Massachusetts taxes most personal income at a flat 5%, with a higher 8.5% rate on short-term capital gains and a 4% surtax on income above roughly $1 million. If your Massachusetts gross income tops $8,000 in a calendar year, you must file a state return, generally by April 15. The Massachusetts state income tax starts from your federal gross income, then applies state-specific additions, subtractions, and credits that often diverge from federal rules.
What Rate You Pay
Wages, salaries, interest, dividends, and long-term capital gains are taxed at 5%. Short-term capital gains — profits on assets held one year or less — are taxed at 8.5%.1Mass.gov. Massachusetts Tax Rates On large gains, the gap between those two rates adds up fast.
High earners face an added layer. The Fair Share Amendment, added to the state constitution in 2022, imposes a 4% surtax on the portion of annual taxable income above an inflation-adjusted threshold.2Ballotpedia. Massachusetts Question 1 (2022) For tax year 2025, the threshold is $1,083,150. Income above that figure is effectively taxed at 9% if it’s ordinary income and 12.5% if it’s a short-term capital gain.1Mass.gov. Massachusetts Tax Rates The Department of Revenue updates the threshold each year.
Who Has to File
Anyone with Massachusetts gross income over $8,000 in a calendar year must file a state return. The $8,000 figure is per person. There is no combined threshold for married couples, so if one spouse clears it, that spouse must file, and the couple can choose joint or separate filing from there.3Mass.gov. Personal Income Tax for Residents
Three categories apply:
- Full-year residents maintained a permanent home in Massachusetts for the entire year, or were domiciled elsewhere but spent more than 183 days in the state while keeping a place to live here.
- Part-year residents moved into or out of the state during the year, and must file if gross income during the Massachusetts portion of the year topped $8,000.4Massachusetts Department of Revenue. 2025 Form 1-NR/PY Instructions
- Non-residents live elsewhere but earned Massachusetts-source income, and must file if that income topped $8,000 or exceeded their prorated personal exemption, whichever is less.4Massachusetts Department of Revenue. 2025 Form 1-NR/PY Instructions
People who split time between states should watch the 183-day rule closely. Keeping a place to live in Massachusetts plus more than 183 days of presence can make you a full-year resident even if your true home is elsewhere.
When to File, and What an Extension Does
Massachusetts personal income tax returns for tax year 2025 are due on or before April 15, 2026.5Massachusetts Department of Revenue. Massachusetts DOR Tax Due Dates and Extensions A six-month extension pushes the filing deadline to October 15, 2026.6Mass.gov. File an Extension and Pay MA Personal Income, Fiduciary, or Partnership Tax
The extension buys time to file, not time to pay. You must have paid at least 80% of your total tax liability by April 15 through withholding, credits, or estimated payments for the extension to be valid.6Mass.gov. File an Extension and Pay MA Personal Income, Fiduciary, or Partnership Tax A payment is required; there are no zero-dollar extensions. And a federal extension does not extend your Massachusetts deadline — you have to file one with the state.5Massachusetts Department of Revenue. Massachusetts DOR Tax Due Dates and Extensions Extensions with a payment of $5,000 or more must be filed electronically, or you can be hit with a $100 penalty.
If you owe nothing and miss April 15 without filing an extension, the state grants an automatic extension to October 15.5Massachusetts Department of Revenue. Massachusetts DOR Tax Due Dates and Extensions If you owe and file late without a valid extension, the late-file penalty is 1% per month (or fraction of a month) on the unpaid balance, capped at 25%.7Mass.gov. Massachusetts Penalties and Interest Assessed by DOR Interest on underpayments compounds daily at a rate that changes quarterly and sits around 7% to 8% annually for early 2026.8Mass.gov. TIR 26-2
Quarterly Estimated Payments
If you earn income that isn’t subject to withholding — freelance pay, rental income, investment gains — and your expected tax on that income tops $400, Massachusetts requires quarterly estimated payments. For 2026, the due dates are April 15, June 16, September 15, and January 15, 2027. Missing or underpaying these triggers the same interest the state charges on late tax. The state’s estimated payment system is separate from the federal one, which catches a lot of new residents and new freelancers off guard.9Massachusetts Department of Revenue. Massachusetts DOR Estimated Tax Payments
Deductions and Credits That Lower Your Bill
Massachusetts has its own set of deductions and credits that don’t always track federal rules. The personal exemption reduces taxable income before anything else kicks in: $4,400 for single filers or married filing separately, $6,800 for head of household, and $8,800 for married filing jointly.10Mass.gov. Massachusetts Personal Income Tax Exemptions
Rent You Pay
If you rent your principal residence in Massachusetts, you can deduct 50% of the rent you paid, capped at $4,000. The cap is the same regardless of filing status. You’ll need your landlord’s name, address, and the annual rent total.11Mass.gov. Deductions on Rent Paid in Massachusetts
Commuter Costs
You can deduct public transit, highway toll, bikeshare, and bicycle purchase costs that exceed $150, up to $750 per person. Married couples filing jointly can each claim the $750, for a combined $1,500. Any employer reimbursement reduces the deduction dollar for dollar.12Mass.gov. Massachusetts Commuter Tax Deduction
Student Loan Interest
There are two separate deductions, and you can’t claim both on the same interest. One mirrors the federal deduction, worth up to $2,500 per year, with a phase-out that starts at $85,000 in modified adjusted gross income ($170,000 joint) for tax year 2025 and ends above $100,000 ($200,000 joint). The other is a Massachusetts-only deduction for undergraduate loan interest with no dollar cap and no income limit — but the loan must have been administered through the college’s financial aid office and used only for tuition and enrollment expenses.13Mass.gov. Massachusetts Education-Related Tax Deductions
529 Contributions
Contributions to a Massachusetts 529 plan (U.Fund or U.Plan) are deductible up to $1,000 for single filers or $2,000 for joint filers, limited to contributions made during the tax year by a Massachusetts resident.
