Montana Income Tax Calculator (2026 Filing Season)
Montana 2025 brackets: 4.7%–5.9%, depending on income and filing status.
Montana now piggybacks on federal taxable income with just two brackets — and has no sales tax.
We subtract Montana's standard deduction ($15,000) automatically.
The same $75,000 income in a no-income-tax state (Texas, Florida, Tennessee…) would owe $0 in state income tax — a difference of $3,287 per year.
We only store your state and filing status — never your income.
Montana 2025 Tax Brackets
Single
| Taxable income over | Rate |
|---|---|
| $0 | 4.7% |
| $21,100 | 5.9% |
Married filing jointly
| Taxable income over | Rate |
|---|---|
| $0 | 4.7% |
| $42,200 | 5.9% |
Standard deduction: $15,000 (single) / $30,000 (married filing jointly) — subtracted automatically in the estimator above.
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These handle both your federal and Montana state return.
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Our complete Montana tax guide covers sales tax, property tax, deadlines, and key deductions.
Educational estimate only — excludes credits, itemized deductions, and local income taxes except where noted. 2025 tax-year data, verified 2026-06. Not tax advice; confirm with the Montana revenue department or a tax professional before filing.