Colorado
Colorado business compliance calendar
What Colorado asks of a company or a nonprofit registered or doing business there, beyond the federal filings every organization owes. Pick your entity type for the full calendar with dates.
LLC 2026LLC 2027C corporation 2026C corporation 2027S corporation 2026S corporation 2027partnership 2026partnership 2027sole proprietorship 2026sole proprietorship 2027nonprofit 2026nonprofit 2027
Registration and franchise filings
| Entity | Filing | Fee | If missed |
|---|---|---|---|
| Corporations | Periodic report, by the last day of the anniversary month of its formation, with the Colorado Secretary of State | $25 | $50 late fee; delinquent status after the two month grace period |
| LLCs | Periodic report, by the last day of the anniversary month of its formation, with the Colorado Secretary of State | $25 | $50 late fee; delinquent status after the two month grace period |
| Partnerships | Periodic report, by the last day of the anniversary month of its formation, with the Colorado Secretary of State | $25 | $50 late fee; delinquent status after the two month grace period |
| Nonprofits | Periodic report, by the last day of the anniversary month of its formation, with the Colorado Secretary of State | $25 | $50 late fee; delinquent status after the two month grace period |
Taxes and employers
- Corporate income tax
- Yes. C corporations file a Colorado return by the 15th day of the fourth month after the year ends, with the Colorado Department of Revenue.
- Personal income tax
- Yes. S corporations and partnerships file a Colorado information return, and employers withhold state income tax.
- Employers
- Register for unemployment insurance and file wage reports every quarter. Reconcile income tax withholding after year end.
- Sources
- Colorado Secretary of State, Colorado Department of Revenue
All Colorado rules in the pack
- Colorado periodic reportby the last day of the anniversary month of its formation
- Colorado periodic reportby the last day of the anniversary month of its formation
- Colorado periodic reportby the last day of the anniversary month of its formation
- Colorado nonprofit periodic reportby the last day of the anniversary month of its formation
- Colorado charitable organization registration renewalby the 15th day of the 5th month after the fiscal year ends (May 15 for a calendar year)
- Colorado corporate income tax returnby the 15th day of the 4th month after the fiscal year ends (April 15 for a calendar year)
- Colorado corporate estimated tax paymenton the 15th day of the 4th, 6th, 9th, 12th months of the fiscal year (April 15, June 15, September 15, December 15 for a calendar year)
- Colorado pass through entity returnby the 15th day of the 3rd month after the fiscal year ends (March 15 for a calendar year)
- Colorado personal income tax return with business incomeby April 15 each year
- Colorado unemployment insurance wage reportby the last day of the 1st month after each quarter
- Colorado annual withholding reconciliationby January 31 each year
- Colorado FAMLI premium reportby the last day of the 1st month after each quarter
- Colorado retirement savings mandate (Colorado SecureSavings, 5 or more employees)with no fixed date
- Colorado sales tax returnby the 20th day of the 1st month after each quarter