Idaho Electricity Rates and Average Bill
Data through June 2026 (the latest month EIA has published) · Updated September 04, 2026
As of June 2026, the average residential electricity rate in Idaho is 14.37¢/kWh (the 10th-lowest in the U.S.) and the average monthly bill is $114.05, per EIA data. That rate is 4.0¢ below the U.S. average of 18.34¢/kWh.
Rate trend, last three years
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| July 2025 | 12.28 | 129.98 | 1058 |
| August 2025 | 12.08 | 119.81 | 992 |
| September 2025 | 12.50 | 98.32 | 787 |
| October 2025 | 12.46 | 91.79 | 737 |
| November 2025 | 12.25 | 105.27 | 859 |
| December 2025 | 11.87 | 125.84 | 1060 |
| January 2026 | 12.07 | 142.79 | 1183 |
| February 2026 | 12.63 | 119.27 | 944 |
| March 2026 | 13.01 | 112.60 | 866 |
| April 2026 | 12.70 | 96.82 | 763 |
| May 2026 | 12.35 | 92.13 | 746 |
| June 2026 | 14.37 | 114.05 | 794 |
Idaho vs the U.S. average
| Idaho | U.S. average | |
|---|---|---|
| Rate (June 2026) | 14.37¢/kWh | 18.34¢/kWh |
| Average monthly bill | $114.05 | $170.65 |
| Average monthly usage | 794 kWh | 930 kWh |
| Rate change, 1 year | +19.1% | +5.0% |
| Rate change, 5 years | +44.7% | +32.6% |
Idaho's average residential rate of 14.37¢/kWh for June 2026 ranks 10th of 51 (1 = lowest). Over the past year the rate moved +19.1% (Idaho) versus +5.0% nationally; over five years, +44.7% versus +32.6% nationally. Average usage of 794 kWh/month compares with 930 kWh nationally, which is why the bill and rate ranks can differ. For how Idaho's recent increase ranks against every other state (12-month, 3-year and 5-year changes), see electricity rate increases by state.
Largest utilities in Idaho
Average effective rates and bills for Idaho's largest utilities, from EIA Form 861-M (June 2026). Or find yours by ZIP code.
| Utility | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) | Residential customers |
|---|---|---|---|---|
| Idaho Power Co | 14.86 | 120.07 | 808 | 552,837 |
| Avista Corp | 13.79 | 90.39 | 655 | 131,152 |
| PacifiCorp | 15.24 | 115.15 | 756 | 77,082 |
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 14.37¢/kWh is about $143.70. The state's actual average usage is 794 kWh/month, which is what produces the $114.05 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.