Montana paycheck withholding calculator
Estimate how your paycheck withholding compares with a simplified annual Montana income tax estimate. Enter your yearly wages and the state tax amounts from your paystub. Review the assumptions before changing payroll settings.
Montana tax snapshot: Montana taxes wages with 2 graduated brackets ranging from 4.7% to 5.9%. The Montana standard deduction in this estimate is $14,600 for single filers — confirm the current-year figure in state instructions. The personal exemption is $2,820. To change Montana withholding, file Montana Form MW-4 with your employer.
Check your Montana paycheck withholding
Enter your yearly wages and the state tax amounts from your paystub. This is a planning estimate, not your final state tax bill.
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Montana income tax brackets (2026)
| Taxable income | Rate |
|---|---|
| $0 to $20,500 | 4.7% |
| $20,500 and over | 5.9% |
Standard deduction $14,600 (single). Personal exemption $2,820. Filing status, deductions, credits, and local taxes can change your actual withholding.
How to adjust Montana withholding
File Montana Form MW-4 with your employer to change Montana paycheck withholding. Confirm you have the current-year version, enter only the lines your situation requires, and check your next paystub's state-tax line to verify the change took effect within one or two pay periods.
What is the Montana state income tax rate?
Montana uses graduated brackets from 4.7% to a top rate of 5.9%. This is a planning estimate — check current state instructions for your filing status and year.
What form changes Montana withholding?
Montana Form MW-4. Ask HR for the current-year version; payroll generally applies the change within one or two pay periods.