Two ways a state can call you a resident
Each of these five states has two independent routes to full-year residency:
- Domicile. Your domicile is your one true, permanent home, the place you intend to return to. If a state is your domicile, it generally taxes you as a resident regardless of how many days you spend there.
- Statutory residency. Even if you are domiciled elsewhere, a state can still treat you as a resident if you maintain a permanent place of abode there and spend more than 183 days in the state during the tax year.
The statutory route is the surprise for globally-mobile people: you can keep your domicile in a low-tax or foreign location and still be pulled into a high-tax state's net just by crossing the day count while keeping a home there.
The 183-day count is "more than 183", and a part-day usually counts
All five states use the same headline number: more than 183 days in the tax year. In practice that means 184 days or more triggers the test (New York's own guidance states it as "184 days or more").
The trap is how a day is measured. In all five states, any part of a day spent in the state generally counts as a full day — a lunch, a layover that leaves the terminal, an evening visit. So a "day" here means a calendar day on which you set foot in the state, not a full 24 hours of presence. There are narrow exceptions: Connecticut and Pennsylvania exclude days spent purely in transit to another destination, and most states make allowances for, say, days hospitalized.
A common misreading is that Pennsylvania's "midnight to midnight" phrasing means you must be present the whole day — it does not. It simply describes how a calendar day is bounded; presence for any part of that day still counts. Because the narrow exceptions differ by state, you cannot blindly reuse one state's day tally for another.
"Permanent place of abode" is doing the heavy lifting
The day count alone is not enough. You also have to maintain a permanent place of abode (PPA) — a dwelling suitable for year-round living that you keep on an ongoing basis, whether or not you own it. A home leased to or owned by your spouse can count.
What generally does not count: a vacation cottage used only seasonally, a hotel or motel room, military barracks, a dorm room, or a place kept only for a short, specific purpose. A dwelling lacking kitchen or bathing facilities, or one not usable in winter, typically fails too.
New York adds a duration element: the abode must be maintained for substantially all of the taxable year. Under New York's audit guidelines this has meant a period of more than 10 months (relaxed from the prior "more than 11 months" standard for tax years beginning in 2022). The other states focus on whether the abode is genuinely permanent rather than on a fixed month count, but the spirit is the same: a real, ongoing home, not a temporary perch.
How the five states line up
All five share the structure — not domiciled here + a permanent home here + more than 183 days here = resident — with state-specific wrinkles:
- New York: Framed as a permanent place of abode for substantially all of the year plus 184+ days. New York City applies its own parallel version (substitute "New York City" for "New York State"), so a NYC home plus the day count can make you a city resident on top of state tax.
- New Jersey: Not domiciled + PPA in NJ + more than 183 days = resident, with an exception for members of the Armed Forces.
- Connecticut: Not domiciled + PPA in CT + more than 183 days = statutory resident; days purely in transit are excluded from the count.
- Massachusetts: Resident if domiciled in MA, or not domiciled but maintaining a PPA in MA and spending more than 183 days (part-days included; active-duty Armed Forces days are excluded).
- Pennsylvania: Not domiciled + PPA in PA + more than 183 days (any part of a calendar day counts, pure transit excluded) = statutory resident. Note: someone domiciled in PA who simply keeps a permanent home there is already a resident — the 183-day test is the route for non-domiciliaries.
The escape hatch for people domiciled in these states
If one of these states is your domicile but you have genuinely moved your life elsewhere, leaving is not automatic — you usually have to break the day and home thresholds the other way.
New Jersey and Connecticut share a well-known three-part safe harbor for a domiciliary to be treated as a nonresident for the year. You must, for that entire year:
1. maintain no permanent place of abode in the state, and 2. maintain a permanent place of abode outside the state, and 3. spend no more than 30 days in the state.
Massachusetts and Pennsylvania also require a real, demonstrable change of domicile (intent plus action — moving your home, ties, and life). Until you have clearly established a new domicile, the old one sticks, and the burden of proof is on you.
How a day counter helps (and what it can't decide)
A precise, private day log is the part you can actually control. Knowing exactly how many days you have spent in each state — and how close you are to 184 — is the difference between managing the line and crossing it by accident.
A tracker like Countly counts your days per jurisdiction so the day-threshold question is answered with evidence, not memory. What it cannot decide for you are the judgment calls: whether your home qualifies as a permanent place of abode, where your domicile truly sits, and how a tax treaty or audit might treat a particular day.
This page is informational, not legal or tax advice. Rules, thresholds and counting methods change and turn on your specific facts. Always confirm with the relevant state tax authority or a qualified advisor before relying on a day count.