Montana Paycheck Calculator 2026

Montana Payroll Tax Overview

Montana uses a two-bracket state income tax. House Bill 337 cut the top marginal rate from 5.9% to 5.65% effective 1 January 2026 and widened the lower 4.7% bracket from about $21,100 to $47,500 of taxable income for a single filer. Because that first $47,500 is always taxed at 4.7%, your effective state rate stays well below 5.65% — and most Montana wage earners now pay 4.7% on every dollar they earn. Workers in Montana pay state income tax on top of federal income tax (10%–37%), Social Security (6.2%), and Medicare (1.45%).

The 2026 federal income tax brackets for single filers (IRS Rev. Proc. 2025-32): 10% on the first $12,400; 12% to $50,400; 22% to $105,700; 24% to $201,775; 32% to $256,225; 35% to $640,600; 37% above, applied after the $16,100 standard deduction ($32,200 married filing jointly). Pre-tax deductions (401k, health insurance, HSA) reduce your taxable income before both federal and state taxes are applied.

This calculator computes Montana tax bracket by bracket: Montana taxable income equals federal taxable income (your wages minus pre-tax deductions minus the federal standard deduction), taxed at 4.7% up to $47,500 ($71,250 head of household, $95,000 married filing jointly) and 5.65% above. It ignores credits such as the Montana EITC and does not model itemized deductions.

Federal vs Montana Tax Burden

For a Montana single filer earning $60,000 annually, 2026 federal income tax is about $5,020 (8.4% effective rate) after the $16,100 standard deduction, plus Montana state income tax of $2,063 (4.7% on $43,900 of taxable income, a 3.4% effective rate on gross), Social Security $3,720, and Medicare $870. Estimated annual take-home: about $48,327, or $1,859 biweekly.

States with graduated income tax rates like Montana apply higher rates only to income above each threshold — similar to how federal tax brackets work. Your effective state tax rate will be lower than the top 5.65% marginal rate unless nearly all your income falls in the top bracket.

To reduce your Montana paycheck tax burden, maximize pre-tax deductions: 401(k) contributions (up to $24,500 in 2026), HSA contributions (up to $4,400 for self-only coverage), and employer-sponsored health insurance premiums all lower both federal and state taxable income.

How to Use This Montana Paycheck Calculator

Enter your pay period (weekly, biweekly, semimonthly, monthly, or annual), then input either your annual gross salary or your hourly rate and average hours per week. Select your federal filing status — single, married filing jointly, married filing separately, or head of household — as this determines your federal tax brackets and standard deduction.

If you have pre-tax deductions such as a 401(k) contribution, health insurance premium, or HSA contribution, enter the total per-period dollar amount. These reduce your taxable income before federal and state taxes are calculated. The calculator will show federal income tax, Social Security (6.2%), Medicare (1.45%), Montana state income tax, your total deductions, and your net take-home pay — both per period and annualized. The Montana line applies the two 2026 brackets to your Montana taxable income, so it should match the two-bracket table further down this page.

Results are estimates based on standard assumptions and 2026 tax rates. Actual withholding may differ based on your W-4 elections, additional withholding, local taxes (in some cities), or retirement plan contribution limits. For precise payroll calculations, consult your payroll provider or a tax professional.

Montana 2026 State Tax Brackets & SB 121 Reform

Senate Bill 121 (2023) collapsed Montana to two brackets, and House Bill 337 changed both of them for 2026. Per the Montana Department of Revenue, from 1 January 2026 the top marginal rate falls from 5.9% to 5.65%, and the lower 4.7% bracket widens sharply: it now covers Montana taxable income up to $47,500 for single and married-filing-separately filers, $71,250 for head of household, and $95,000 for married filing jointly — up from roughly $21,100 and $42,200 under the old thresholds. HB 337 also raises the Montana earned income tax credit to 20% of the federal EITC from tax year 2026, and schedules a further top-rate cut to 5.4% in 2027. Montana starts from federal taxable income, so federal pre-tax deductions like 401(k), HSA and traditional IRA flow straight into Montana state tax savings. Note: Montana has NO state sales tax — payroll is the main state tax burden. Updated 2026-09-08.

What HB 337 Changes on Your 2026 Montana Paycheck

The rate cut is the headline, but the bracket widening is worth more to most workers. A single filer earning $50,000 of gross pay has about $33,900 of taxable income after the 2026 federal standard deduction of $16,100 — which sat above the old $21,100 threshold and so paid 5.9% on the excess, and now sits entirely inside the 4.7% band. That filer's Montana tax falls from roughly $1,818 to $1,593, a saving of about $225 a year, and none of it comes from the rate cut itself. Higher earners get both effects: at $80,000 of gross pay Montana tax drops from about $3,584 to $3,159. In practical terms, if your Montana taxable income is under $47,500 you are now a flat-4.7% taxpayer, and the 5.65% figure in the headline never touches your paycheck. Withholding tables were reissued to match — the Montana DOR published updated wage-withholding tables and a new Form MW-4 for 2026, so a paycheck that still reflects the old rate after January means your employer has not loaded them.

