Maine Tax Residency (183-day rule)

Key parameters
Threshold	183 days
Period / Window	Tax year (1 Jan – 31 Dec)
Counting	Any part of a day
Alternative	Domicile
Additional requirements	Permanent place of abode

This applies to anyone with a home available to them in Maine, whichever state they treat as their own. You are a Maine resident if either of these applies:

• Domicile — Maine is your permanent home, the place you intend to return to whenever you are away.
• Statutory residency — you are domiciled elsewhere but maintain a permanent place of abode in Maine and spend more than 183 days of the tax year in the state, unless you are serving in the armed forces.

Maine is unusually explicit about what does not count as an abode. A permanent place of abode is a house, apartment, dwelling place or other residence maintained as your home, owned or not — but it expressly excludes a seasonal camp or cottage used only for vacations, a hotel or motel room, and a dormitory room used by a student.

That list matters more here than in most states, because the seasonal-camp exclusion covers exactly the kind of property people keep in Maine. A summer place used only for vacations does not expose you to the day rule at all.

Maine also recognizes a class of safe harbor residents — people domiciled in Maine who are nevertheless not treated as resident individuals for income tax, on conditions set by the state.

• A summer camp is expressly excluded. A seasonal camp or cottage used only for vacations is not a permanent place of abode, which takes most Maine holiday property outside the rule.
• Hotels and dormitories do not count. Neither a hotel or motel room nor a student dormitory room satisfies the abode limb however long it is occupied.
• Ownership is irrelevant. A residence maintained as your home counts whether or not you own it.
• Armed forces service is excluded. Serving members are outside the statutory residency route.
• Domicile can survive with a safe harbor. Maine recognizes people who remain domiciled in the state but are not taxed as resident individuals, on conditions the state sets.

A resident is taxed on income from all sources while a nonresident pays only on Maine-source income, so an error usually surfaces as out-of-state earnings never reported while another state taxed the same income. Maine Revenue Services charges interest from the original due date and adds penalties for filing late and for underpaying, rising where an understatement is treated as more than an honest mistake. Professional tax advice is strongly recommended in situations like this.

A year-round house and a long stay

You are domiciled in Massachusetts, rent a year-round house in Portland, and spend around 220 days in Maine. Both limbs hold, so you are a statutory resident.

A vacation cottage used all summer

You own a seasonal cottage on the coast used only for vacations and spend about 190 days there across a long summer and autumn. The cottage is expressly excluded as an abode, so the statutory route does not attach.

A long stay in hotels

You spend 200 days in Maine on a rolling contract, living in motels booked week by week. A motel room is not a permanent place of abode, so the day count alone does not make you a resident.

• Maine Revised Statutes — Title 36, Section 5102, definitions
• Maine Revenue Services — Determining residency status