Massachusetts 183-day rule and the Millionaire's Tax: residency for high earners
Massachusetts taxes residents at 5%, plus a 4% Millionaire's Tax surcharge above $1M. Here's how the 183-day rule and 'place of abode' test work for departing residents.
Massachusetts has a 5% flat income tax, and since 2023, a 4% surtax on income over $1 million. For people with $5M+ in annual income, MA effectively taxes the marginal dollar at 9%, twice what the headline rate suggests. For founders selling companies, executives exercising options, and athletes signing contracts, the move to Florida or New Hampshire pays for itself many times over, but only if you actually leave.
Massachusetts residency tests
Massachusetts treats you as a resident if either applies:
- Domicile-based: Massachusetts is your domicile, your true, fixed, and permanent home.
- Statutory residence: you maintain a permanent place of abode in MA AND spend more than 183 days there during the tax year.
Permanent place of abode in MA
A permanent place of abode is a dwelling place permanently maintained by the taxpayer, suitable for year-round use. The MA Department of Revenue applies the same general standard as NY: ownership isn't required, frequent use isn't required, and 'I never sleep there' isn't a defense by itself.
The Millionaire's Tax surcharge
Since 2023, Massachusetts imposes a 4% surtax on personal income above $1 million. Combined with the 5% base rate, that's 9% on the marginal dollar above $1M. The surtax applies to MA-resident income and to MA-source income for non-residents. So if you change your domicile but earn from a MA-headquartered employer or a MA partnership, you may still owe the surtax on MA-source income.
The MA surtax has driven a wave of departures since 2023. The DOR is well aware and has expanded its residency-audit program to match.
What counts as a MA day
- Any presence on a calendar day counts as a full day.
- Logan Airport (BOS) layovers may count if you cleared TSA from a Boston-origin flight.
- Driving I-95 through MA likely counts as a MA day.
- Travel days where MA was only a connecting point may be excluded, check the DOR guidance.
MA domicile-change checklist
If you're moving from MA to FL, NH, TX, or another no-income-tax state:
- Establish the new state's domicile with the full action checklist (license, voter registration, abode, ties).
- If keeping the MA home, recognize that abode + 184 MA days = statutory residence regardless of domicile.
- Move the family if possible, spouse and children location is heavily weighted.
- Update employer records to a non-MA office if applicable.
- Sever business interests where possible (LLC moves, board memberships).
- Track every MA day from the move date forward.
What MA audits look for
MA residency audits typically examine 1–3 prior tax years. The DOR will request travel records, credit card statements, cell phone bills, tolls (E-ZPass), and any documents showing MA presence. Expect particular scrutiny on departures within 12 months of a major liquidity event (sale of company, IPO, large bonus).
Track MA days from the move date
Tax Days tracks MA days, your new-state days, and any other state where you spend significant time. The exported PDF is the contemporaneous record an audit demands.
Frequently asked questions
What is the Massachusetts 183-day rule?
Massachusetts generally treats you as a statutory resident if you maintain a permanent place of abode in the state and spend more than 183 days there during the tax year. This applies regardless of where you are domiciled, so keeping a MA home and hitting 184 days can make you a resident even after moving elsewhere.
What is the Massachusetts Millionaire's Tax?
Since 2023, Massachusetts has imposed a 4% surtax on personal income above $1 million on top of the 5% flat rate, for 9% on the marginal dollar above $1M. It generally applies to residents' income and to MA-source income of non-residents, so changing domicile alone may not eliminate it if you still earn Massachusetts-source income.
What counts as a permanent place of abode in Massachusetts?
Generally, a dwelling place permanently maintained by the taxpayer and suitable for year-round use. Ownership is not required, frequent use is not required, and saying you never sleep there is typically not a defense by itself; the Massachusetts DOR applies roughly the same standard as New York.
What counts as a day in Massachusetts for the 183-day test?
Any presence in Massachusetts on a calendar day generally counts as a full day. Even a Logan Airport layover may count if you cleared TSA on a Boston-origin flight, and driving I-95 through the state likely counts, though travel days where Massachusetts was only a connecting point may be excluded under DOR guidance.
What do Massachusetts residency audits look for?
MA residency audits typically examine 1 to 3 prior tax years and request travel records, credit card statements, cell phone bills, and toll (E-ZPass) data showing Massachusetts presence. Departures within 12 months of a major liquidity event, such as a company sale, IPO, or large bonus, generally draw particular scrutiny.