Freelance Taxes in Colorado: Complete 2026 Guide
Rates reviewed · Source: Colorado Department of Revenue
Colorado has a low flat income tax rate of 4.4% on federal taxable income.
Quarterly Estimated Payments
CO requires quarterly estimated payments if you expect to owe $1,000 or more.
| Quarter | Income period | Due |
|---|---|---|
| Q1 | Jan 1 – Mar 31, 2026 | April 15, 2026 |
| Q2 | Apr 1 – May 31, 2026 | June 16, 2026 |
| Q3 | Jun 1 – Aug 31, 2026 | September 15, 2026 |
| Q4 | Sep 1 – Dec 31, 2026 | January 15, 2027 |
Revenue Online — Colorado Department of Revenue · Form DR 0104EP · How to pay online
Key Tax Facts for Colorado Freelancers
- •Low flat tax rate of 4.4%
- •Starting with federal taxable income simplifies calculation
- •TABOR refunds sometimes reduce effective rates
- •Denver occupational privilege tax applies to Denver-based workers
Deductions in Colorado
Colorado starts with federal taxable income, so federal deductions automatically apply. Colorado has few state-specific adjustments.
Top Freelancer Cities in Colorado
Colorado freelance tax questions
How much tax do freelancers pay in Colorado?
Three taxes apply: 15.3% federal self-employment tax on net earnings up to $184,500, federal income tax at your bracket, and Colorado income tax of 4.4% flat. Colorado has a low flat income tax rate of 4.4% on federal taxable income.
Do Colorado freelancers have to make quarterly estimated payments?
CO requires quarterly estimated payments if you expect to owe $1,000 or more. Federal estimated payments for 2026 are due Q1 April 15, 2026, Q2 June 16, 2026, Q3 September 15, 2026, Q4 January 15, 2027. Colorado follows the same schedule.
What can Colorado freelancers deduct?
Colorado starts with federal taxable income, so federal deductions automatically apply. Colorado has few state-specific adjustments.
Where do Colorado freelancers pay estimated taxes online?
Colorado accepts online estimated tax payments through Revenue Online, operated by the Colorado Department of Revenue. The state estimated tax form is Form DR 0104EP. Federal payments are made separately through IRS Direct Pay or EFTPS.
Tax Information Notice
This content is for informational and educational purposes only. It does not constitute tax, legal, or financial advice. Tax laws change frequently. Always consult a qualified CPA or Enrolled Agent for your specific situation.