Colorado Income Tax Calculator
Colorado income tax is calculated on your taxable income after deductions and exemptions. This calculator estimates your Colorado state income tax liability for the current tax year. Enter your annual gross income, choose your filing status (single, married filing jointly, married filing separately, or head of household), and add any pre-tax deductions to see your estimated state tax, effective tax rate, and marginal bracket. Results update in real time as you adjust your inputs. The calculator covers Colorado state income tax only; federal income tax, FICA payroll taxes, and any local income taxes your city or county imposes are separate. All rates and brackets are sourced directly from Colorado Department of Revenue and are verified for the current tax year. Use this tool alongside the federal income tax calculator to see your combined total tax liability. Effective rate and marginal rate are both shown so you can evaluate the impact of additional income, filing status changes, or increased pre-tax contributions to a 401(k) or similar plan.
Colorado applies a flat income tax rate of 4.4% to all taxable income. On a $60,000 salary (single filer) the state income tax is $1,997.60, an effective rate of 3.33%.
How Colorado income tax works
Colorado taxes all individual taxable income at a flat rate of 4.4%, effective for tax year 2024 and onward. The rate was reduced from 4.55% by Colorado HB 23-1375 (2023), which amended CRS §39-22-104. Colorado taxable income starts with federal taxable income and applies Colorado-specific additions and subtractions. The state conforms to the federal standard deduction and personal exemption amounts. Your result updates the page link, so you can copy a permalink to any calculation.
taxable income = gross income - standard deduction
state income tax = taxable income x flat rate / 100
effective rate = state income tax / gross income x 100
Colorado income tax: frequently asked questions
How much is the Colorado income tax on a $60,000 salary?
A single filer earning $60,000 a year in Colorado has a taxable income of $45,400.00 after the standard deduction. The computed state income tax is $1,997.60, an effective rate of 3.33%. Enter your own income above for an exact figure.
What is the Colorado state income tax rate?
Colorado applies a flat income tax rate of 4.4% to all taxable income, regardless of income level or filing status.
What filing statuses does Colorado income tax apply to?
Colorado income tax applies to single filers, married couples filing jointly, head of household filers and married couples filing separately. Bracket thresholds and standard deductions may differ by filing status.
What is Colorado's income tax rate?
Colorado taxes all individual taxable income at a flat rate of 4.4% for tax year 2024 and later. This rate was reduced from 4.55% by HB 23-1375, signed into law in 2023, which amended CRS §39-22-104. All filing statuses pay the same flat rate on all taxable income.
Does Colorado have a standard deduction?
Colorado conforms to the federal standard deduction. For tax year 2024, the deduction is $14,600 for single filers and married filing separately, $29,200 for married filing jointly, and $21,900 for head of household. In addition, qualifying lower-income taxpayers may claim a Personal Exemption Credit of $101 per exemption for 2024.
What is the Colorado TABOR refund and how does it affect taxes?
The Taxpayer's Bill of Rights (TABOR), added to the Colorado Constitution in 1992, limits the growth of state revenue and spending. When state revenues exceed the TABOR cap, the surplus must be refunded to taxpayers. Refunds are typically issued as temporary income tax rate reductions or direct rebates. The 4.4% flat rate itself is the standard rate; any TABOR refund mechanism operates separately.
What other major taxes does Colorado impose?
Colorado levies a statewide sales and use tax of 2.9%. Local jurisdictions (cities, counties, and special districts) add their own rates, with most combined rates falling between 6% and 10%. Colorado also imposes a corporate income tax at 4.4% and various excise taxes on fuel, tobacco, and marijuana.
Official sources
- Colorado income tax rates (tax year 2025): Colorado Department of Revenue, as at Jun 12, 2026.
Reviewed by the CalculatorHub team, edited by James Graham, 11 June 2026. See our methodology. General information, not financial or tax advice.