Montana Tax Calculator
Montana taxes income through a tiered bracket system that was recently simplified down to just two brackets, with the top rate also cut for 2026. Montana has no general sales tax, making income tax the state's primary revenue source. Social Security is not taxed at the state level. This calculator applies Montana's current two-bracket schedule to your entered income.
State Tax
$5,199Effective Rate
5.20%Marginal Rate
5.65%| Rate | Bracket Range | Tax |
|---|---|---|
| 4.70% | $0 – $47,500 | $2,233 |
| 5.65% | $47,500+ | $2,966 |
| Total | $5,199 | |
How Montana income tax works
- Montana applies just two brackets, taxing the first slice of income at a lower rate and the rest at the top rate.
- With no general sales tax, Montana relies more heavily on income tax to fund state government.
- The calculator applies both brackets to your entered income for an instant total.
Need the exact bracket thresholds instead of an estimate? See the Montana tax brackets for 2026 .
Estimate your Montana property tax by county, compare every state at the state tax brackets hub , or see the full tax-by-state directory .
Frequently asked questions
How is Montana income tax calculated?
Montana uses a simplified two-bracket system, taxing income up to a threshold at a lower rate and the remainder at the top rate. The calculator applies this schedule to your entered income.
Does Montana tax Social Security benefits?
No. Montana excludes Social Security benefits from state taxable income.
Does Montana have a sales tax?
No — Montana has no general state sales tax, which is part of why income tax plays such a central role in funding the state budget.
How much state tax will I pay in Montana?
It depends on which of the two brackets your income falls into. Enter your income above for an exact total.
Sources
Related insights
Use these guides for rule explanations, planning context, and follow-up questions beyond the calculator result.
Related Calculators
State Income Tax
All 50-state brackets, credits, deductions for your filing status
Paycheck Calculator
Federal, state, FICA withholding, net take-home, W-4 alignment
Federal Income Tax Calculator
10–37% brackets, $15,750 standard deduction, progressive calculation
State Tax Comparison
Side-by-side state income tax comparison for two or more states at your income level and filing status
State Tax Brackets Reference
2025 & 2026 state income-tax bracket pages for every state and DC that taxes wages