Tax Bracket for Montana (2026)
Last updated: January 15, 2026
Montana (MT) Key Facts
Tax Structure
Progressive (2 brackets)
Top Marginal Rate
6.75%
Number of Brackets
2
Tax Year
2,026
How This Calculator Works in Montana
This calculator shows which Montana tax bracket your income falls into. Enter your income and filing status to see marginal and effective rates.
Montana Overview
Montana uses a progressive income tax system with 2 brackets ranging from 4.7% to 5.9%. Higher portions of your income are taxed at higher rates, so your effective rate is always lower than your top marginal bracket.
How Montana Compares
Montana's top rate of 6.75% compares to Idaho at 5.8% and Wyoming at 0%. Comparing effective rates is more meaningful than top rates alone.
| State | Top Rate | Notes |
|---|---|---|
| Idaho | 5.8% | Idaho has an income tax rate of 5.8%. |
| Wyoming | 0% | Wyoming has an income tax rate of 0%. |
| North Dakota | 1.95% | North Dakota has an income tax rate of 1.95%. |
Montana's income tax rate of 6.75% compares to a national average of approximately 5.04%. This is above the national average.
Tips for Montana Residents
- 1Montana has a progressive income tax with 2 brackets ranging from 4.7% to 5.9%.
- 2Your marginal rate (the rate on your last dollar) is often higher than your effective rate (total tax / total income).
- 3Moving into a higher bracket only taxes the additional income at the higher rate, not your entire income.
- 4Pre-tax 401(k) and IRA contributions can keep you in a lower Montana bracket by reducing taxable income.
- 5Compare your effective rate rather than marginal rate when evaluating Montana's tax impact on your finances.