Idaho Income Tax Calculator
Use this free income tax calculator customized with Idaho-specific tax rates, costs, and financial data.
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Frequently Asked Questions
What is the Idaho state income tax rate?
Idaho has a top marginal income tax rate of 5.8%. The state uses a flat tax rate on all taxable income.
Does Idaho have a flat or progressive income tax?
Idaho uses a flat income tax rate of 5.8% on all taxable income.
How do I file my Idaho state income tax return?
Idaho residents must file a state income tax return with the Idaho Department of Revenue (or equivalent agency). Most taxpayers can file electronically. The deadline typically aligns with the federal tax deadline of April 15.