Colorado Income Tax Calculator
Figure basis: Official Colorado Department of RevenueColorado 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 $1,947.00, an effective rate of 3.25%.
How Colorado income tax works
Colorado taxes all individual taxable income at a single flat rate. Per the Colorado Department of Revenue Individual Income Tax Guide rate table, the rate is 4.4% for tax year 2025; for tax year 2024 only it was temporarily reduced to 4.25% under a TABOR surplus mechanism. The 4.4% statutory 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, so the state effectively conforms to the federal standard deduction. 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
The moving target inside Colorado's flat rate
Colorado applies a single flat rate to all taxable income, yet the exact number is less fixed than most flat taxes. The statutory rate is 4.4% for tax year 2025, reduced from 4.55% by HB 23-1375. For tax year 2024 only, a Taxpayer's Bill of Rights (TABOR) surplus mechanism temporarily dropped it to 4.25%, so anyone comparing two recent returns may see different rates for what looks like the same tax.
That variability flows straight from TABOR, added to the state constitution in 1992. When Colorado collects more than the constitutional cap allows, it must return the surplus, and one of the tools it uses is a temporary rate cut alongside direct rebates. For planning, treat 4.4% as the baseline and any lower figure in a given year as a possible one-off refund rather than a permanent reduction.
The base is worth understanding too. Colorado has no standard deduction of its own: it begins from federal taxable income, so the federal standard deduction ($15,750 single, $31,500 married filing jointly, $23,625 head of household for 2025) flows through automatically. High earners face one catch. Taxpayers with federal AGI above $300,000 must add back the portion of that deduction exceeding $12,000 (single) or $16,000 (joint), which quietly raises their Colorado taxable income.
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 $44,250.00 after the standard deduction. The computed state income tax is $1,947.00, an effective rate of 3.25%. 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 2025. Every filing status pays the same rate on all taxable income. The 4.4% rate was reduced from 4.55% by HB 23-1375 (2023), amending CRS 39-22-104; for tax year 2024 only, a TABOR surplus mechanism temporarily lowered the rate to 4.25%.
Does Colorado have a standard deduction?
Colorado does not have its own standard deduction. Its tax starts from federal taxable income, so the federal standard deduction applies. For tax year 2025 the federal amounts are $15,750 for single filers and married filing separately, $31,500 for married filing jointly, and $23,625 for head of household. Colorado taxpayers with federal AGI over $300,000 must add back the portion of that deduction above $12,000 (single) or $16,000 (joint).
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, sometimes as a temporary income tax rate reduction (as in tax year 2024, when the rate fell to 4.25%) and sometimes as direct rebates. The 4.4% flat rate is the standard rate for 2025.
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 Jul 16, 2026.
Reviewed by the CalculatorHub team, edited by James Graham, 11 June 2026. See our methodology. General information, not financial or tax advice.