Self-Employment Tax for Montana (2026)
Montana (MT) Key Facts
Federal S E Tax Rate
15.3%
State Income Tax Rate
6.75%
Combined S E + State Rate
22.1%
S E Tax Components
12.4% Social Security + 2.9% Medicare
How This Calculator Works in Montana
This calculator estimates your total self-employment tax in Montana, including the federal 15.3% SE tax and Montana's state income tax. Enter your net SE income to see your liability.
Montana Overview
Self-employed workers in Montana pay the federal 15.3% SE tax plus state income tax at up to 5.9%, for a combined burden of approximately 21.2%. Quarterly estimated payments are typically required for both federal and state obligations.
How Montana Compares
Montana's combined SE burden of 22.1% compares to Idaho at 21.1% and Wyoming at 15.3%. State income tax creates meaningful differences between states.
| State | Top Rate | Notes |
|---|---|---|
| Idaho | 5.8% | Idaho has a state income tax on SE income rate of 5.8%. |
| Wyoming | 0% | Wyoming has a state income tax on SE income rate of 0%. |
| North Dakota | 1.95% | North Dakota has a state income tax on SE income rate of 1.95%. |
Montana's state income tax on SE income rate of 6.75% compares to a national average of approximately 5.04%. This is above the national average.
Tips for Montana Residents
- 1Federal self-employment tax is 15.3% (12.4% Social Security + 2.9% Medicare) regardless of state.
- 2Montana adds state income tax at up to 5.9% on self-employment income, for a combined rate of about 21.2%.
- 3Make quarterly estimated payments for both federal and Montana 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.