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Colorado Income Tax Calculator 2026

Estimate your Colorado federal and state income tax for 2025.

Your inputs

$

Your liability

Total tax
$14,281
After tax: $70,719
Federal tax
$10,541
Taxable: $70,400
State tax
$3,740
Taxable: $85,000
Effective rate
16.8%
Federal marginal
22.0%
Federal bracket breakdown
10.00%on $11,600$1,160
12.00%on $35,550$4,266
22.00%on $23,250$5,115

About Colorado income tax

Tax structure

Colorado uses a flat tax rate of 4.40% on taxable income. Colorado uses a flat 4.4% rate based on federal taxable income.

Snapshot at $75,000 (single)

  • Take-home: $57,622 per year
  • Federal tax: $8,341
  • State tax: $3,300
  • Effective rate: 23.17%
  • vs. Texas (no income tax): Colorado keeps $3,300 more.

Compare to neighboring states

Wyoming →Nebraska →Kansas →Oklahoma →All states

Colorado tax FAQ

How much state income tax will I pay in Colorado?

Colorado state income tax depends on your taxable income and filing status. Use the calculator above for an exact estimate. Colorado uses a flat 4.4% rate based on federal taxable income.

What's the difference between federal and Colorado state tax?

Federal income tax is collected by the IRS using nationwide brackets (10%–37%). Colorado state income tax (where applicable) is separate and uses its own brackets and deductions. Both apply to most Colorado residents.

Are these the 2025 or 2026 tax brackets?

The calculator uses tax year 2025 federal brackets — the figures you'll use to file in early 2026. The IRS adjusts brackets annually for inflation; we update when 2026 figures are released.

Should I take the standard deduction or itemize?

Take whichever is larger. The 2025 standard deduction is $14,600 (single), $29,200 (married filing jointly), or $21,900 (head of household). Itemize if your mortgage interest, state and local taxes (capped at $10,000), and charitable donations exceed that amount.