For more on how deductions change taxable wages, see our
pre-tax vs. post-tax deductions guide.
Massachusetts Paycheck Tax Calculator: How Massachusetts Withholding Works
A Massachusetts paycheck calculator has two state
lines to get right: the 5% income tax and the PFML contribution.
On your pay stub the tax usually appears as
SIT or MA state withholding
and the contribution as MA PFML, MA PFL or MA FLI. Our
pay stub abbreviations list
explains the other codes.
Federal Withholding for Massachusetts Paychecks
Federal withholding uses your Form W-4 and the 2026 federal
brackets. The calculator supports filing status, Step 2(c), Step 3
credits and Step 4(a), 4(b) and 4(c). If you claim the new overtime
or tips deductions, our
W-4 Step 4(b) worksheet guide
shows how to enter them, and our
2026 federal tax withholding guide
covers the rest.
Working Across State Lines
Massachusetts has no reciprocal agreements. Residents of
New Hampshire
and other states who work in Massachusetts have Massachusetts tax
withheld on those wages. Massachusetts residents who work in
another state pay that state's tax and take a credit on their
Massachusetts return; employers withhold Massachusetts tax only to
the extent it's more than the other state's.
Bonuses
Massachusetts withholds a flat 5% on supplemental wages like
bonuses when they're paid separately, plus federal withholding
(usually a flat 22%), FICA and PFML. See
why bonuses are taxed so high.
Employer Payroll Costs in Massachusetts
Employers pay state unemployment insurance
on the first $15,000 of each employee's wages, plus the employer
share of PFML at larger employers. None of the unemployment cost
comes out of your pay. At year-end, our
W-2 form generator
can use the same wage and withholding totals.
Why Your Actual Massachusetts Paycheck May Differ
This calculator is a close estimate, not your employer's payroll
run. Your M-4 on file, whether your employer uses the wage bracket
tables instead of the formula, how it splits PFML, benefit
elections, year-to-date wages and a 27th biweekly payday in some
years can all move the result a little.
Three-paycheck months
change monthly cash flow but not the tax on each check. For a full
checklist, see why your paycheck is lower than expected.
Official 2026 Massachusetts Payroll Sources
Payroll facts on this page are checked against
2026 Circular M,
the PFML contribution rates page,
the Massachusetts minimum wage law page
and IRS Publication 15-T for 2026.
Reviewed September 25, 2026.