MT

Montana Paycheck Calculator

See exactly what you take home after federal taxes, Montana state income tax, Social Security, and Medicare. Updated for 2026.

State tax: 5.9% SS: 6.2% Medicare: 1.45% 2026 brackets
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1099 freelancer note: You owe both halves of Social Security & Medicare — that's 15.3% self-employment tax on top of income tax. Quarterly estimated payments due Apr 15, Jun 16, Sep 15, Jan 15.
Montana state income tax (2026) Montana uses a flat 5.9% income tax rate as of 2024.
Flat 5.9% on all taxable income (as of 2024)

Montana Income Tax Explained (2026)

Montana has a state income tax with a flat 5.9% (simplified 2024) structure. Workers earning typical wages generally pay an effective state rate between 3.0% and 5.9% depending on income and deductions. Understanding how Montana's tax works helps you accurately predict your take-home pay and plan your withholding.

Montana residents also pay federal income tax (10%–37%), Social Security (6.2% up to $184,500), and Medicare (1.45%). The combination of federal and state taxes is the primary driver of the gap between your gross pay and your actual paycheck.

How Montana compares to neighboring states

Idaho
5.8% flat
Similar rate
Wyoming
No income tax
Zero tax
North Dakota
2.5% flat
Much lower
South Dakota
No income tax
Zero tax

What taxes come out of a Montana paycheck?

A Montana W-2 employee's paycheck is reduced by federal income tax (progressive 10%–37%), Montana state income tax (flat 5.9% (simplified 2024)), Social Security at 6.2% on wages up to $184,500, and Medicare at 1.45% on all wages. High earners above $200,000 also pay an additional 0.9% Medicare surtax on excess wages.

Montana freelancers and 1099 contractors pay self-employment tax of 15.3% — covering both employee and employer portions of Social Security and Medicare — on top of both federal and state income taxes. Half of the self-employment tax is deductible from federal adjusted gross income, reducing the effective burden slightly. Montana freelancers must also make quarterly estimated state tax payments.

Montana tax tips for 2026

  • Flat rate (since 2024): Montana simplified its tax system in 2024, moving to a two-bracket system (4.7% and 5.9%) that effectively functions as a near-flat tax for most workers.
  • Standard deduction: Montana has its own standard deduction structure — approximately $5,000 for single filers and $10,000 for married filers (2026), lower than federal.
  • Retirement income: Montana partially taxes Social Security — the federally taxable portion is also taxed in Montana, though there is a partial exemption for lower-income retirees.
  • No sales tax: Montana has no state sales tax, partially offsetting its income tax burden for residents.

Frequently asked questions

Montana simplified its income tax in 2024 to two brackets: 4.7% on taxable income up to $20,500 (single) and 5.9% on income above $20,500. For most working adults earning above $30,000, the majority of their income is taxed at 5.9%. This is down from Montana's previous seven-bracket system that topped out at 6.75%.
For a single filer earning $75,000 in Montana in 2026, after Montana's standard deduction (~$5,000), taxable income is ~$70,000. State tax is approximately $3,900 (4.7% on first $20,500, 5.9% on remainder). Combined with federal tax (~$10,294), Social Security ($4,650), and Medicare ($1,088), total deductions are ~$19,932. Take-home is approximately $55,068/year or ~$2,118 bi-weekly.
No. Montana is one of five states with no state sales tax. This provides meaningful savings on everyday purchases and large transactions like vehicles. Combined with Montana's relatively modest income tax rate, the overall tax burden on consumers is lower than the income tax rate alone would suggest.
Montana follows federal rules for Social Security taxation. The federally taxable portion of your Social Security income (up to 85% for higher earners) is also subject to Montana income tax. Montana does provide a partial exemption for lower-income retirees, but most middle-income retirees will pay some Montana state tax on their Social Security benefits.
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