11.78¢
per kWh, 2025
[ Idaho Power / ID · IPC-E-25-16 ]
Idaho Power: 9.7% approved for 540,032 Idaho homes
EFFECTIVE · ON BILLS JAN 2026
rate increase approved
12.93¢
per kWh with the increase
540,032
residential customers
+16.9%
since 2020
What your bill becomes
Bill today
After the increase
Difference / month · / year
Estimated at Idaho Power's average effective residential rate (11.78¢/kWh, EIA, all charges included). Your tariff, fees and taxes differ.
Rate case IPC-E-25-16
In effect Docket IPC-E-25-16 ↗
- May 2025Filed with the commission as docket IPC-E-25-16
- Dec 2025Commission approved 9.74% (asked: 17.35%)
- Jan 2026New rates on bills
Idaho Power asked the Idaho Public Utilities Commission on May 30, 2025 for $199.1 million in new annual revenue, a 13.09% overall increase that the company said meant a 17.35% rise in residential billed revenue (about $21.66 a month at 900 kWh). The company cited rapid customer growth, about $1 billion of 2025 infrastructure spending, battery storage, grid upgrades and wildfire-mitigation costs. A settlement filed October 24, 2025 cut the increase to about $110 million (7.48% overall, 9.74% for residential customers), and the commission approved it on December 30, 2025 in Order No. 36892. New rates took effect January 1, 2026, adding about $12.13 a month for a residential customer using 900 kWh, with the $15 monthly service charge unchanged.
Rate history 2015–2025
| Year | ¢/kWh | Change | Customers |
|---|---|---|---|
| 2015 | 10.30¢ | — | 418,906 |
| 2016 | 10.30¢ | +0.0% | 426,966 |
| 2017 | 10.33¢ | +0.3% | 435,376 |
| 2018 | 10.39¢ | +0.6% | 445,693 |
| 2019 | 10.04¢ | −3.4% | 457,755 |
| 2020 | 10.08¢ | +0.4% | 470,804 |
| 2021 | 10.39¢ | +3.1% | 485,475 |
| 2022 | 10.70¢ | +3.0% | 498,920 |
| 2023 | 11.65¢ | +8.9% | 510,236 |
| 2024 | 11.76¢ | +0.9% | 525,751 |
| 2025 | 11.78¢ | +0.2% | 540,032 |
How this compares
11.83¢
Idaho average, 2025
−0.4%
Idaho Power vs ID 2025 average
−31.6%
vs US 2025 average
#5
priciest in ID
Idaho Power files with the EIA as Idaho Power Co (utility ID 9191).
Serves 24 counties in Idaho: Ada, Adams, Bannock, Bingham, Blaine, Boise, Camas, Canyon, Cassia, Elmore, Gem, Gooding, Idaho, Jerome, Lemhi, Lincoln, Minidoka, Oneida, Owyhee, Payette, Power, Twin Falls, Valley, Washington. 164 ZIP codes.
What the numbers show
Since 2015, Idaho Power's average residential rate has gone from 10.30¢ to 11.78¢ per kWh: +14.4% over 10 years, or about +1.4% a year. It rose in 8 of the 10 years we can compare, and the biggest one-year increase was +8.9% in 2023. The largest drop was −3.4% in 2019.
For a home using 933 kWh a month, the Idaho average, Idaho Power's 2025 rate works out to about $1,319 a year, about the same as the same home would pay at Idaho's average rate of 11.83¢. Of the 13 Idaho utilities in our data with a 2025 price, it is the 5th most expensive.
Idaho Power served 418,906 homes in 2015 and 540,032 in 2025 (+28.9%), about 59% of Idaho's residential electricity customers.
Who sets Idaho Power's rates
Idaho Power is investor-owned, so it can change its base rates only by filing a rate case with the Idaho Public Utilities Commission. The commission holds hearings and takes public comment before it rules, and it usually approves less than the company asks for. Fuel and other pass-through charges can change between rate cases.
Commission contact: Idaho Public Utilities Commission. How we calculate every figure on this page: methodology.
Questions
Did Idaho Power get a rate increase?
Yes. The Idaho Public Utilities Commission approved 9.74% in docket IPC-E-25-16 in Dec 2025, with new rates on bills from Jan 2026. The company had asked for 17.35%.
What does Idaho Power charge per kWh?
Idaho Power's average effective residential rate was 11.78¢ per kWh in 2025 (EIA-861, revenue divided by sales, all charges included). Idaho's 2025 average was 11.83¢.
How much have Idaho Power rates gone up in five years?
+16.9% between 2020 and 2025, against +32.1% for Idaho as a whole over the latest five-year window.
How many customers does Idaho Power have in Idaho?
540,032 residential customers in 2025, across 24 counties including Ada, Adams, Bannock, according to the EIA-861 survey.
Where do these numbers come from?
Rates and customer counts are from the US Energy Information Administration's annual EIA-861 survey; rate-case facts are from the Idaho Public Utilities Commission docket linked on this page. Nothing here is a utility bill; use it to understand the direction and size of changes.
Sources
Last verified 2026-10-16
- Idaho Public Utilities Commission: news release on Order No. 36892 approving the settlement (Dec. 30, 2025) checked 2026-10-16
- Idaho Public Utilities Commission: Notice of Application, Order No. 36638 (Case IPC-E-25-16) checked 2026-10-16
- Idaho Public Utilities Commission: Final Order No. 36892 (Dec. 30, 2025) checked 2026-10-16
- Idaho Power: Idaho Power Files General Rate Case (May 30, 2025 release with class table) checked 2026-10-16
- KIVI Idaho News 6: Idaho Power lowers rate hike proposal, now seeks $110 million increase checked 2026-10-16
- Boardroom Alpha: IDACORP Form 8-K on the approved settlement (Dec. 31, 2025) checked 2026-10-16
- EIA-861 Sales to Ultimate Customers, 2015–2025 (released 2026-10-07)
- EIA-861M monthly state averages through Jul 2026
- NREL utility-by-ZIP lookup (2024)