States › Idaho › Idaho Power Co
investor-owned utility · EIA utility 9191
Idaho Power Co
Average price is revenue divided by sales for the sector and year; it is not a tariff rate. Reliability figures are as reported by utilities to EIA on Form 861 and may use different calculation methods. Annual figures: Form EIA-861 for 2024, final release. Monthly state figures run to July 2026.
In its Form EIA-861 filing for 2024, Idaho Power Co, an investor-owned utility, reported 539,849 residential customers in Idaho and 1 other state, with a service territory that touches 29 counties.
Its average residential price that year was 11.74¢ per kilowatthour, about the same as the Idaho average of 11.52¢ and 29% below the US average of 16.48¢. The figure is residential revenue divided by residential sales, so it folds in fixed charges, riders and every rate schedule the utility bills under.
That works out to an average residential bill of $108.12 a month on average use of 921 kWh a month. Across Idaho the average bill was $108.73 on 944 kWh, so a bill gap reflects how much power households use as well as what each kilowatthour costs.
For reliability it reported a SAIDI of 216.0 minutes per customer with major event days included and 172.5 minutes with them excluded, calculated under IEEE 1366 standard. The median among Idaho utilities reporting was 198.9 minutes with major event days; this utility's figure is 8.6% above that median.
The average price is up 17.2% on 2019, against up 16.5% for Idaho as a whole, and little changed on 2023. EIA's early release for 2025, which has not been fully edited, shows 11.78¢.
Compared with Idaho, the US and other investor-owned utilities
| Measure, 2024 | This utility | Investor-owned utilities, US median | Idaho | United States |
|---|---|---|---|---|
| Average residential price per kWh | 11.74¢ | 16.17¢ | 11.52¢ | 16.48¢ |
| Average monthly residential bill | $108.12 | $131.47 | $108.73 | $142.26 |
| Average monthly use, kWh | 921 | 787 | 944 | 863 |
| Residential price change, 1 year | +0.9% | — | +4.3% | +3.0% |
| Residential price change, 5 years | +17.2% | — | +16.5% | +26.7% |
| SAIDI, all events (minutes) | 216.0 | 278.7 | 198.9 median | 184.5 median |
| SAIDI, without major event days | 172.5 | 106.5 | 129.4 median | 99.8 median |
State and US prices, bills and use are EIA's own averages over every customer. The ownership column and the reliability columns are medians across utilities with at least 1,000 residential customers, computed on this site from the final 2024 file. Among the 3 filings by investor-owned utilities in Idaho, the median price was 11.76¢. In Idaho this utility's price ranks 3 of 12, counting from the highest.
Average price by year
Idaho Power CoIdaho averageUS average
Year by year
| Year | ¢ per kWh | Idaho ¢ | Monthly bill | kWh a month | Residential customers | All sales |
|---|---|---|---|---|---|---|
| 2025 early release | 11.78¢ | 11.82¢ | $106.48 | 904 | 554,211 | 16.2 TWh |
| 2024 | 11.74¢ | 11.52¢ | $108.12 | 921 | 539,849 | 16 TWh |
| 2023 | 11.63¢ | 11.05¢ | $109.13 | 938 | 524,248 | 15.5 TWh |
| 2022 | 10.69¢ | 10.37¢ | $105.17 | 984 | 512,803 | 15.8 TWh |
| 2021 | 10.36¢ | 10.16¢ | $97.61 | 942 | 499,217 | 15.4 TWh |
| 2020 | 10.05¢ | 9.95¢ | $94.41 | 940 | 484,432 | 14.8 TWh |
| 2019 | 10.02¢ | 9.89¢ | $93.46 | 932 | 471,298 | 14.5 TWh |
| 2018 | 10.38¢ | 10.15¢ | $96.75 | 932 | 459,128 | 14.6 TWh |
| 2017 | 10.32¢ | 10.04¢ | $102.56 | 994 | 448,799 | 14.6 TWh |
| 2016 | 10.29¢ | 9.95¢ | $97.45 | 947 | 440,362 | 14.2 TWh |
| 2015 | 10.29¢ | 9.93¢ | $98.72 | 959 | 432,275 | 14.3 TWh |
| 2014 | 10.07¢ | 9.72¢ | $98.07 | 973 | 425,036 | 14.1 TWh |
| 2013 | 9.58¢ | 9.32¢ | $102.24 | 1,067 | 418,892 | 14.6 TWh |
Bundled residential service only in the price, bill and use columns. Bill = residential revenue ÷ customers ÷ 12; use = residential sales ÷ customers ÷ 12. EIA describes its early release as not fully edited; it is shown for this utility alone and enters no average, median or rank on this site.