Earned Income Tax Credit
The state EITC equals 40% of the federal credit. If you qualify federally, you automatically qualify for the state version with no separate application.14Mass.gov. Massachusetts Earned Income Tax Credit (EITC)
Senior Circuit Breaker
Residents age 65 or older who own or rent their primary home can claim this credit when property taxes (or 25% of rent paid) exceed 10% of total income. The maximum for tax year 2025 is $2,820, and the credit is refundable.15Mass.gov. Massachusetts Senior Circuit Breaker Tax Credit
How Retirement Income Is Taxed
Social Security benefits are completely exempt from Massachusetts income tax, no matter your income level.16Mass.gov. Differences Between MA and Federal Tax Law for Personal Income Government pensions — from the Commonwealth, its cities and towns, other state contributory plans, and federal contributory plans — are also exempt.17Mass.gov. Massachusetts Tax Information for Seniors and Retirees
Private accounts are different. 401(k) distributions are taxable to the same extent they’re taxable federally. Traditional IRA withdrawals are generally taxable, but Massachusetts excludes the portion representing contributions you already paid Massachusetts tax on, which avoids double taxation. Roth IRA distributions follow federal treatment: tax-free if the account has been open at least five years and you meet one of the qualifying conditions (age 59½, disability, death, or up to $10,000 of first-time homebuyer expense). Non-residents aren’t taxed on IRA distributions from Massachusetts.18Mass.gov. Tax Treatment of Non-Government Pensions in Massachusetts
The Massachusetts Health Insurance Penalty
Massachusetts has its own health insurance mandate, separate from federal rules. If you’re deemed able to afford coverage but don’t carry insurance meeting the state’s Minimum Creditable Coverage standard, you’ll owe a monthly tax penalty that scales with income. For tax year 2026, annual penalties range from no penalty at or below 150% of the Federal Poverty Level up to $2,532 for incomes above 400% FPL.19Mass.gov. TIR 26-1: Individual Mandate Penalties for Tax Year 2026
A coverage gap of 63 consecutive days or less (about three months) does not trigger a penalty. For married couples, each spouse’s penalty is calculated separately and added together. MassHealth, any Health Connector plan, Medicare Part A or B, TRICARE, and Massachusetts student health plans automatically meet the Minimum Creditable Coverage standard.20Massachusetts Health Connector. Minimum Creditable Coverage Your insurer sends Form MA 1099-HC as proof; keep it with your tax records.21Mass.gov. 1095-B and 1099-HC Tax Form
Filing Your Return
Full-year residents file Form 1. Part-year residents and non-residents file Form 1-NR/PY.4Massachusetts Department of Revenue. 2025 Form 1-NR/PY Instructions You’ll need your federal W-2s and any 1099s. Part-year filers should have precise residency dates to split income correctly, and renters claiming the deduction need their landlord’s name, address, and total rent paid.
E-filing through MassTaxConnect or approved commercial software is the fastest route. Refunds on e-filed returns with direct deposit take about four to six weeks. Paper returns run eight to ten weeks for direct deposit, with another week added for a mailed check.22Massachusetts.gov. Your Personal Income Tax Refund You can track refund status using the “Where’s My Refund?” tool on the Department of Revenue website.