Tools · State Income Tax
Colorado Income Tax Calculator (2026)
Estimate your Colorado state income tax for 2026. Enter your taxable income and filing status to see what Colorado taxes and your effective state rate, broken out line by line.
Colorado state income tax calculator
- Taxable income entered
- $75,000
- Colorado standard deduction
- −$16,100
- Income taxed by Colorado
- $58,900
- Colorado income tax
- $2,592
Colorado taxes income at a flat 4.40% for 2026. It has no state standard deduction of its own; taxable income starts from the federal amount, so the federal standard deduction effectively carries over.
Note on 2026 figures: The permanent rate is 4.40%. Under the TABOR surplus mechanism, a small temporary cut (to roughly 4.36%) is possible for 2026 if state revenue exceeds the cap, but that reduction is not certified until the surplus is finalized. The 4.40% permanent rate is used here.
State figures: Colorado Department of Revenue.
Estimate for 2026 state income tax only, based on annual tax brackets — it excludes federal income tax, Social Security and Medicare, local taxes, and any credits. This is general information, not tax advice.
How Colorado income tax is figured
Colorado applies a single flat rate to your taxable income (after any state deduction or exemption). Colorado taxes income at a flat 4.40% for 2026. It has no state standard deduction of its own; taxable income starts from the federal amount, so the federal standard deduction effectively carries over.
This estimate covers state income tax only. It does not include federal income tax, Social Security and Medicare, or tax credits. It is an annual-bracket estimate, not your final return. This is general information, not tax advice.
Income tax calculators for other states
Same 2026 engine, each with its own state rules.