Who Must File?
Due Dates & Extensions
W-2 & 1099 Statements
Donate Your Refund to Charity
New Colorado Residents
Military Service Members
Request a Tax Return Copy
Frequently Asked Questions
A common-law marriage in Colorado is valid for all purposes, the same as a ceremonial marriage and it can only be terminated by death or divorce. Common-law spouses may file jointly, if they filed jointly on their federal tax return.
To be considered common-law married, the couple must meet all of the following criteria:
- Both are free to contract a valid ceremonial marriage (e.g. they are not already married to someone else)
- Holds themselves out as spouses
- Cohabits - lives together at the same permanent address
- Has the reputation in the community as being married
- Mutual consent of the couple presently to be spouses