Montana Income Tax Calculator (2026 Federal + State)
Graduated 5.9% state rate — combined tax on $75k is about $12,095
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7/16/2026
Input Parameters
Your Details
Your pay before any taxes or deductions, for the frequency you picked.
Deductions
401(k), HSA, and pre-tax health premiums. Lowers income tax (401k is still subject to FICA).
Optional. Leave at 0 to use your state's 2026 rate. Graduated states use an estimated effective rate — adjust here for precision.
Pre-set to Montana. Adjust your salary, filing status, and deductions — federal, state, and FICA tax update instantly.
How Income Tax Works in Montana (2026)
Montana uses graduated income tax brackets in 2026, meaning higher income is taxed at progressively higher rates — similar to the federal system. This calculator applies an estimated effective state rate of about 5.9% for middle incomes. On $75,000, that's roughly $4,425 in state income tax, plus $7,670 federal, for a combined income tax bill of about $12,095.
Because Montana has graduated brackets, your marginal rate (the rate on your last dollar earned) is higher than your effective rate (the blended rate across all brackets). This matters for side income, bonuses, and tax planning: additional earnings above your current bracket threshold are taxed at the marginal rate, not the lower effective rate.
Montana income tax by salary level (2026, single filer)
| Gross salary | Federal tax | State tax | Total income tax | Effective rate | After-tax income |
|---|---|---|---|---|---|
| $40,000 | $2,620 | $2,360 | $4,980 | 12.4% | $31,960 |
| $60,000 | $5,020 | $3,540 | $8,560 | 14.3% | $46,850 |
| $75,000 | $7,670 | $4,425 | $12,095 | 16.1% | $57,168 |
| $100,000 | $13,170 | $5,900 | $19,070 | 19.1% | $73,280 |
| $150,000 | $24,734 | $8,850 | $33,584 | 22.4% | $104,941 |
| $200,000 | $36,734 | $11,800 | $48,534 | 24.3% | $137,127 |
Single filer, standard deduction, no pre-tax deductions. After-tax income includes FICA deductions. 2026 federal brackets per IRS Rev. Proc. 2025-32.
Beyond your income tax
See your paycheck breakdown by pay period with the Montana Paycheck Calculator. For capital gains on investments, use the Capital Gains Tax Calculator. Freelancers and contractors can estimate self-employment tax with the Self-Employment Tax Calculator. Planning a home purchase? The Home Affordability Calculator factors in your after-tax income.
Compare Montana income tax with nearby states
- Idaho income tax calculator — flat 5.3%
- Wyoming income tax calculator — no state income tax
- North Dakota income tax calculator — graduated (~2.0%)
- South Dakota income tax calculator — no state income tax
See all 50 states on the Income Tax Calculator hub.
Frequently asked questions
What is the income tax rate in Montana for 2026?
Montana uses graduated income tax brackets in 2026. The estimated effective rate for a middle income is about 5.9%, though your actual rate depends on where your income falls across the brackets.
How much income tax do I pay on $75,000 in Montana?
A single filer earning $75,000 in Montana pays approximately $12,095 in combined federal and state income tax for 2026 — an effective income tax rate of about 16.1%. Adding FICA (Social Security + Medicare) brings total tax to about $17,833.
How does Montana's income tax compare to other states?
Montana's effective rate of about 5.9% is above the 4.8% average among states that tax income. Use the comparison links below to see specific neighboring states.
Does Montana have a sales tax?
No general statewide sales tax — Montana is one of five states without one. A few resort communities charge limited local resort taxes on lodging and prepared food, but everyday purchases are untaxed.
Methodology & sources
Federal tax uses 2026 IRS brackets and standard deductions (Revenue Procedure 2025-32). State tax rates reflect 2026 law from the Tax Foundation and state revenue departments; graduated-state figures are estimated effective rates. FICA uses the 2026 Social Security wage base of $184,500 (6.2%) plus Medicare (1.45%). Local city or county taxes (e.g. NYC, Portland) are not included. Estimates for planning only, not tax advice. See our editorial policy for how we verify formulas.