No office visits needed.1040 Itemized Returns for 2023-2024 tax season start at $500.

Colorado State Tax Guide

Everything you need to know about taxes in the Centennial State.

Unlike many states that have a progressive income tax, Colorado has a flat income tax rate of 4.63%. This ranks about in the middle of the pack among the eight states with a flat income tax.

According to the Tax Foundation, Colorado’s top individual income tax rate is 4.63%. The state and local individual income tax collections per capita is $1209 (ranked 15th in the US). The state and local tax burden is 8.9% (ranked 35th in the US).

Colorado Tax Forms

Important forms and publications for Colorado can be found at

Colorado Income Tax Calculator

If you’d like to estimate your individual income tax for the state of Colorado, check out this Colorado income tax calculator.

Contact Information for the Colorado State Tax Office

Contact information for the Colorado Department of Revenue (Taxation Division) can be found below.

Colorado Taxpayer Hotline

Taxpayer Service Representatives are available Monday through Friday, 8:00 a.m. to 4:30 p.m. MT (except on state holidays). Just call (303) 238-7378.

Colorado Taxation Division Contact Options

To contact the Colorado Taxation Division via email, appointment, mail, or other option, visit

Tax Help for Colorado Residents

If you’re a Colorado resident looking to minimize your state tax liability, or if you’re considering moving into or out of Colorado and have questions about establishing residency and/or tax nexus, we have the expertise to assist you. Contact our office for more information today.

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