A “Doing Business As” name is referred to as a “Trade Name” by the state of Colorado. According to their Secretary of State, “an individual transacting business in the state of Colorado under a name other than the person’s true name is required to file a trade name.”
In Colorado you can file your DBA (aka trade name, assumed name or fictitious business name) yourself with your Secretary of State. Or, use a legal document service such as LegalZoom to handle the entire process for you.
LegalZoom charges $99.00 (plus state filing fees) for Colorado DBA’s. Click here to learn more about pricing.