The cost to incorporate in Colorado is $50.00, and if you submit your application electronically and have filled out the Articles of Incorporation correctly, acceptance is instantaneous. You will received a PDF of your Articles, stamped with "FILED" and your filing date and corporate ID number.
In addition to the cost to incorporate, Colorado requires a fee for certain other filings: periodic reports, amendments, dissolutions, and other documents. Many of these filings can also be completed and paid for online, but paper forms are available for filing in the Secretary of State's Business Organizations division's Denver office.