Montana Paycheck Calculator
Free take-home pay estimator for Montana employees · 2026 tax rates · Updated January 2026
How Montana paycheck taxes work
Montana simplified its income tax to just two brackets — 4.7% for lower income and 5.9% above $20,500.
- Montana reduced its top income tax rate from 6.9% to 5.9% in 2024 as part of a major tax reform.
- The two-bracket system replaces the old seven-bracket structure.
- Montana has no general sales tax, which keeps the overall tax burden moderate.
Federal income tax withholding (2026)
Federal income tax withholding is calculated using the annualization method from IRS Publication 15-T. Your per-period gross pay is annualized, reduced by the standard deduction ($15,000 single / $30,000 married / $22,500 head of household in 2026), and then taxed at the applicable bracket rates. The resulting annual tax is divided by your number of pay periods.
2026 federal tax brackets
| Taxable Income (Single) | Rate |
|---|---|
| $0 – $11,925 | 10% |
| $11,926 – $48,475 | 12% |
| $48,476 – $103,350 | 22% |
| $103,351 – $197,300 | 24% |
| $197,301 – $250,525 | 32% |
| $250,526 – $626,350 | 35% |
| Over $626,350 | 37% |
FICA: Social Security & Medicare
FICA taxes are the same in every state. Social Security is withheld at 6.2% on wages up to $176,100 (2026 wage base). Once your wages reach that cap in a calendar year, Social Security withholding stops. Medicare is withheld at 1.45% with no wage cap. An additional 0.9% applies to wages above $200,000 (single) or $250,000 (married).
Montana state income tax details
Montana uses a progressive income tax, meaning higher income is taxed at higher rates. The calculator above applies Montana's exact 2026 bracket table to your annualized income and divides the result by your pay periods.
Pre-tax deductions and your paycheck
Traditional 401(k) contributions and employer-sponsored health insurance premiums (Section 125/cafeteria plan) reduce your federal and state taxable income, lowering your income tax withholding. However, 401(k) contributions do not reduce FICA (Social Security and Medicare) wages. Health insurance premiums under a Section 125 plan do reduce FICA wages. Use the "Show deductions" section above to model your specific situation.
Frequently asked questions
- Montana has a progressive state income tax. The rate depends on your income level — lower income is taxed at a lower rate, and higher income at a higher rate. Use the calculator above to see your exact withholding based on your salary and filing status.
- Montana does not have a statewide local income tax layer. Your paycheck deductions consist of federal income tax, Social Security, Medicare, and Montana state income tax — no additional local income taxes are withheld at the state level.
- Start with your gross pay per paycheck. Subtract: (1) federal income tax based on your filing status and 2026 brackets; (2) Social Security at 6.2% up to the $176,100 wage base; (3) Medicare at 1.45%; (4) Montana state income tax. Any pre-tax deductions like 401(k) or health insurance reduce your taxable income further. The calculator above does this math instantly.
- Montana's treatment of Social Security retirement benefits varies by income level. Check the Montana Department of Revenue for the current exemption thresholds. This calculator estimates withholding on wages — Social Security benefit taxation is a separate determination made on your annual return.
- Montana does not require additional state payroll contributions beyond state income tax withholding. Some states (notably California, New Jersey, and New York) require workers to contribute to state disability insurance (SDI) or paid family leave (PFL) programs — Montana is not one of them.
Last updated: January 2026 · Data source: IRS Publication 15-T (2026), Montana Department of Revenue · This tool is for estimation only.
Related guides
- How does paycheck withholding work? — Step-by-step explanation of federal withholding, FICA, and state tax calculation.
- W-4 withholding guide — How to fill out the redesigned W-4 and avoid under- or over-withholding.