Self-Employment Tax for Idaho (2026)
Idaho (ID) Key Facts
Federal S E Tax Rate
15.3%
State Income Tax Rate
5.8%
Combined S E + State Rate
21.1%
S E Tax Components
12.4% Social Security + 2.9% Medicare
How This Calculator Works in Idaho
This calculator estimates your total self-employment tax in Idaho, including the federal 15.3% SE tax and Idaho's state income tax. Enter your net SE income to see your liability.
Idaho Overview
Self-employed workers in Idaho pay the federal 15.3% SE tax plus state income tax at flat 5.8%, for a combined burden of approximately 21.1%. Quarterly estimated payments are typically required for both federal and state obligations.
How Idaho Compares
Idaho's combined SE burden of 21.1% compares to Washington at 15.3% and Oregon at 25.2%. State income tax creates meaningful differences between states.
| State | Top Rate | Notes |
|---|---|---|
| Washington | 0% | Washington has a state income tax on SE income rate of 0%. |
| Oregon | 9.9% | Oregon has a state income tax on SE income rate of 9.9%. |
| Montana | 6.75% | Montana has a state income tax on SE income rate of 6.75%. |
Idaho's state income tax on SE income rate of 5.8% compares to a national average of approximately 5.04%. This is above the national average.
Tips for Idaho Residents
- 1Federal self-employment tax is 15.3% (12.4% Social Security + 2.9% Medicare) regardless of state.
- 2Idaho adds state income tax at flat 5.8% on self-employment income, for a combined rate of about 21.1%.
- 3Make quarterly estimated payments for both federal and Idaho 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.