United States
Colorado: what the state takes
Colorado charges its own income tax on top of federal tax. Here is the rate, the return, the date and where the official rules live.
Agency page last read 11 September 2026.
State rate
4.4%
Flat 4.40% on federal taxable income
Resident return
Form DR 0104
Colorado Department of Revenue
Due
15 April, following the federal deadline
Weekends and holidays can push it on
Try a figure
Yearly income
How you file
Colorado tax
$2,640
Top state rate you touch
4.4%
- Kept before federal tax$58,508
- Federal income tax$13,852
- Colorado tax$2,640
Flat rate of 4.4% on $60,000 after a $15,000 deduction.
Filing in Colorado
- Who collects it
- Colorado Department of Revenue
- Return
- Form DR 0104
- Deadline
- Usually 15 April, following the federal deadline
Federal comes on top
Whatever your state does, the IRS wants Form 1040 by 15 April, plus Social Security and Medicare through your wages or self employment tax. State tax paid can sometimes be deducted federally if you itemise, within a yearly cap.