Tax Calculator Colorado
Calculate combined federal + Colorado state income tax with deductions, filing status, and SALT itemization. Updated for 2026.
Colorado state tax applied. Colorado has a flat 4.4% state income tax (reduced from 4.55%). Rate set by TABOR formula. Federal taxable income used as the base (with some adjustments).
Deductions you can claim
Total tax owed
$13,962
Effective rate 16.43% · Marginal 22.0%
Taxable income
$70,000
Take-home
$71,038
Federal + Colorado combined
Federal: $10,222 · Colorado: $3,740
Full breakdown
Step-by-step from gross income to total tax owed.
| Gross income | $85,000 |
| Standard deduction | $15,000 |
| Taxable income | $70,000 |
| Federal income tax | $10,222 |
| Colorado state tax Flat 4.40% rate | $3,740 |
| Total tax | $13,962 |
| Take-home (post-tax only) | $71,038 |
Colorado state tax at a glance
Colorado has a flat 4.4% state income tax (reduced from 4.55%). Rate set by TABOR formula. Federal taxable income used as the base (with some adjustments).
Colorado flat tax rate
| Taxable income | Rate |
|---|---|
| $0 – above | 4.40% |
Compare with other states
Related United States calculators
Frequently Asked Questions
What is Colorado's flat tax rate?▾
Colorado charges a flat 4.40% state income tax on all taxable income, regardless of income level. Colorado has a flat 4.4% state income tax (reduced from 4.55%). Rate set by TABOR formula. Federal taxable income used as the base (with some adjustments).
How does Colorado tax interact with federal tax?▾
Federal income tax is calculated on your full taxable income using IRS brackets and the federal standard deduction. Colorado tax is calculated separately using Colorado's own brackets and standard deduction. You can deduct up to $10,000 of state and local taxes (SALT) on your federal Schedule A — but only if you itemize.
Does this calculator include city/local taxes?▾
No local or city taxes are calculated. Most Colorado residents don't have local income tax to worry about, but check your specific city — some have payroll, occupation, or wage taxes.
How do I become a Colorado resident for tax purposes?▾
Generally you need to (1) be physically present in Colorado for more than half the year, (2) have your "domicile" (permanent home) in Colorado, and (3) file a state tax return as a Colorado resident if required. States like California and New York are notably aggressive about claiming residency — moving requires careful documentation: change driver's license, voter registration, primary residence, bank accounts, and minimize ties to your former state.
What if I work in one state but live in another?▾
You generally pay state tax to the state where you EARN the income. Many states have reciprocity agreements with neighbors so you only pay your home state. Others require you to file in both and credit the tax paid elsewhere. Remote workers should pay particular attention — some states (NY, CA) tax remote workers of in-state companies regardless of where they live.