Colorado Tax Brackets, Rates and Standard Deductions

Here you will find income tax related deadlines, forms etc. for the State of Colorado.

You can prepare and e-File your Colorado Income Taxes here on together with your Federal Income Tax Return. Information on how to only file a Colorado State Income Return.

Find Colorado income tax forms, tax brackets, deductions, and rates by tax year.

However, if you still need to file a return for a previous tax year, find the Colorado tax forms below. You can complete and sign the forms here on before you mail them to the CO Department of Revenue. For Federal or IRS back taxes access the tax forms here.

Below find links to other important Colorado income tax return information and other related features (e.g. tax extension, amendment, etc.)

Colorado Income Tax Returns

Colorado Income Taxes
Prepare only a CO State Return without an IRS return. Details
Step by Step instructions on how to only Prepare and Download - not eFile - State Returns on
File a Colorado Tax Amendment
Colorado Income Tax Forms
Colorado Tax Brackets, Rates explained
IRS Tax Brackets, Rates by Tax Year
Calculate and Estimate your IRS Income Tax Brackets and Rates with the eFile RATEucator.

Income Tax Brackets, Rates, Income Ranges, and Estimated Taxes Due

Here you can find how your Colorado based income is taxed at a flat rate. When you prepare your return on this is all calculated for you based on your income.

Colorado Tax Brackets for Tax Year 2023

CO flat income tax rate will be updated as they become available.

Colorado Tax Brackets for Tax Year 2022

Colorado has a flat income tax rate of 4.40%.

Colorado Tax Brackets for Tax Year 2021

Colorado has a flat income tax rate of 4.50%.

Colorado Standard and Itemized Deductions

The Colorado standard deductions did increase for current tax year. You can also itemize your Colorado deductions.

When you prepare and eFile your Tax Return the eFile Tax App will apply the correct standard deductions for you or you can apply the itemized deduction method.

Tax Year
Single or MFS
Married Jointly
Head of Household
Single or MFS
Married Jointly
Head of Household
Single or MFS
Married Jointly
Head of Household