Self-Employment Tax Calculator for Montana Freelancers (2026)
Montana freelancers pay federal self-employment tax (15.3%) plus 5.9% Montana state income tax on top.
Montana Tax Overview for Freelancers
Federal SE Tax
15.3%
Montana Income Tax
5.9%
SE Tax Deduction
50%
Standard Deduction
$15,700
Estimated Tax by Income — Montana Freelancers (2026)
| Annual Income | SE Tax | Federal Tax | MT State Tax | Total Tax | Effective Rate |
|---|---|---|---|---|---|
| $30,000 | -$4,239 | -$1,223 | -$1,770 | -$7,232 | 24.1% |
| $50,000 | -$7,065 | -$3,454 | -$2,950 | -$13,469 | 26.9% |
| $75,000 | -$10,597 | -$6,794 | -$4,425 | -$21,816 | 29.1% |
| $100,000 | -$14,130 | -$11,906 | -$5,900 | -$31,936 | 31.9% |
| $150,000 | -$21,194 | -$22,536 | -$8,850 | -$52,580 | 35.1% |
* Single filer, standard deduction, no other income. For exact figures use the calculator below.
Calculate Your Exact Montana Tax Bill
Enter your income and get a full breakdown including quarterly payment amounts.
Open Montana Tax Calculator →Frequently Asked Questions — Montana Freelancers
What is the self-employment tax rate in Montana for 2026?
In Montana, self-employed individuals pay the federal self-employment tax of 15.3% plus 5.9% Montana state income tax on net earnings. After deductions, the effective combined rate for most freelancers falls between 18% and 21%.
Do Montana freelancers need to pay quarterly estimated taxes?
Yes. If you expect to owe $1,000 or more in federal taxes for 2026, the IRS requires quarterly estimated payments. Montana also requires quarterly state estimated tax payments if your state tax liability exceeds $500. Due dates: April 15, June 16, September 15, and January 15, 2027.
What business deductions can Montana freelancers claim?
All standard federal deductions apply: home office, mileage (67 cents/mile in 2026), health insurance premiums, retirement contributions (up to $70,000 via Solo 401k), software, equipment, and professional development. These deductions reduce both your federal and Montana state tax liability.