Montana Income Tax
Montana uses progressive income tax brackets. Each rate applies only to income within that range, similar to the federal system.
Why It Matters
Understanding Montana's income tax structure helps you accurately estimate take-home pay, compare compensation across states, and plan for your total tax burden.
Try the calculator
Open Montana Income Tax Calculator →How It Works
The calculator computes both your federal and Montana state income tax to show your combined tax burden. Enter your taxable income to see the breakdown.
Example
Single filer • $100,000 taxable income • 2025
Federal
$16,914
16.91%
Montana
$5,647
5.65%
Combined
$22,561
22.56%
Resources
Frequently Asked Questions
How do Montana's tax brackets work?
Montana uses 2 progressive brackets similar to the federal system. Each rate applies only to income within that bracket range, so your effective rate is always lower than your top marginal rate of 5.90%.
Is Montana's income tax in addition to federal tax?
Yes. You pay both federal income tax and Montana state income tax. This calculator shows your combined total tax burden from both.
What is Montana's top income tax rate?
Montana's top marginal income tax rate is 5.90%, which applies only to income in the highest bracket. Most earners pay a lower effective rate because earlier income is taxed at lower rates.
Key Terms
Next review: 2027-01-15 • Applies to tax year: 2025