Montana Income Tax Brackets 2026
Montana uses a progressive income tax system with 2 brackets.
State Tax
5.9%
Top marginal rate
COL Index
107
Above national avg
Median Income
$66,341
Household
Brackets
2
Progressive
Montana Tax Brackets
| Income Range | Marginal Rate |
|---|---|
| $0 — $20,500 | 4.70% |
| $20,500 — and above | 5.90% |
Montana State Tax at Different Income Levels
| Gross Income | State Tax | Effective Rate |
|---|---|---|
| $50,000 | $2,704 | 5.41% |
| $75,000 | $4,179 | 5.57% |
| $100,000 | $5,654 | 5.65% |
| $150,000 | $8,604 | 5.74% |
| $200,000 | $11,554 | 5.78% |
| $300,000 | $17,454 | 5.82% |
Calculate Your Exact Montana Taxes
See your full federal + state + FICA breakdown with our interactive calculator.
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Frequently Asked Questions about Montana Taxes
Does Montana have state income tax?
Montana has a progressive income tax system with rates ranging from 4.7% to 5.9% for 2026.
How much is federal tax in Montana?
Federal income tax in Montana is the same as in all other US states. For 2026, the federal brackets range from 10% to 37%, depending on your taxable income and filing status.
What is the cost of living in Montana?
The cost of living in Montana has an index of 107, where 100 is the national average. This means Montana is 7% more expensive than the average US state.