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Montana Income Tax Calculator 2026

Estimate your Montana federal and state income tax for 2025.

Your inputs

$

Your liability

Total tax
$14,449
After tax: $70,551
Federal tax
$10,541
Taxable: $70,400
State tax
$3,908
Taxable: $70,400
Effective rate
17.0%
Federal marginal
22.0%
Federal bracket breakdown
10.00%on $11,600$1,160
12.00%on $35,550$4,266
22.00%on $23,250$5,115

About Montana income tax

Tax structure

Montana uses a progressive income tax with multiple brackets. Your effective rate depends on income and filing status.

Snapshot at $75,000 (single)

  • Take-home: $57,604 per year
  • Federal tax: $8,341
  • State tax: $3,318
  • Effective rate: 23.19%
  • vs. Texas (no income tax): Montana keeps $3,318 more.

Compare to neighboring states

Idaho →Wyoming →South Dakota →North Dakota →All states

Montana tax FAQ

How much state income tax will I pay in Montana?

Montana state income tax depends on your taxable income and filing status. Use the calculator above for an exact estimate.

What's the difference between federal and Montana state tax?

Federal income tax is collected by the IRS using nationwide brackets (10%–37%). Montana state income tax (where applicable) is separate and uses its own brackets and deductions. Both apply to most Montana residents.

Are these the 2025 or 2026 tax brackets?

The calculator uses tax year 2025 federal brackets — the figures you'll use to file in early 2026. The IRS adjusts brackets annually for inflation; we update when 2026 figures are released.

Should I take the standard deduction or itemize?

Take whichever is larger. The 2025 standard deduction is $14,600 (single), $29,200 (married filing jointly), or $21,900 (head of household). Itemize if your mortgage interest, state and local taxes (capped at $10,000), and charitable donations exceed that amount.