This case is decided: Idaho Power's rate increase was cut from the requested 13.09 percent to an approved 7.48 percent, effective since January 1, 2026.
+$22a month
2026 power cost and fixed cost adjustment
On bills now Fuel cost adjustment before the Idaho Public Utilities Commission.
+$4a month
on a typical bill, as approved
As published, for a home using 900 kWh a month.
What happens next
The new rate took effect June 1, 2026 and is already on your bill. How rate cases work.
What it means for your bill
$
Fileddate not published
Hearingheld or waived
Decisiondecided
On billsJun 1, 2026
Idaho Power's annual power cost adjustment, combined with its fixed cost adjustment, raised bills by 3.15 percent, about 3.64 dollars a month for a typical residential customer using 900 kWh, effective June 1, 2026. The increase was driven by higher expected power costs from lower forecast hydropower generation due to low snowpack.
What it means for your bill: This annual fuel cost adjustment added about 3.64 dollars to your Idaho Power bill starting June 2026.
- Status
- On bills now
- Utility
- Idaho Power
- Commission
- Idaho Public Utilities Commission
- Approved
- 3.2% residential
- Typical bill change
- +$3.64 a month at 900 kWh
- On bills from
- June 1, 2026
- Last checked
- August 29, 2026
Common questions
How much will my Idaho Power bill go up?
Adds about $4 a month on a typical bill. As published, for a home using 900 kWh a month.
When would the new rates start?
They already did, on June 1, 2026.
When is the hearing?
No hearing date is on record for this case.
How do I comment?
The comment period closed once this case was decided; its result is above.
Sources
- Idaho Power Files Annual Power Cost Adjustment, Idaho Power, 2026-05-05
- Idaho Power seeks rate increases in annual cost adjustment filings, KMVT, 2026-05-05
Get an email when this changes
One email when a rate case is filed, gets a hearing date, or is decided for Idaho Power. Nothing else.
Unsubscribe with one click. We do not sell the list.