Colorado State Income Taxes

The state of Colorado's filing deadline for income tax is April 15th.


This page:

  • Lists basic Colorado state tax information

  • Links to the major Colorado income tax forms

  • Shows you how you can save time and money by e-filing

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Colorado state taxes at a glance:

Tax Rate Range: Flat tax rate of 4.63% of your federal taxable income
Income Brackets: Flat Rate
Number of Brackets: 1
Personal Exemptions: None
Standard Deduction: None
Medical/Dental Deduction: Federal amount
Federal Income Tax Deduction: None

Filing your Colorado state income tax return

Figuring your Colorado state income tax is relatively simple, since a single flat tax rate is applied to all you taxable income. Also, Colorado made some tax credits unavailable, making your return even more simple.

For instance, starting in 2002, the state sales tax refund has been eliminated. In addition to discontinuing this refund, Colorado has also eliminated the following tax credits until further notice:

  • earned income credit
  • child tax credit
  • interest, dividend and capital gain subtraction
  • qualifying charitable contribution subtraction
  • health benefit plan credit
  • agriculture value added credit
  • family home care operators child tax credit
  • high technology scholarship contribution credit
  • individual development account contribution credit
  • foster care credit

However, there are a few remaining tax credits for which you may be eligible To find out more check the tax credit booklet.



Also, Colorado still allows a $20,000 pension/annuity exclusion for taxpayers who are at least 55 but not yet 65 years of age as of the last day of the tax year. For taxpayers who are at least 65 years of age, Colorado allows a $24,000 pension/annuity subtraction.

Keep in mind that retirement benefits are faxable to the state you are currently living in regardless of whether the source is outside the state.

Since Colorado does impose the flat tax rate, your capital gains are taxed at the same rate as the rest of your income.

Nonresidents of Colorado that earn income from a Colorado source, must file a Colorado state income tax return for the income earned.

Sidebar
You can work on your Colorado tax return online while filing your federal return (you can work on it for free, and pay nothing until you are ready to file).

Note: if you are filing more than one state return, you must file a paper return for each additional state, as TurboTax for The Web only allows one state prep.

Colorado income tax forms

The main Colorado tax forms are:

Form 104 | 2006 Colorado Individual Income Tax Return | Instructions


If you need Colorado income tax forms that are not listed here, you can download them from the Colorado tax forms site.


Or, just simply e-file!

Additional CO state taxes help

If you need help with your federal tax return, start with our basic guide to tax filing.

For additional help with filing CO income tax returns, see the official site of the Colorado Department of Revenue.

State income tax info: