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Everyday money · CO

Colorado Income Tax Calculator

Estimate your 2025 combined federal and Colorado income tax — Colorado adds a flat 4.4% state income tax.

InputsTY-2025
$
$
$
Federal + state tax17.2% effective
$17,156/yr
10% on $11,925$1,193
12% on $36,550$4,386
22% on $35,775$7,871
federal tax subtotal$13,449
CO state tax$3,707
taxable income
$84,250
marginal rate
22.0%
after tax
$82,844

Income tax in Colorado

Colorado taxes income at a flat 4.4% for tax year 2025, applied to federal taxable income — so the federal standard deduction is already built into the base before the state rate applies. The rate was temporarily cut to 4.25% for 2024 under the TABOR surplus mechanism, but the 2025 surplus fell just under the trigger, so the full 4.4% statutory rate applies for 2025. Capital gains are taxed as ordinary income.

Common questions

What is the Colorado state income tax rate?
Colorado has a flat 4.4% income tax that applies on top of federal tax.
Does Colorado tax capital gains?
Yes — Colorado taxes capital gains as ordinary income at the same rate as your wages.

How we calculate this

Federal brackets per our income-tax methodology, plus 2025 Colorado state tax. Estimates only — not tax advice.

Tax Foundation: 2025 state income tax rates →Colorado Dept. of Revenue →
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Estimates for general informational purposes only; not tax advice. Colorado figures are simplified (credits, local taxes, and AGI adjustments vary) and should be verified with the state Department of Revenue.