Colorado Paycheck Calculator 2026
State
Colorado (CO)
Tax Type
Flat Rate Tax
State Tax Rate
Flat 4.40%
Colorado State Income Tax Overview
Colorado imposes a flat state income tax rate of 4.40% on all taxable income. This means every dollar of your taxable income is taxed at the same rate, regardless of how much you earn.
How Colorado Taxes Work in 2026
Colorado levies a flat state income tax rate of 4.40% on all taxable income. A flat tax means every taxpayer pays the same percentage, regardless of income level, which simplifies tax filing. Colorado offers a standard deduction of $15,000 for single filers and $30,000 for married filing jointly. This deduction reduces your taxable income before the 4.40% rate is applied. In addition to the 4.40% state income tax, Colorado residents also pay federal income tax (10% to 37% based on income) and FICA taxes (6.2% Social Security + 1.45% Medicare).
Colorado Flat Tax Rate
Colorado applies a flat income tax rate of 4.40% on all taxable income, regardless of filing status or income level.
Standard deduction: $15,000 (single) / $30,000 (married filing jointly)