EIA has published) · Updated October 31, 2026
As of August 2026, the average residential electricity rate in Idaho is 13.37¢/kWh (the 5th-lowest in the U.S.) and the average monthly bill is $137.11, per EIA data. That rate is 4.8¢ below the U.S. average of 18.16¢/kWh.
Rate trend, last three years
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| September 2025 | 12.50 | 98.36 | 787 |
| October 2025 | 12.46 | 91.83 | 737 |
| November 2025 | 12.25 | 105.31 | 860 |
| December 2025 | 11.88 | 125.92 | 1060 |
| January 2026 | 12.06 | 142.74 | 1183 |
| February 2026 | 12.63 | 119.23 | 944 |
| March 2026 | 13.00 | 112.57 | 866 |
| April 2026 | 12.70 | 96.82 | 763 |
| May 2026 | 12.35 | 92.14 | 746 |
| June 2026 | 14.37 | 114.05 | 794 |
| July 2026 | 13.73 | 152.66 | 1112 |
| August 2026 | 13.37 | 137.11 | 1026 |
Idaho vs the U.S. average
| Idaho | U.S. average | |
|---|---|---|
| Rate (August 2026) | 13.37¢/kWh | 18.16¢/kWh |
| Average monthly bill | $137.11 | $209.23 |
| Average monthly usage | 1026 kWh | 1152 kWh |
| Rate change, 1 year | +10.7% | +3.4% |
| Rate change, 5 years | +24.8% | +30.5% |
Idaho's average residential rate of 13.37¢/kWh for August 2026 ranks 5th of 51 (1 = lowest). Over the past year the rate moved +10.7% (Idaho) versus +3.4% nationally; over five years, +24.8% versus +30.5% nationally. Average usage of 1026 kWh/month compares with 1152 kWh nationally, which is why the bill and rate ranks can differ. For how Idaho's recent increase ranks against every other state (12-month, 3-year and 5-year changes), see electricity rate increases by state.
Largest utilities in Idaho
Average effective rates and bills for Idaho's largest utilities, from EIA Form 861-M (August 2026). Or find yours by ZIP code.
| Utility | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) | Residential customers |
|---|---|---|---|---|
| Idaho Power Co | 13.57 | 146.24 | 1,078 | 555,075 |
| Avista Corp | 13.19 | 113.79 | 862 | 131,568 |
| PacifiCorp | 14.87 | 126.68 | 852 | 77,382 |
Average bill = rate × average usage. Utilities with similar rates can show very different average bills because their customers' average usage differs (housing mix, heating fuel, climate).
Estimate a bill at Idaho rates
Worked example: 1,000 kWh at Idaho's average rate of 13.37¢/kWh is about $133.70. The state's actual average usage is 1026 kWh/month, which is what produces the $137.11 average bill. These are average effective rates including all charges; your utility's tariff will differ.
Wondering what's behind rising rates nationally? See Why is my electric bill so high?, our data-led explainer on demand growth, data centers, and grid costs. Also: Idaho gas prices and why they are what they are, and the cheapest way to heat a home by fuel and state.
Source: EIA retail sales data (residential sector, monthly), published with roughly a two-month lag. Rate = revenue ÷ sales; bill = revenue ÷ customers. We do not project unpublished months. See methodology.