Montana Income Tax Calculator
Estimate your 2026 federal and Montana state income tax, FICA and take-home pay from your income and filing status.
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About the Montana Income Tax Calculator
This Montana income tax calculator estimates your 2026 federal income tax, Social Security and Medicare tax and Montana state income tax from your income and filing status. It applies the MT state brackets, standard deduction and personal exemption, and shows your take-home pay.
How to use it
- Enter your annual income and filing status.
- Add pre-tax deductions such as 401(k) and HSA contributions.
- Press Calculate tax to see your federal, FICA and Montana state tax and take-home pay.
Montana income tax brackets for 2026 (single filers)
Montana taxes wage income with graduated rates from 4.7% to 5.65%. The state standard deduction is $16,100 and the personal exemption is $0 for single filers where applicable.
| Taxable income | Rate |
|---|---|
| $0 to $47,500 | 4.7% |
| $47,500 and up | 5.65% |
Source: Tax Foundation, 2026 state individual income tax rates and brackets. Local taxes are not included.
Montana state income tax at common salaries
| Gross income | MT income tax | Effective rate |
|---|---|---|
| $40,000 | $1,123 | 2.81% |
| $60,000 | $2,063 | 3.44% |
| $80,000 | $3,159 | 3.95% |
| $100,000 | $4,289 | 4.29% |
| $150,000 | $7,114 | 4.74% |
Single filer, after the state standard deduction and personal exemption.
Frequently asked questions
How much is state income tax in Montana?
As of 2026, Montana has graduated rates from 4.7% to 5.65%.
What is the Montana standard deduction?
For single filers the Montana standard deduction is $16,100. Rules can differ by filing status.
How much tax would I pay on $80,000 in Montana?
A single filer with $80,000 of income pays about $3,159 in MT state income tax, an effective rate of 3.95%.
Does Montana tax Social Security?
Most states do not tax Social Security benefits, but a few do. Check the state revenue department for current rules.
Does this include local income tax?
No. Some cities and counties levy local income taxes. Confirm with your local government.
Last reviewed: November 2026. Estimates only, not tax advice.