Montana Tax Brackets 2026
Montana state income tax rates for tax year 2026 — 2 progressive brackets from 4.7% to 5.9%, with separate thresholds for single filers and married filing jointly.
Tax year
2026
Type
Progressive
Rate range
4.7%–5.9%
Brackets
2
Montana state tax at common incomes (2026)
| 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).
2026 brackets — Single filer
| Taxable income | Rate |
|---|---|
| $0 – $20,500 | 4.7% |
| Over $20,500 | 5.9% |
2026 brackets — Married filing jointly
| Taxable income | Rate |
|---|---|
| $0 – $20,500 | 4.7% |
| Over $20,500 | 5.9% |
About Montana's rates
Montana uses a seven-bracket progressive tax system with rates from 1.0% to 5.9%. The top rate applies at just $23,800 of taxable income, meaning most full-time workers reach the maximum bracket quickly. Montana increased its top rate from 6.9% to 5.9% — a reduction — and consolidated brackets effective 2024.
Planning note
Montana's top rate hits early ($23,800), so tax planning focuses on credits and deductions rather than bracket management. Montana allows a federal income tax deduction and has no general sales tax at the state level (though some resort areas impose a local sales tax).
View 2025 Montana tax brackets for comparison.
Frequently asked questions
What are the Montana tax brackets for 2026?
Montana has 2 progressive brackets for 2026, 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 2026?
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 2026?
A single filer with $100,000 of taxable income owes $5,654 in Montana state income tax for 2026 — 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 2026 tax brackets the same as 2025?
Bracket thresholds may have changed for 2026 via inflation indexing or legislative action. The figures on this page are the Montana bracket thresholds in effect for tax year 2026.
Explore more Montana tax info
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