Month by month
Idaho Power Co (ID)Idaho average
Sales by sector, 2024
| Sector | Customers | Sales | Share of sales | Revenue | ¢ per kWh, bundled |
|---|---|---|---|---|---|
| Residential | 539,849 | 6 TWh | 37% | $700,402,000 | 11.74¢ |
| Commercial | 79,101 | 4.3 TWh | 27% | $397,289,800 | 9.17¢ |
| Industrial | 22,617 | 5.7 TWh | 36% | $463,557,700 | 8.17¢ |
Customers, sales and revenue count every service type the utility reported (bundled, energy-only and delivery-only). The price column uses bundled service alone, because part-bill revenue would understate it. Sources of energy: 19.9 TWh in total, of which 67.8% was its own net generation and 6.6 TWh was bought wholesale; summer peak demand 3,793 MW.
By state
| State | Residential customers | ¢ per kWh | State average ¢ | Monthly bill | SAIDI, all events |
|---|---|---|---|---|---|
| Idaho | 525,751 | 11.76¢ | 11.52¢ | $107.68 | 206.5 |
| Oregon | 14,098 | 11.29¢ | 14.70¢ | $124.44 | 509.9 |
Reliability
Minutes of sustained interruption per customer in 2024, as the utility reported them under IEEE 1366 standard. SAIFI: 1.41 interruptions per customer with major event days, 1.25 without; CAIDI 153.4 minutes per interruption. EIA's Idaho total across all reporting utilities was 232.8 minutes with major event days and 174.0 without. Major event days are storms and similar events that a utility's chosen method sets apart; methods differ, so treat comparisons as approximate. What SAIDI and SAIFI mean.
| Year | SAIDI, all events | SAIDI, no major events | SAIFI, all events | SAIFI, no major events | Method |
|---|---|---|---|---|---|
| 2025 early release | 174.1 | 145.1 | 1.04 | 0.98 | IEEE 1366 |
| 2024 | 216.0 | 172.5 | 1.41 | 1.25 | IEEE 1366 |
| 2023 | 131.8 | 121.1 | 1.08 | 1.01 | IEEE 1366 |
| 2022 | 151.7 | 150.9 | 1.16 | 1.16 | IEEE 1366 |
| 2021 | 162.6 | 122.3 | 1.36 | 1.10 | IEEE 1366 |
| 2020 | 209.0 | 160.6 | 1.22 | 1.08 | IEEE 1366 |
| 2019 | 143.2 | 119.9 | 1.22 | 1.13 | IEEE 1366 |
| 2018 | 129.4 | 122.5 | 1.07 | 1.06 | IEEE 1366 |
| 2017 | 233.5 | 210.3 | 1.52 | 1.47 | IEEE 1366 |
| 2016 | 159.9 | 159.9 | 1.18 | 1.18 | IEEE 1366 |
| 2015 | 213.9 | 172.8 | 1.58 | 1.38 | IEEE 1366 |
| 2014 | 153.6 | 129.4 | 1.21 | 1.10 | IEEE 1366 |
| 2013 | 188.7 | 149.8 | 1.40 | 1.30 | IEEE 1366 |
Generation at plants it operates, 2025
- Hydro 65.6% 7 TWh
- Natural gas 34.4% 3.7 TWh
Net generation of 10.7 TWh at power plants this utility operates, from Form EIA-923. It is not the mix delivered to customers: utilities also buy power wholesale (6.6 TWh in 2024), sell generation to others and may co-own plants that another company operates.
