Massachusetts Tax Residency Rules

Massachusetts State Tax Residency Overview

Whether an individual is a resident of Massachusetts for income tax purposes can have a material impact on their tax liability. A Massachusetts resident is generally subject to Massachusetts income tax on worldwide income, whereas a nonresident is taxed only on income derived from Massachusetts sources — wages earned in Massachusetts, income from Massachusetts businesses, and gains from Massachusetts real estate.

That distinction has grown substantially more significant since January 1, 2023, when Massachusetts began imposing an additional 4% income tax on taxable income exceeding $1 million per year under the Fair Share Amendment (Article 44 of the Massachusetts Constitution). Combined with the standard 5% flat rate, Massachusetts residents with income above $1 million face an effective state income tax rate of 9% — making residency status a critical tax planning consideration for high-income individuals.

Massachusetts applies a two-part residency test: the domicile test and the statutory residency test. An individual is a Massachusetts resident for income tax purposes if they meet either test during the taxable year.

Domicile Test

If your domicile is Massachusetts, you are a Massachusetts resident for income tax purposes — subject to the safe harbor exception described below. Your domicile is your permanent and primary home: the place you intend to return to after any absence, whether for work, vacation, military service, or any other purpose. You can have multiple residences — apartments, condos, vacation homes — but you can have only one domicile.

Your Massachusetts domicile does not change simply because you spend time elsewhere or acquire property in another state. It changes only when you physically move to a new location and form the genuine intent to make that new place your permanent home. Massachusetts Department of Revenue ("DOR") will look at all aspects of your life — where you work, where your family lives, where you maintain social and civic ties, where you keep your most valued possessions — to determine whether a true change of domicile has occurred. Filing a certificate of domicile or registering to vote in another state, standing alone, is not sufficient to change your Massachusetts domicile.

Factors Considered in Domicile Determinations

Massachusetts DOR evaluates the full picture of an individual's life when auditing a claimed change of domicile. Relevant factors include:

• Location of the primary residence and disposition of the former Massachusetts home (sold, rented, or retained);
• Where the individual is registered to vote and actually votes;
• State of issuance of driver's license and motor vehicle registrations;
• Location of bank accounts, particularly the most active checking account;
• Location of the individual's physicians, dentists, attorneys, and other professional advisors;
• Location of business activities and employment;
• Where the individual's spouse, children, and other immediate family members reside;
• Location of social, fraternal, country club, and religious memberships;
• Location of the individual's most valued or sentimental personal property;
• Address used for mail, financial accounts, and insurance policies; and
• Percentage of time physically present in Massachusetts versus the new claimed domicile.

No single factor is determinative. The weight given to each factor depends on the totality of the individual's circumstances. See 830 CMR 62.5A.1(2).

Safe Harbor Exception for Massachusetts Domiciliaries

A Massachusetts-domiciled individual is treated as a nonresident — and therefore not subject to Massachusetts income tax on worldwide income — for a tax year if all three of the following conditions are met:

• The individual maintained no permanent place of abode in Massachusetts at any time during the tax year;
• The individual maintained a permanent place of abode outside Massachusetts for the entire tax year; and
• The individual spent 30 days or less in Massachusetts during the tax year.

This safe harbor is narrow. Retaining even a small apartment or vacation property in Massachusetts for any part of the year disqualifies the individual from using it. See M.G.L. c. 62, § 1(f); 830 CMR 62.5A.1(3).

Statutory Residency Test

Massachusetts's residency rule is commonly referred to as the "183-day rule," but the actual threshold is more than 183 days — meaning 184 or more days spent in Massachusetts during the calendar year. Spending exactly 183 days keeps you a nonresident; 184 or more days triggers statutory resident status and subjects worldwide income to Massachusetts tax.

Even if your domicile is outside Massachusetts, you are treated as a Massachusetts resident for a tax year if:

• you maintained a permanent place of abode in Massachusetts for the entire taxable year; and
• you spent more than 183 days in Massachusetts during the taxable year.

Both conditions must be satisfied. A non-domiciliary who maintains a Massachusetts apartment but spends only 150 days there is not a statutory resident. Equally, a non-domiciliary who spends 200 days in Massachusetts but has no permanent place of abode there — staying solely in hotels, for example — is generally not a statutory resident. See M.G.L. c. 62, § 1(f).

