2026 Tax Tables
Idaho levies a flat 5.3% individual income tax. The withholding formula applies that rate only to wages above a tax-free threshold that embeds the standard deduction — $15,000 per year for single and head-of-household employees and $30,000 for married employees. Idaho’s ID W-4 also lets employees claim child tax credit allowances worth $3,868 each, which reduce wages before the rate is applied. Idaho has no local income tax.
Calculate IdahoWithholding →State Tax Rate
5.3% flat
State W-4 Form
Idaho ID W-4
Tax Year
2026
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Idaho uses a flat 5.3% individual income tax rate, applied to wages above a tax-free threshold.
Withholding begins above $15,000 of annual wages for single and head-of-household employees and $30,000 for married employees. These thresholds embed the standard deduction.
On the Idaho ID W-4, employees can claim child tax credit allowances worth $3,868 each. Each allowance reduces the wages subject to withholding.
No. Idaho does not impose city or county income taxes on wages.