Montana Payroll Tax Calculator 2026
Calculate Montana state income tax, federal withholding, Social Security, Medicare, and net take-home pay.
2026 Montana tax rates · FICA · Montana MW-4
State Income Tax
Up to 6.75% (progressive)
Social Security
6.2%
Medicare
1.45%
State Form
Montana MW-4
Calculate Your Montana Paycheck
Enter your salary or hourly rate and get a full breakdown: Montana state tax, federal income tax, Social Security, Medicare, and exact net pay.
Open Montana Payroll Tax CalculatorFree · No signup · 2026 IRS & MT rates
Montana Tax Guide
Montana Payroll Tax Overview 2026
Montana uses a progressive income tax with a top rate of 6.75%. Higher earners pay a larger percentage of their income — different brackets apply to different income ranges.
Montana has seven income tax brackets with a top rate of 6.75% on income over $20,500 (single). Montana has relatively low income thresholds for its top rate.
Montana does not have a state sales tax, so income tax is a primary revenue source — explaining why rates are moderate to high.
Montana Payroll Tax Summary
State Income TaxUp to 6.75% (progressive)
Tax TypeProgressive (brackets)
Social Security6.2% on first $176,100
Medicare1.45% (+ 0.9% over $200K)
FUTA (employer)0.6% on first $7,000
Employee FormMontana MW-4
FAQ
Montana payroll tax questions
What is the top Montana income tax rate for 2026?
Montana's top income tax rate is 6.75% for 2026. This is a marginal rate — it only applies to income above the top bracket threshold. Lower income falls into lower brackets. Use the calculator above to see your effective rate.
What taxes do Montana employees pay on their paycheck?
Montana employees pay: (1) Federal income tax (based on W-4 withholding); (2) Social Security tax (6.2% on wages up to $176,100); (3) Medicare tax (1.45%, plus 0.9% on income over $200,000); (4) Montana state income tax (Up to 6.75% (progressive)); The employer matches the Social Security and Medicare portions.
What payroll withholding form do Montana employees use?
Montana employees complete Montana MW-4 for state withholding in addition to the federal W-4. Employers use both forms to calculate the correct combined withholding amount.
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