Massachusetts charges 5% flat + 4% surtax >$1M state income tax. Use the w-4 withholding calculator pre-loaded with Massachusetts rates.
Open W-4 Withholding Calculator →Getting your W-4 right in Massachusetts is important because you need to coordinate federal withholding with Massachusetts's flat 5% state withholding. If your W-4 is set too conservatively, you lend the government an interest-free loan; too aggressively, and you face an underpayment penalty. This calculator helps you dial in the right federal withholding amount given your Massachusetts state tax situation.
Massachusetts levies a flat 5% state income tax on all taxable income regardless of how much you earn. This makes tax planning straightforward: for every additional dollar you earn, 5 cents goes to Massachusetts. Massachusetts does not impose local income taxes, so the 5% flat rate is the only state-level income tax you owe.
The table below shows what you actually keep at five salary levels in Massachusetts, accounting for federal tax, FICA, and Massachusetts's flat 5% state tax.
See how Massachusetts compares to other Northeast states. Each link takes you to the w-4 withholding calculator landing page for that state.
For a comprehensive breakdown of Massachusetts’s tax structure, salary comparisons, cost-of-living analysis, and more, visit the full Massachusetts take-home pay page.