State Tax

Colorado Tax Calculator 2026 Flat 4.4% Rate

Colorado taxes income at a single flat rate of 4.4%, regardless of how much you earn. That makes the state-tax side of the math simple — the harder part is usually the federal side, which is why this page runs both together: enter your numbers once and see your combined federal + Colorado tax, with 2025 vs. 2026 vs. 2027 shown side by side.

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Colorado state tax: Flat 4.4% Rate. Enter your details below to see your combined federal + Colorado tax, including the state bracket breakdown.

Federal + Colorado State Tax Calculator

Filing Status

Annual Wages ($)

Other Income ($)

Long-Term Capital Gains ($)

Qualifying Children

Federal Tax Withheld ($)

I have self-employment income

Deduction Type

Itemized Amount ($)

Tax Year

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This calculator uses the same engine as the main US Tax Calculator — see our Methodology page for exactly where every figure comes from, and our Disclaimer for what this tool does not model (AMT, NIIT, EITC, local taxes, and more).

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