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INCOME TAXES:
 9 Months Ended
Sep. 30, 2026
Income Tax Disclosure [Abstract]  
Income Taxes INCOME TAXES
 
In accordance with interim reporting requirements, IDACORP and Idaho Power use an estimated annual effective tax rate for computing their provisions for income taxes. An estimate of annual income tax expense (or benefit) is made each interim period using estimates for annual pre-tax income, income tax adjustments, and tax credits. The estimated annual effective tax rates do not include discrete events such as tax law changes, examination settlements, accounting method changes, or adjustments to tax expense or benefits attributable to prior years. Discrete events are recorded in the interim period in which they occur or become known. The estimated annual effective tax rate is applied to year-to-date pre-tax income to determine income tax expense (or benefit) for the interim period consistent with the annual estimate. In subsequent interim periods, income tax expense (or benefit) for the period is computed as the difference between the year-to-date amount reported for the previous interim period and the current period's year-to-date amount.

Income Tax Expense

The following table provides a summary of income tax expense (benefit) (in thousands of dollars): 
IDACORPIdaho Power
Nine months ended
September 30,		Nine months ended
September 30,
2026202520262025
Income tax at statutory rates (federal and state)$87,206 $67,179 $86,349 $65,335 
Excess deferred income tax reversal(4,872)(7,293)(4,872)(7,293)
Income tax return adjustments(13,503)(8,046)(13,728)(8,581)
Other(1)
(44,933)(24,300)(42,572)(22,545)
Income tax expense before ADITC$23,898 $27,540 $25,177 $26,916 
Additional ADITC amortization(6,250)(39,000)(6,250)(39,000)
Income tax expense (benefit)$17,648 $(11,460)$18,927 $(12,084)
Effective tax rate5.1 %(4.3)%5.5 %(4.6)%
(1) "Other" primarily consists of the net tax effect of Idaho Power's regulatory flow-through tax adjustments.
Supplemental Disclosure of Cash Flow Information

Supplemental cash flow information related to income taxes, including cash (refunded) paid for income taxes and cash received from IDACORP related to income taxes, is presented below (in thousands of dollars):
Nine months ended
September 30,
20262025
IDACORP
Total cash (refunded) paid for income taxes$(3,374)$5,790 
Idaho Power
Total cash received from IDACORP related to income taxes$(2,443)$(21,600)