Does Colorado offer a 529 tax deduction?

Yes. Colorado allows a state income tax deduction for contributions to a CollegeInvest 529 plan. The deduction is capped per beneficiary each year, and the limit is roughly doubled for married couples filing jointly.

How much can I deduct?

Colorado caps the annual deduction at about 24,000 dollars per beneficiary for single filers and around 36,000 dollars for joint filers, adjusted yearly for inflation. Contributions above the cap are not deductible that year.

How is the savings calculated?

Colorado has a flat income tax rate of about 4.4 percent. The deduction reduces your taxable income, so your savings equal the deductible contribution multiplied by that flat rate.

Can I carry forward excess contributions?

No. Unlike some states, Colorado does not allow you to carry forward 529 contributions above the annual deduction cap. Anything over the cap simply receives no deduction, so large contributions are often spread across years.

Does the deduction apply to any 529 plan?

The Colorado deduction applies only to contributions made to a Colorado CollegeInvest 529 plan. Contributing to another state's 529 plan does not qualify for the Colorado state income tax deduction.

Colorado 529 Plan Tax Benefit Calculator

Email me this result

Get this tool's output sent to your inbox, plus one useful tool a week. No spam, unsubscribe any time.

Colorado rewards college savers with a state income tax deduction for contributions to a CollegeInvest 529 plan. Because Colorado has a flat income tax rate, the value of that deduction is easy to calculate — and this tool does it.

How it works

The deductible amount is your contribution capped at the per-beneficiary limit for your filing status. Colorado’s flat tax rate then sets your savings:

deductible = min(contribution, cap for filing status)
tax savings = deductible × Colorado flat rate (≈4.4%)
net cost    = contribution − tax savings

Caps are roughly $24,000 per beneficiary (single) and $36,000 (married filing jointly), adjusted annually for inflation.

Example

A married couple contributes $10,000, fully under the joint cap. At a 4.4% flat rate they save 10000 × 0.044 = $440 in Colorado income tax, making the net cost of the contribution $9,560.

Notes

Colorado does not allow carryforward of contributions above the cap, so anything over the annual limit gets no deduction. The deduction applies only to Colorado CollegeInvest plans, not out-of-state 529s.