Counties in its service territory
- Ada County ID
- Adams County ID
- Bannock County ID
- Bingham County ID
- Blaine County ID
- Boise County ID
- Camas County ID
- Canyon County ID
- Cassia County ID
- Elmore County ID
- Gem County ID
- Gooding County ID
- Idaho County ID
- Jerome County ID
- Lemhi County ID
- Lincoln County ID
- Minidoka County ID
- Oneida County ID
- Owyhee County ID
- Payette County ID
- Power County ID
- Twin Falls County ID
- Valley County ID
- Washington County ID
- Baker County OR
- Grant County OR
- Harney County OR
- Malheur County OR
- Wallowa County OR
Counties the utility listed on Form EIA-861 for 2024. Listing a county does not mean the utility serves all of it.
Other utilities in Idaho
| Utility | Ownership | Residential customers | ¢ per kWh | Monthly bill | SAIDI, all events | SAIDI, no major events |
|---|---|---|---|---|---|---|
| Kootenai Electric Cooperative | Cooperative | 30,470 | 12.20¢ | $138.30 | 186.8 | 125.0 |
| City of Idaho Falls | Municipal | 28,142 | 9.25¢ | $87.99 | 72.4 | 72.4 |
| Northern Lights, Inc | Cooperative | 22,510 | 11.67¢ | $126.23 | 1,385.2 | 1,048.1 |
| Fall River Rural Elec Coop Inc | Cooperative | 17,282 | 11.08¢ | $130.11 | 9.5 | 7.0 |
| United Electric Co-op, Inc | Cooperative | 5,100 | 7.89¢ | $129.95 | 49.7 | 40.3 |
| Salmon River Electric Coop Inc | Cooperative | 2,383 | 9.00¢ | $119.32 | 198.9 | 198.9 |
All Idaho utilities · Investor-owned utilities nationwide
Questions and answers
How much does electricity cost from Idaho Power Co?
Residential customers paid an average of 11.74¢ per kilowatthour in 2024. EIA derives this by dividing residential revenue by residential sales; it is an average across all rate schedules and charges, not a tariff rate.
How does that compare with Idaho?
The Idaho average residential price in 2024 was 11.52¢ and the US average 16.48¢; Idaho Power Co was about the same as the state figure. Among 12 utility filings with a bundled residential price in Idaho, it had the 3rd highest.
What is the average Idaho Power Co bill?
$108.12 a month in 2024, on average residential use of 921 kWh a month (annual revenue and sales divided by customers and by twelve). The Idaho average was $108.73 on 944 kWh.
How reliable is Idaho Power Co service?
It reported 216.0 minutes of interruption per customer (SAIDI) including major event days and 172.5 minutes excluding them, with 1.41 interruptions per customer (SAIFI) in 2024. Utilities calculate these under differing methods, so comparisons are approximate.
Is the Idaho Power Co price rising?
The average residential price was little changed in 2024 compared with 2023 and up 17.2% compared with 2019. EIA's early, not fully edited release for 2025 shows 11.78¢.
Which counties does Idaho Power Co serve?
Its Form EIA-861 service territory lists 29 counties, including Ada County, ID, Adams County, ID, Bannock County, ID, Bingham County, ID, Blaine County, ID and Boise County, ID. A county can appear in several utilities' territories.
Provenance
Source: U.S. Energy Information Administration. Annual figures are from Form EIA-861 (sales to ultimate customers, reliability, operational data and service territory files), final release for 2024, respondent "Idaho Power Co", utility number 9191; the 2025 row is from EIA's early release. Monthly utility figures are from the Form EIA-861M sample. State and US averages are from the Form EIA-861M sales and revenue workbook, published through July 2026. Generation by fuel is from Form EIA-923, 2025 final. All are US government works in the public domain. Page built 1 Oct 2026. Errors in processing are corrected at the next build; see corrections. For tariffs and rate schedules, consult the utility or the state utility commission.