What is the Colorado income tax rate?

Colorado has a flat income tax rate of 4.4%. All taxable income is taxed at this same rate regardless of income level.

Does Colorado have a standard deduction?

Yes. The Colorado standard deduction is $14,600 for single filers and $29,200 for married filing jointly.

How is Colorado income tax calculated?

Colorado uses a flat tax system. After subtracting your standard deduction (if applicable), your remaining taxable income is taxed at a flat rate of 4.4%, then added to your federal tax and FICA obligations.

How do I calculate my total Colorado tax bill?

Your total tax includes federal income tax (10%–37%), Social Security (6.2% on the first $176,100), Medicare (1.45%), and Colorado state income tax. Use our free calculator above for an instant breakdown.

Colorado Income Tax Calculator 2026

Estimate your Colorado (CO) income tax for 2026. Colorado has a 4.4% flat state income tax. Enter your income below and click “Calculate Taxes” for an instant breakdown.

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Colorado Income Tax Overview

Colorado has a flat income tax rate of 4.4%. This means all taxable income is taxed at the same rate regardless of how much you earn.

The standard deduction in Colorado is $14,600 for single filers and $29,200 for married filing jointly.

Key Facts About Colorado Taxes

Colorado reduced its flat income tax rate to 4.4% in 2024 (down from 4.55% in 2022), continuing a multi-year trend of tax cuts funded by TABOR refund mechanisms.

The state uses the federal standard deduction as its starting point, making tax filing straightforward. Colorado also offers a generous earned income tax credit equal to 25% of the federal EITC.

Frequently Asked Questions

What is the Colorado income tax rate?: Colorado has a flat income tax rate of 4.4%. All taxable income is taxed at this same rate regardless of income level.
Does Colorado have a standard deduction?: Yes. The Colorado standard deduction is $14,600 for single filers and $29,200 for married filing jointly.
How is Colorado income tax calculated?: Colorado uses a flat tax system. After subtracting your standard deduction (if applicable), your remaining taxable income is taxed at a flat rate of 4.4%, then added to your federal tax and FICA obligations.
How do I calculate my total Colorado tax bill?: Your total tax includes federal income tax (10%–37%), Social Security (6.2% on the first $176,100), Medicare (1.45%), and Colorado state income tax. Use our free calculator above for an instant breakdown.

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