Montana Income Tax 2026
Estimate onlyMontana taxes income at a single flat rate of 5.9%. See the full 2026 bracket table below and estimate your Montana income tax in seconds.
Reviewed by the TryClearTally editorial team · Last updated July 4, 2026 · Methodology & sources
Tax structure
flat
Top rate
5.9%
Rate
5.9%
Estimate your Montana income tax
Your income after deductions.
Estimated Montana tax
$4,425
5.90% effective rate
Marginal rate
5.90%
On your last dollar
Effective rate
5.90%
Tax ÷ taxable income
Based on Montana's single-filer schedule. Married-filing-jointly brackets differ in some states, and this ignores state-specific deductions, exemptions, credits, and local taxes. Estimate only, not tax advice.
Montana income tax rate (2026)
Single-filer schedule. Each rate applies only to the income within its range.
| Rate | Taxable income |
|---|---|
| 5.9% | All taxable income |
About Montana income tax
Montana taxes income at a single flat rate of 5.9%. Because the system is flat, every dollar of taxable income is taxed at the same 5.9% rate.
This page applies Montana's published single-filer brackets to the income you enter. It doesn't include Montana's own standard deduction, personal exemptions, or credits, which can lower your actual bill. For your full paycheck picture, combine this with federal tax using our Take-Home Pay Calculator.
FAQ
Montana uses a flat 5.9% on taxable income (single-filer schedule).
Montana figures use the 2026 tax year (PayrollTax API). Estimates for planning only, not tax advice. See https://trycleartally.com/disclaimer.