Idaho Income Tax 2025
Per IRS inflation adjustments, Idaho (ID) has a flat income tax rate of 5.8% for 2025.
Idaho runs a low-rate income tax. The top marginal bracket sits in the bottom band of the U.S. state-tax distribution, and the effective rate paid by typical households is correspondingly modest. State revenue mixes income tax with sales and property taxes.
For households comparing Idaho against other states, the full picture combines income tax (modeled by the calculator) with state and local sales tax, property tax, and any state-specific tax preferences. The compare tool on this site runs a side-by-side total-burden estimate; the per-state pages cover the income-tax piece in detail.
2025 Tax Brackets, Single Filer
| Tax Rate | Taxable Income Range |
|---|---|
| 5.8% | $0+ |
Standard Deduction
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Use our income tax calculator to see your full federal + Idaho tax breakdown.
Open Income Tax CalculatorFrequently Asked Questions
Idaho (ID) has a flat income tax rate of 5.8% for tax year 2025.
The Idaho standard deduction for 2025 is $14,600 for single filers and $29,200 for married filing jointly.
Idaho is one of 41 states that levy a state income tax. 9 states have no state income tax at all. Use our calculators to compare your tax burden across states.
State tax treatment of retirement income varies. Check Idaho's specific rules for Social Security, pensions, and 401(k) withdrawals. Consult a tax professional for personalized guidance.
Tax brackets and rates for 2025. Not tax advice, consult a qualified tax professional for your specific situation.