Idaho State Tax Calculator 2026
Estimate your Idaho state income tax and take-home pay for tax year 2026.
Last updated: November 2025 · Source
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Idaho 2026 tax overview
Flat 5.3% effective TY2025 under HB40; conforms to federal std deduction.
Breakdown
Idaho income tax brackets, 2026
Idaho charges one rate on all taxable income. Figures are for single filers unless the state uses one schedule for all statuses.
| Taxable income | Rate | Tax on this bracket |
|---|---|---|
| Over $0 | 5.30% | 5.30% of everything above $0 |
Idaho conforms to the federal standard deduction: $16,100 single, $32,200 married filing jointly for 2026.
Frequently Asked Questions
What are the 2026 Idaho income tax rates?
Idaho charges a flat 5.30% on taxable income for 2026. Flat 5.3% effective TY2025 under HB40; conforms to federal std deduction.
At what income does the top Idaho tax rate start?
Idaho has a single rate, so it applies from the first dollar of taxable income above the standard deduction. There is no higher bracket to reach.
What is the 2026 Idaho standard deduction?
Idaho conforms to the federal standard deduction, which is $16,100 single and $32,200 married filing jointly for 2026 under IRS Rev. Proc. 2025-32.
Does Idaho tax Social Security and retirement income?
Idaho does not tax Social Security and offers a limited retirement benefits deduction for filers 65 and over, or 62 and disabled, that applies mainly to government pensions.
What surprises people most about Idaho income tax?
Idaho moved to a flat rate in 2023 and has cut it in most years since.