Self-Employment Tax for Colorado (2026)
Colorado (CO) Key Facts
Federal S E Tax Rate
15.3%
State Income Tax Rate
4.4%
Combined S E + State Rate
19.7%
S E Tax Components
12.4% Social Security + 2.9% Medicare
How This Calculator Works in Colorado
This calculator estimates your total self-employment tax in Colorado, including the federal 15.3% SE tax and Colorado's state income tax. Enter your net SE income to see your liability.
Colorado Overview
Self-employed workers in Colorado pay the federal 15.3% SE tax plus state income tax at flat 4.4%, for a combined burden of approximately 19.7%. Quarterly estimated payments are typically required for both federal and state obligations.
How Colorado Compares
Colorado's combined SE burden of 19.7% compares to Utah at 20.0% and New Mexico at 21.2%. State income tax creates meaningful differences between states.
| State | Top Rate | Notes |
|---|---|---|
| Utah | 4.65% | Utah has a state income tax on SE income rate of 4.65%. |
| New Mexico | 5.9% | New Mexico has a state income tax on SE income rate of 5.9%. |
| Kansas | 5.7% | Kansas has a state income tax on SE income rate of 5.7%. |
Colorado's state income tax on SE income rate of 4.4% compares to a national average of approximately 5.04%. This is below the national average.
Tips for Colorado Residents
- 1Federal self-employment tax is 15.3% (12.4% Social Security + 2.9% Medicare) regardless of state.
- 2Colorado adds state income tax at flat 4.4% on self-employment income, for a combined rate of about 19.7%.
- 3Make quarterly estimated payments for both federal and Colorado state taxes to avoid underpayment penalties.
- 4Deduct half of your SE tax on your federal return and track all business expenses to minimize net self-employment income.
- 5Consider whether an S-Corp election could reduce your SE tax burden if your net income exceeds $50,000-$60,000.