Colorado Tax Brackets, Rates and Standard Deductions

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

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 2025

The flat income tax rate in Colorado will be 4% for the 2025 tax year.

Colorado Tax Brackets for Tax Year 2024

Colorado has a flat income tax rate of 4.25% for the tax year 2024.

Colorado Tax Brackets for Tax Year 2023

Colorado had a flat income tax rate of 4.40% for the 2023 tax year.

Colorado Tax Brackets for Tax Year 2022

Colorado had a flat income tax rate of 4.40% for the 2022 tax year.

• Income Tax Brackets for Other States: Compare State Tax Brackets, Rates
• For your personal Effective IRS Tax Rate use the RATEucator Tool

Colorado Standard and Itemized Deductions

The Colorado standard deductions did increase for 2024 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.

• Other Standard Deductions by State: Compare State Standard Deduction Amounts
• IRS Standard Deduction: Federal Standard Deductions

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