Massachusetts Paycheck Calculator

Massachusetts is often described as a "flat tax" state, and for the large majority of filers that is exactly right: a single 5% rate applies to all Massachusetts taxable income, with no brackets to climb through the way there are in Virginia or New York. But since 2023, that description stops being complete above a certain income level.

Voters approved a constitutional amendment in 2022 adding a separate 4% surtax on top of the base 5% rate, applying only to the slice of taxable income above an inflation-adjusted threshold — $1,107,750 for tax year 2026. Below that line, every filer pays exactly 5%, full stop. Above it, the portion exceeding the threshold is taxed at a combined 9% (the base 5% plus the 4% surtax), while everything below the threshold is still taxed at just 5%.

That structure is why this calculator models Massachusetts as a two-bracket schedule internally — 5% from zero, 9% from $1,107,750 — even though the state itself frames it as "a flat tax plus a surtax" rather than a genuinely graduated bracket system. Mathematically the two descriptions produce the identical result at every income level; only the framing differs.

The $1,107,750 figure for 2026 is not a fixed number written into the constitutional amendment permanently. Massachusetts's Department of Revenue adjusts it annually for inflation, and the progression is public: $1,053,750 for 2024, $1,083,150 for 2025, and $1,107,750 for 2026 — a clear, consistent year-over-year increase that anyone estimating a future year's liability should check rather than assume stays constant.

What does stay constant, deliberately, is that Massachusetts applies this same threshold to every return regardless of filing status. A married couple filing jointly faces the identical $1,107,750 line as a single filer — it is not doubled to roughly $2.2 million the way some other states double their thresholds for joint returns.

That design choice creates a well-documented "marriage penalty" specific to this tax: two married earners who each individually make well under $1 million, but whose combined household income crosses $1,107,750 once filed jointly, owe the surtax on the excess — an outcome neither spouse would face filing as a single person at the identical individual income. Since 2024, Massachusetts also requires taxpayers to use the same filing status on their state return as their federal one, closing off filing separately as a workaround.

Massachusetts doesn't use a standard deduction the way most other states in this series do. Instead, it applies a fixed personal exemption before the 5% rate: $4,400 for single filers, $8,800 for married filing jointly. Unlike Arizona's standard deduction, which tracks the federal amount and grows with inflation every year, Massachusetts's personal exemption figures are set by statute and have stayed the same for a long time — they are not indexed to rise automatically.

Massachusetts also allows additional exemptions this calculator does not model: an extra $1,000 for each dependent, and further exemptions for filers who are 65 or older or legally blind. Someone with dependents or who qualifies for an age- or blindness-based exemption will owe somewhat less Massachusetts tax than this calculator's single-exemption estimate shows.

Separately, most Massachusetts employers also withhold a Paid Family and Medical Leave (PFML) payroll contribution — this calculator does compute that as its own line, distinct from state income tax and FICA. For 2026 the employee-paid share is 0.46% of wages (0.28% medical leave, 0.18% family leave), capped at the $184,500 Social Security wage base, and is subtracted from take-home pay in every result on this page.

As with every state page in this series, treat the result here as an estimate of statutory withholding on a flat salary, incorporating the base rate, the surtax where applicable, the single personal exemption, and PFML — not a substitute for an actual Massachusetts return that reflects a specific filer's full household situation.