Self-Employment Tax for Connecticut (2026)
Connecticut (CT) Key Facts
Federal S E Tax Rate
15.3%
State Income Tax Rate
6.99%
Combined S E + State Rate
22.3%
S E Tax Components
12.4% Social Security + 2.9% Medicare
How This Calculator Works in Connecticut
This calculator estimates your total self-employment tax in Connecticut, including the federal 15.3% SE tax and Connecticut's state income tax. Enter your net SE income to see your liability.
Connecticut Overview
Self-employed workers in Connecticut pay the federal 15.3% SE tax plus state income tax at up to 6.99%, for a combined burden of approximately 22.3%. Quarterly estimated payments are typically required for both federal and state obligations.
How Connecticut Compares
Connecticut's combined SE burden of 22.3% compares to New York at 26.2% and Massachusetts at 20.3%. State income tax creates meaningful differences between states.
| State | Top Rate | Notes |
|---|---|---|
| New York | 10.9% | New York has a state income tax on SE income rate of 10.9%. |
| Massachusetts | 5% | Massachusetts has a state income tax on SE income rate of 5%. |
| Rhode Island | 5.99% | Rhode Island has a state income tax on SE income rate of 5.99%. |
Connecticut's state income tax on SE income rate of 6.99% compares to a national average of approximately 5.04%. This is above the national average.
Tips for Connecticut Residents
- 1Federal self-employment tax is 15.3% (12.4% Social Security + 2.9% Medicare) regardless of state.
- 2Connecticut adds state income tax at up to 6.99% on self-employment income, for a combined rate of about 22.3%.
- 3Make quarterly estimated payments for both federal and Connecticut 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.