Montana Tax Brackets 2025
Montana state income tax rates for tax year 2025 — 2 progressive brackets from 4.7% to 5.9%, with separate thresholds for single filers and married filing jointly.
Tax year
2025
Type
Progressive
Rate range
4.7%–5.9%
Brackets
2
Montana state tax at common incomes (2025)
| Taxable income | Single — tax | Single — effective | MFJ — tax | MFJ — effective |
|---|---|---|---|---|
| $50,000 | $2,704 | 5.41% | $2,704 | 5.41% |
| $75,000 | $4,179 | 5.57% | $4,179 | 5.57% |
| $100,000 | $5,654 | 5.65% | $5,654 | 5.65% |
| $150,000 | $8,604 | 5.74% | $8,604 | 5.74% |
| $250,000 | $14,504 | 5.80% | $14,504 | 5.80% |
| $500,000 | $29,254 | 5.85% | $29,254 | 5.85% |
State income tax only. Excludes federal tax, FICA, and local/city taxes. Assumes taxable income (after deductions).
2025 brackets — Single filer
| Taxable income | Rate |
|---|---|
| $0 – $20,500 | 4.7% |
| Over $20,500 | 5.9% |
2025 brackets — Married filing jointly
| Taxable income | Rate |
|---|---|
| $0 – $20,500 | 4.7% |
| Over $20,500 | 5.9% |
About Montana's 2025 rates
Montana uses a progressive tax system where higher portions of income are taxed at higher rates. Montana does not have a general sales tax, making income tax its primary revenue source. The state does not tax Social Security benefits and has no local income taxes.
Frequently asked questions
What are the Montana tax brackets for 2025?
Montana has 2 progressive brackets for 2025, ranging from 4.7% on the lowest bracket up to 5.9% on income above $20,500 (single filer). See the full table above for every rate and threshold.
What is the top Montana income tax rate in 2025?
5.9%, applied to taxable income above $20,500 for single filers ($20,500 for married filing jointly).
How much Montana state tax on $100,000 in 2025?
A single filer with $100,000 of taxable income owes $5,654 in Montana state income tax for 2025 — an effective rate of 5.65%. Married filing jointly with the same income owes $5,654 (5.65% effective). Federal tax is separate.
Are Montana 2025 tax brackets the same as 2024?
Bracket thresholds may have changed for 2025 via inflation indexing or legislative action. The figures on this page are the Montana bracket thresholds in effect for tax year 2025.