Colorado Income Tax Calculator
Use this free income tax calculator customized with Colorado-specific tax rates, costs, and financial data.
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Frequently Asked Questions
What is the Colorado state income tax rate?
Colorado has a top marginal income tax rate of 4.4%. The state uses a flat tax rate on all taxable income.
Does Colorado have a flat or progressive income tax?
Colorado uses a flat income tax rate of 4.4% on all taxable income.
How do I file my Colorado state income tax return?
Colorado residents must file a state income tax return with the Colorado Department of Revenue (or equivalent agency). Most taxpayers can file electronically. The deadline typically aligns with the federal tax deadline of April 15.