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Everyday money · ID

Idaho Income Tax Calculator

Estimate your 2025 combined federal and Idaho income tax — Idaho adds progressive state income tax on top of federal.

InputsTY-2025
$
$
$
Federal + state tax17.7% effective
$17,667/yr
10% on $11,925$1,193
12% on $36,550$4,386
22% on $35,775$7,871
federal tax subtotal$13,449
ID state tax$4,218
taxable income
$84,250
marginal rate
22.0%
after tax
$82,333

Income tax in Idaho

Idaho cut its income tax rate from 5.695% to 5.3% for tax year 2025 via House Bill 40, made retroactive to January 1, 2025 — the largest income tax cut in state history. The tax is effectively flat: 5.3% applies to taxable income above a small zero-rate band ($4,673 single / $9,346 married filing jointly), after a standard deduction that mirrors the federal amounts. Capital gains are taxed as ordinary income.

Common questions

What is the Idaho state income tax rate?
Idaho has progressive state income tax brackets, applied on top of your federal tax.
Does Idaho tax capital gains?
Yes — Idaho taxes capital gains as ordinary income at the same rate as your wages.

How we calculate this

Federal brackets per our income-tax methodology, plus 2025 Idaho state tax. Estimates only — not tax advice.

Tax Foundation: 2025 state income tax rates →Idaho State Tax Commission →
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Estimates for general informational purposes only; not tax advice. Idaho figures are simplified (credits, local taxes, and AGI adjustments vary) and should be verified with the state Department of Revenue.