US state guide

Montana withholding explained

Montana is now much closer to a federal-style annual estimate than a legacy allowance worksheet.

In short

For 2026, Montana wage withholding uses the federal filing status and standard deduction baseline, then applies the published ordinary-income rate bands. That makes the estimate easier to understand, but it still is not the same thing as a full payslip calculation.

What changed

Montana's Department of Revenue says the 2026 wage withholding update moved the system toward the federal standard deduction approach and new two-rate ordinary-income tables. The state also says employees can request additional withholding on Form MW-4.

Why your pay can still differ

Special subtractions, exempt wage categories, capital gains rules and return-level deductions are not handled by a simple salary calculator. If your job has unusual payroll treatment, the real paycheck may be different from the annual estimate.

How to use the calculator well

  1. Choose the same federal filing status you expect on your return.
  2. Use the Montana extra withholding box only if you already know the annual amount you want added.
  3. Compare the result with a recent payslip after the first few checks of the year.

Use the US take-home pay calculator for the estimate. This guide is a plain-English summary only.