Self-Employed Tax Calculator — Montana (2026)
Self-employed in Montana? Your tax bill has three layers that a W-2 employee never sees in full: 15.3% self-employment tax on 92.35% of net profit, federal income tax, and Montana state income tax. This calculator applies all three to your 2026 net profit and shows the quarterly amount you should be setting aside. Montana uses a progressive income tax with 2 brackets running from 4.70% up to 5.90%, applied after a state standard deduction of $16,100.
Montana Self-Employed Tax Calculator
Gross 1099 income minus business expenses.
Self-employment tax vs Montana income tax
Self-employment tax is federal and identical in all 50 states: 12.4% Social Security up to $184,500 of net earnings plus 2.9% Medicare with no cap. Half of it is deductible against income tax, which is why the calculator subtracts it before applying brackets.
Montana then taxes essentially the same profit figure at 4.70%–5.90%. On $80,000 of net profit that adds roughly $3,191 to the bill.
Montana has no state sales tax — one of only five US states without a general sales tax.
Deductions that matter for Montana freelancers
Net profit — not gross revenue — drives every number here. Ordinary and necessary business expenses reduce SE tax, federal tax, and Montana tax simultaneously: the 2026 standard mileage rate of $0.67/mile, home-office square footage, software, equipment, professional insurance, and the self-employed health insurance deduction.
Retirement plans go further. A SEP-IRA or solo 401(k) reduces income tax (though not SE tax) and is often the largest single deduction available to a profitable energy contractor in Billings.
Working for yourself in Montana
Montana's economy leans on energy, agriculture, and tourism, which shapes the contractor market around Billings — and your fixed costs. With one-bedroom rent near $1,150, a freelancer needs meaningfully more gross revenue than an employee to reach the same lifestyle, because there is no employer paying half of FICA.
Montana consolidated its 7-bracket system to just two brackets (4.7% and 5.9%) in 2026 — paired with a federal-conforming standard deduction.
Local and payroll taxes Montana adds on top
Montana adds no state-mandated employee payroll deduction beyond FICA, so nothing extra is taken from your gross pay at the state level.
Montana has no state sales tax — one of only five US states without a general sales tax.
Nobody withholds these for you when you are self-employed in Montana. Local wage taxes, city business licences and gross-receipts style levies are yours to register for and remit alongside your quarterly federal and state estimates.
Working across a state line from Montana
Montana holds income-tax reciprocity agreements with North Dakota. If you commute between them, your wages are taxed only by your state of residence — file the exemption certificate with your employer so the wrong state is not withheld from every paycheck.
Remote and hybrid work complicates this further: most states tax income where the work is physically performed, so a Billings resident spending part of the year at a client site in Wyoming may owe a nonresident return there. Keep a day-count log if you split time between states.
The rest of your Montana tax bill
Montana charges no general sales tax, homeowners pay an average effective property tax of 0.74% of market value, and the minimum wage in force during 2026 is $10.85 an hour.
No general sales tax; some resort towns levy a local option tax.
Income tax is only one part of a state's take. Montana recovers revenue through sales and property tax as well, which is why headline income tax rates alone are a poor guide to how far a salary really goes. Montana taxes most retirement income, including Social Security above federal thresholds, with a modest subtraction at 65+.
Montana vs Wyoming on the same salary
On a $90,000 salary, a single filer keeps about $68,031 a year in Montana against roughly $72,145 in Wyoming — a difference of $4,114, or $343 a month.
Effective combined rates are 24.4% in Montana and 19.8% in Wyoming. Set that gap against living costs: index 102 here versus 96 there, with property tax at 0.74% and 0.61% respectively.
Montana income tax brackets 2026 (single filer)
| Taxable income | Rate |
|---|---|
| $0 – $20,500 | 4.70% |
| $20,500 and up | 5.90% |