Self-Employed Tax Calculator — Massachusetts (2026)
Self-employed in Massachusetts? 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 Massachusetts state income tax. This calculator applies all three to your 2026 net profit and shows the quarterly amount you should be setting aside. Massachusetts uses a flat personal income tax of 5.00% applied to taxable income after a state standard deduction of $0.
Massachusetts Self-Employed Tax Calculator
Gross 1099 income minus business expenses.
Self-employment tax vs Massachusetts 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.
Massachusetts then taxes essentially the same profit figure at 5.00%. On $80,000 of net profit that adds roughly $3,717 to the bill.
Massachusetts has no separate city or county income tax, so the state figure above is the full sub-federal income tax you pay.
Deductions that matter for Massachusetts freelancers
Net profit — not gross revenue — drives every number here. Ordinary and necessary business expenses reduce SE tax, federal tax, and Massachusetts 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 biotech contractor in Boston.
Working for yourself in Massachusetts
Massachusetts's economy leans on biotech, education, and finance, which shapes the contractor market around Boston — and your fixed costs. With one-bedroom rent near $2,900, a freelancer needs meaningfully more gross revenue than an employee to reach the same lifestyle, because there is no employer paying half of FICA.
Massachusetts amended its constitution in 2022 to add a 4% 'millionaire surtax' on top of the flat 5% — creating a de facto progressive system above $1M.
Local and payroll taxes Massachusetts adds on top
Paid Family and Medical Leave takes about 0.46% of wages from the employee share. That deduction sits outside the federal and state income tax lines, so build it into your own budget on top of the numbers above.
Massachusetts has no separate city or county income tax, so the state figure above is the full sub-federal income tax you pay.
Nobody withholds these for you when you are self-employed in Massachusetts. 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 Massachusetts
Massachusetts has no income-tax reciprocity agreements, so if you live here and work across a state line you generally file a nonresident return in the work state and claim a credit at home to avoid double taxation.
Remote and hybrid work complicates this further: most states tax income where the work is physically performed, so a Boston resident spending part of the year at a client site in New Hampshire may owe a nonresident return there. Keep a day-count log if you split time between states.
The rest of your Massachusetts tax bill
Massachusetts charges a 6.25% state sales tax, homeowners pay an average effective property tax of 1.14% of market value, and the minimum wage in force during 2026 is $15.00 an hour.
6.25% statewide, with clothing under $175 exempt.
Income tax is only one part of a state's take. Massachusetts 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. Massachusetts exempts Social Security and public pensions; private pensions and 401(k) withdrawals are taxed at 5%.
Massachusetts vs New Hampshire on the same salary
On a $90,000 salary, a single filer keeps about $67,645 a year in Massachusetts against roughly $72,145 in New Hampshire — a difference of $4,500, or $375 a month.
Effective combined rates are 24.8% in Massachusetts and 19.8% in New Hampshire. Set that gap against living costs: index 148 here versus 109 there, with property tax at 1.14% and 1.93% respectively.
Massachusetts income tax brackets 2026 (single filer)
| Taxable income | Rate |
|---|---|
| $0 and up | 5.00% |