2015 Colorado Income Tax Table
2015 - 2016
Tax Bracket (Single) Marginal Tax Rate
$0+ 4.63%
Tax Bracket (Married) Marginal Tax Rate
$0+ 4.63%

Colorado has a flat income tax rate which applies to both single and joint filers. The Federal Income Tax, in contrast to the Colorado income tax, has multiple tax brackets with varied bracket width for single or joint filers.

Please note: Our Colorado tax brackets are currently from tax year 2014. Many states adjust their tax brackets yearly, and we will update the Colorado tax brackets for 2015 as soon as they become available.

If you would like to file your Colorado income tax return by mail, you can download 2015 Colorado tax forms here.

Your 2015 income tax return was due on April 15th, 2016. The IRS and Colorado will soon be accepting tax returns, so you can start your online tax return today for free with TurboTax.

For earnings over $0.00, you'll pay 4.63% plus $0.00
For earnings over $0.00, you'll pay 4.63% plus $0.00

Colorado Tax Estimator

You can use the income tax estimator to the left to calculate your approximate Colorado and Federal income tax based on the most recent tax brackets.

Keep in mind that this estimator assumes all income is from wages, assumes the standard deduction, and does not account for tax credits.

For a more detailed estimate that takes these factors into account, click "View Detailed Estimate" (this will will redirect to an external website).


When calculating your Colorado income tax, keep in mind that the Colorado state income tax brackets are only applied to your adjusted gross income (AGI) after you have made any qualifying deductions.

Qualifying deductions might include an itemized deduction, the Colorado standard deduction, exemptions for dependants, business expenses, etc.

Remember that Colorado may have very different deduction laws from the Federal Income Tax, so you may have to write a whole new list of deductions for your Colorado income tax return.

Download Colorado Tax Data
Download the Colorado tax table for Excel or database applications Download a .CSV file of the Colorado income tax brackets
Download tax forms Download or print Colorado income tax forms
Where Our Tax Data Comes From
  1. The Colorado tax brackets on this page were last updated from the Colorado Department of Revenue in August, 2013. Please contact us if any of our Colorado tax data is incorrect or out of date.
  2. Colorado tax return forms are available on the Colorado tax forms page or the Colorado Department of Revenue.
  3. Before the official 2016 Colorado income tax brackets are released, the brackets used on this page are an estimate based on the previous year's brackets. These numbers are subject to change if new Colorado tax tables are released.
  4. The income tax estimator tool is provided by Tax-Rates.org.