How Colorado taxes your income
Colorado has a flat 4.4% state income tax for 2026. The Colorado income tax calculator above shows federal and state income tax separately, with your effective and marginal rates.
- Standard deduction: $16,100 (single) or $32,200 (married filing jointly).
- Pre-tax 401(k) contributions reduce your Colorado taxable wages.
Colorado tax rate
Colorado applies one rate of 4.4% to all taxable income.
Notes about Colorado rules
Colorado starts from federal taxable income, so the federal standard deduction applies.
What this calculator includes
It uses 2026 federal income tax brackets for single filers and married couples filing jointly, Social Security and Medicare tax, and the Colorado rules above. It does not include dependents, tax credits other than those listed, itemized deductions, self-employment tax, or head of household filing.
Rates, brackets and deductions as published for tax year 2026 (state data sourced February 2026).
Frequently asked questions
What is the state income tax rate in Colorado?
Colorado uses a flat rate of 4.4% on taxable income for 2026. Taxable income is your wages after the deductions and exemptions listed on this page.
What deductions does Colorado allow in this calculator?
Colorado has a standard deduction of $16,100 (single) or $32,200 (married filing jointly). These are the only Colorado deductions and credits the calculator uses. Itemized deductions and dependents are not included.
Do 401(k) contributions lower my Colorado income tax?
Yes. Pre-tax 401(k) contributions are taken out of your Colorado taxable wages as well as your federal taxable wages. They do not reduce Social Security or Medicare tax.
Which federal taxes apply to my pay in Colorado?
Federal income tax uses 2026 brackets from 10% to 37% after the $16,100 standard deduction for single filers. Social Security is 6.2% on wages up to $184,500 and Medicare is 1.45% on all wages, with 0.9% extra above $200,000 ($250,000 for joint filers).
Does this calculator include local taxes?
No. City, county and school-district income or payroll taxes are not included. If your area charges one, your real take-home pay will be a little lower.
Are Social Security and Medicare included?
No. This page shows income tax only. Use the Colorado salary calculator to see take-home pay after Social Security and Medicare as well.
How current is the Colorado data?
Rates, brackets and deductions as published for tax year 2026 (state data sourced February 2026). Tax laws change, so confirm important numbers with the official sources listed below.
Official and data sources
- Colorado – state tax agency
- IRS – Federal income tax rates and brackets
- Social Security Administration – Contribution and benefit base
- Tax Foundation – State Individual Income Tax Rates and Brackets, 2026
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Also for Colorado: Colorado Salary Calculator · Colorado Paycheck Calculator
Disclaimer: results are estimates for information only. They are not tax, legal or financial advice.