Colorado Tax Authority
Official Colorado state tax information, forms, and filing resources.
Source: Colorado Department of RevenuewebpageApplies to: 2025
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Colorado Income Tax
Colorado uses a flat income tax rate applied to all taxable income. Combined with federal tax, this determines your total income tax burden.
Income Tax Brackets
The U.S. federal income tax uses seven progressive brackets with rates from 10% to 37%. Each bracket rate only applies to the income within that range — not to your entire income.
Last reviewed: 2027-01-15 • State: CO