Permanent Place of Abode

A "permanent place of abode" is a dwelling place of a permanent nature that the individual maintains, regardless of whether they own or lease it. Massachusetts regulations generally include a residence owned or leased by the individual's spouse. The key question is whether the dwelling is maintained on a permanent — rather than temporary or transient — basis and is suitable for year-round use.

The following are generally not considered permanent places of abode:

• A mere camp or cottage suitable and used only for seasonal vacations;
• A barracks or similar structure lacking facilities ordinarily found in a dwelling (cooking, bathing); and
• A hotel room or other temporary accommodation used only during short business visits.

Whether a particular property qualifies is a facts-and-circumstances inquiry. A vacation home that the taxpayer uses extensively, keeps furnished, and in which they store personal belongings is far more likely to constitute a permanent place of abode than one rented out to third parties for the majority of the year. See 830 CMR 62.5A.1(1).

The Massachusetts Millionaire Surtax

Effective for tax years beginning on or after January 1, 2023, Massachusetts imposes an additional 4% income tax on that portion of an individual's taxable income exceeding $1,000,000 in a calendar year. The $1 million threshold is adjusted annually for inflation.

The surtax applies to all income types subject to the standard Massachusetts income tax — wages, business income, capital gains, and interest and dividends. Combined with the standard 5% rate, a Massachusetts resident with $5 million in taxable income faces a blended state income tax rate of approximately 8.2%, and income earned dollar-for-dollar above the threshold is taxed at 9%.

For a Massachusetts resident earning $5 million in capital gains from a business sale, the incremental Massachusetts income tax compared to a Florida or Texas resident — who owe zero state income tax — exceeds $400,000 in a single year. That differential has made residency planning a priority for high-income individuals with ties to Massachusetts, and has correspondingly increased the scrutiny that Massachusetts DOR applies to individuals who claim to have changed their domicile.

Counting Days in Massachusetts

For purposes of the 183-day statutory residency test, any part of a day spent in Massachusetts counts as a full day in Massachusetts. You do not need to be present at your permanent place of abode for the day to count. Arriving in Boston late at night and departing the following morning counts as two days in Massachusetts.

However, presence in Massachusetts solely for the purpose of boarding a plane, train, ship, or bus for travel to a destination outside Massachusetts — or while traveling through Massachusetts to such a destination — may be disregarded for day-counting purposes. The burden of proof is on the taxpayer to demonstrate the travel-day exception applies, with contemporaneous documentation.

Burden of Proof and Record Keeping

The burden of proof in a Massachusetts residency audit falls on the taxpayer. Any individual domiciled outside Massachusetts who maintains a permanent place of abode in Massachusetts and claims nonresident status must keep — and make available for examination by DOR — adequate records to substantiate that they spent no more than 183 days in Massachusetts during the taxable year. See 830 CMR 62.5A.1(5).

Massachusetts DOR auditors are thorough. In practice, auditors subpoena or request:

• Cell phone carrier records showing towers and locations;
• Credit card and bank statements showing point-of-purchase locations;
• E-ZPass, FastLane, and other electronic toll records;
• Airline frequent flyer statements and boarding passes;
• Medical and dental appointment records;
• Club, gym, and country club check-in records; and
• Social media posts, photos, and check-ins.

Contemporaneous records — kept day by day as events occur — carry far more weight than reconstructed calendars prepared after the fact. Courts and tax tribunals have repeatedly found that reconstructed records, unsworn statements, and calendars with unexplained gaps are insufficient to meet the taxpayer's burden of proof.

Use the Domicile365 App to create a GPS-based, day-by-day log of your location that provides the kind of contemporaneous, objective documentation that holds up in a Massachusetts DOR examination.

Part-Year Residents

An individual who moves into or out of Massachusetts during the taxable year is generally treated as a part-year resident. A part-year resident is taxed as a Massachusetts resident for the portion of the year during which they were domiciled in Massachusetts, and as a nonresident for the remainder. Massachusetts uses a proration method to allocate income between the resident and nonresident periods. Individuals changing their Massachusetts domicile mid-year must be especially careful to document the precise date of domicile change, as that date determines which income is subject to Massachusetts worldwide taxation.

Conclusion

Massachusetts's combination of a meaningful income tax rate, the 2023 Millionaire Surtax, and an aggressive DOR audit program makes residency status one of the most consequential tax planning decisions for high-income individuals with Massachusetts ties. The rules are strict, the burden of proof falls on the taxpayer, and DOR has extensive tools to reconstruct where you actually were throughout the year.

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