Massachusetts state income tax
Last updated: 2026-04-27
TL;DR / ELI5
Primary form: Form 1
BasilTax engine: Yes — we calculate this state for you
Structure: bracket
Millionaire surtax on high earners.
Massachusetts income tax at a glance
This guide explains how Massachusetts fits into your overall filing picture. Your federal Form 1040 is only half the story—states add their own definitions, subtractions, credits, and withholding rules.
Most Massachusetts residents will prepare Form 1 alongside the federal return. Millionaire surtax on high earners.
Withholding and W-2 boxes
If you work in Massachusetts (or your employer withholds for Massachusetts), compare boxes 15–17 on your Form W-2 to what you expect on the state return. Mismatches here are a common source of balance due surprises.
Credits, deductions, and quirks
State returns often start from federal adjusted gross income (AGI) and then apply state-specific subtractions, additions, credits, and alternative minimum taxes. Read your state instructions for the exact list—this page is a hub, not a substitute for official guidance.
Verification workflow
Upload your PDFs, assign them to a return, and run compute. When BasilTax supports Massachusetts end-to-end, you can trace state lines to the same documents you used for federal. When support is still in progress, use BasilTax to lock down federal and broker schedules first, then complete Massachusetts manually with confidence.
Ready to tie every line to your documents?
Upload your W-2s and 1099s—BasilTax extracts fields, computes federal and state, and explains each number with citations.
Frequently asked questions
- Does Massachusetts have a state income tax?
- Yes—Massachusetts has a state income tax system described on Form 1. Millionaire surtax on high earners.
- What form do I file for Massachusetts?
- Most residents use Form 1 for the state return, subject to exceptions for part-year residents and special situations. Always confirm the latest state instructions each filing season.
- Does BasilTax calculate Massachusetts state tax?
- Yes—BasilTax includes Massachusetts rules in the computation engine so your state return can align with your federal return when you upload your documents.