Paycheck Calculator Montana — No Sales Tax Impact on Real Take-Home

Montana is one of only five US states with no general sales tax (with Alaska, Delaware, New Hampshire, Oregon). This changes the "effective take-home" math versus states with income tax alone: a Montana worker paying at most 5.65% state income tax but 0% sales tax spends dollars more efficiently than a Washington or Tennessee worker paying 0% state income tax but 8.5-9.5% combined state+local sales tax. On a $60,000 household with $32,000 of taxable purchases per year, Montana's zero sales tax saves roughly $2,720 that a Washington household loses to sales tax — enough to offset most of Montana's income tax bite. Per Montana DoR, this is why per-capita net take-home in Bozeman, Missoula, and Billings is competitive with Seattle and Nashville despite the headline income-tax gap. Resort taxes (up to 3% in Whitefish, Big Sky, West Yellowstone) apply only to specific tourism goods — not general grocery/apparel/utilities.

Source: Montana Department of Revenue + Tax Foundation State Sales Tax data. Updated 2026-07-09.

2026 Montana Paycheck Calculator: Worked Examples by Salary

This Montana paycheck calculator uses the 2026 IRS federal brackets set by Rev. Proc. 2025-32 — a $16,100 single standard deduction and a 10% band to $12,400, 12% to $50,400, 22% to $105,700 — plus Montana's post-HB 337 brackets (4.7% to $47,500, then 5.65%).

$50,000 salary, single, biweekly, $0 pre-tax. Standard deduction $16,100 → taxable $33,900 → federal $3,820 + Montana $1,593 (all of it at 4.7%, because $33,900 is below the $47,500 threshold) + Social Security $3,100 + Medicare $725 = $9,238 total → net $40,762/year, or $1,568 biweekly.

$80,000 salary, single. Taxable $63,900 → federal $8,770 + Montana $3,159 (4.7% on the first $47,500 = $2,233, then 5.65% on the remaining $16,400 = $926) + SS $4,960 + Medicare $1,160 = $18,049 → net $61,951/year, or $2,383 biweekly.

$20/hour, 40 hours, 52 weeks = $41,600. Taxable $25,500 → federal $2,812 + Montana $1,199 + SS $2,579 + Medicare $603 = $7,193 → net $34,407/year, or $662/week.

Contributing 6% to a 401(k) on the $80,000 salary shelters $4,800, saving about $1,056 in federal tax (that income sits in the 22% band) and about $271 in Montana tax (it sits above $47,500, so it is taxed at 5.65%). The same 6% on the $50,000 salary saves about $360 federal and only $141 Montana, because those dollars are in the 4.7% band.

Montana Remote-Worker & Multi-State Tax Nexus Rules

Montana attracted an estimated 30,000+ net remote workers between 2020 and 2026 per Montana Department of Revenue filings — many keeping employment ties to Washington, California, or Texas employers. For Montana paycheck calculator users in that situation, three rules matter. First, a full-year Montana resident owes Montana tax on 100% of worldwide W-2 wages regardless of where the employer is headquartered — the employer's state doesn't affect Montana's claim. Second, if the out-of-state employer is not registered with Montana DoR for withholding, your paycheck arrives with zero Montana withholding, meaning you owe the full 4.7%/5.65% Montana tax at April filing plus quarterly estimated taxes if the balance exceeds $500. Third, if any workday is physically performed inside a source state (Washington business trip, California client visit), that state may claim nonresident withholding on those days — Montana then offers a credit for taxes paid to other states. The clean setup: quarterly estimated Montana payments (Form MT-EST) matching the paycheck calculator's estimate, keeping the balance due at filing under $500 to avoid underpayment penalty.

Updated 2026-07-17. Source: Montana Department of Revenue Publication 2 (Nonresidents and Part-Year Residents) + MT-EST Instructions.

Montana Paycheck vs Neighboring States at $75K

Montana workers considering a move across the border can compare take-home in seconds. For a $75,000 single filer with the 2026 federal standard deduction ($16,100) and $0 pre-tax deductions: Montana → federal $7,670 + MT state $2,877 (4.7% on the first $47,500, 5.65% on the remaining $11,400) + FICA $5,738 = $58,716 take-home. Wyoming (no state income tax) → $61,593 (+$2,877 vs MT). Idaho and North Dakota both tax wages, so their take-home falls between those two figures; run the Idaho and North Dakota paycheck calculators for the exact comparison. Wyoming is the biggest paycheck winner in the region, and Montana still beats high-tax coastal states by thousands of dollars per year on the same $75K.

Last updated 2026-07-09. Sources: Montana DoR, IRS Pub 15-T, Idaho State Tax Commission, North Dakota Tax Commissioner.

Montana State Tax by Taxable Income — Exact Two-Bracket Table

Montana tax is not a flat percentage of your salary, and that is where most online estimates drift. The two brackets apply to Montana taxable income — the figure after your federal standard or itemised deduction, not gross pay — so the arithmetic for 2026 is: 4.7% on the first $47,500 (single) or $95,000 (married filing jointly), then 5.65% on everything above. The table below is computed directly from that rule, so you can check any payroll estimate against it in a few seconds. Thresholds and rates are published by the Montana Department of Revenue under HB 337.

Notice the effective rate never reaches 5.65% — it only approaches it, because the first $47,500 is always taxed at 4.7%. Even at $150,000 of taxable income the effective Montana rate is 5.35%. Married filing jointly pays the lower rate on twice as much income, so a joint return owes a flat 4.7% all the way to $95,000: $2,350 on $50,000 of taxable income, against $2,374 for a single filer. Updated 2026-09-08 for HB 337.