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Colorado Tax Brackets, Rates and Standard Deductions

You can prepare and e-File your 2021 Colorado Income Taxes here on eFile.com 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 eFile.com 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 eFile.com.
File a 2021 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 eFile.com this is all calculated for you based on your income.

Colorado Tax Brackets for Tax Year 2021

2021 Tax Brackets and Income ranges will be listed here as they become available.

Colorado Tax Brackets for Tax Year 2020

Colorado has a flat income tax rate of 4.55%.

2020 Colorado Standard Deductions

Colorado does not have standard deductions.

Colorado Income Tax Forms

Colorado State Income Tax Forms for Tax Year 2021 (Jan. 1 - Dec. 31, 2021) can be e-Filed in conjunction with a IRS Income Tax Return. Details on how to only prepare and print a Colorado 2021 Tax Return.

Below are forms for prior Tax Years starting with 2020. These back taxes forms can not longer be e-Filed. You can complete the forms with the help of eFile.com free tax calculators. Complete the respective Form(s) below, sign, and mail them to the Colorado Department of Revenue. In addition to filing Colorado Forms you might also have to file previous IRS Tax Return Forms.


A list of income tax forms for other states.