Tax residency: frequently asked questions

Most states with an income tax treat you as a full resident — taxable on everything you earn, everywhere — if you spend more than a threshold number of days in the state (183 in most, 184 in New York) and maintain a permanent place of abode there. It's called statutory residency, and it applies even if your true home (your domicile) is somewhere else. Details in our complete guide to the 183-day rule.

In New York, Connecticut, and most statutory-residency states, yes — any part of a day in the state counts as a full day. Arriving at 11:40 p.m. counts. The main exceptions are days spent purely in transit between two out-of-state points and days confined to a medical facility. A few jurisdictions instead count where you were at a specific moment, like overnight; each state page says which method applies.

A dwelling you maintain that's suitable for year-round living — owned or rented, even a small apartment. It doesn't have to be in your name if you keep meaningful use of it. Seasonal camps unsuitable for winter, and mere access to someone else's home with no residential use of your own, generally don't count. In New York the abode must also be maintained for substantially all of the year — more than ten months under current guidance.

Ordinarily no — transient hotel stays don't make an abode. But a room or suite kept on a long-term arrangement, a corporate apartment held for you, or an extended-stay setup you effectively maintain can count. The label matters less than whether you maintain a dwelling you can use year-round.

Yes, and it's the expensive scenario the day count exists to prevent: one state as your domicile, another as your statutory residence. Both tax you as a resident. Credits for taxes paid to the other state relieve some of it, but the relief is often incomplete — especially on investment income, which both states may tax with no offsetting credit.

Florida will happily consider you a resident — it has no income tax and no test to pass. The real question is whether the state you left still considers you its resident, either because you never abandoned your domicile there or because you kept an abode and crossed its day threshold. That fight happens under the other state's rules, not Florida's. See the snowbird's guide.

Domicile is your one true home — the place you intend to return to. You have exactly one, and it changes only when you both establish a new home and abandon the old one. Residency for tax purposes is broader: states tax you as a resident if you're domiciled there or if you meet their statutory test (abode plus days). That's why moving your domicile alone doesn't always end your old state's claim.

Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming have no tax on wage income (Washington taxes high capital gains; New Hampshire's interest-and-dividends tax has been repealed). Moving to one doesn't end your old state's claim on you, though — that depends on beating the old state's domicile and day-count tests.

No — and that surprises people. California residency turns on whether you're in the state for other than a temporary or transitory purpose, judged on all your circumstances, with a presumption of residency if you spend more than nine months there. Staying under 183 days does not make you safe in California. See the California page.

In an audit, they subpoena and cross-reference: cell-phone tower records, credit- and debit-card transactions, E-ZPass and toll logs, flight manifests, building key-card and doorman records, and your own calendar and social media. They build a day-by-day grid of the year — and days no record can place anywhere are presumed to be in the taxing state. Our audit guide walks through the process.

The day you arrive and the day you leave both generally count in any-part-of-day states. Pure pass-through travel is the exception: driving across the state without stopping for personal business, or connecting through an airport, typically doesn't count. Once you leave the airport or stop for a meeting, the exception is gone.

Days abroad don't count as days in any state — but they don't automatically help either. Your old state can still claim you as a domiciliary resident while you travel, and auditors will still ask where those days were. For Puerto Rico's federal presence test, up to 30 international days a year can actually count as Puerto Rico days if you qualify — see the Act 60 guide.

For statutory residency, New York only counts you if the abode was maintained for "substantially all" of the year. That was long interpreted as more than eleven months; current guidance says more than ten. Acquire or give up the abode mid-year and the statutory test may not apply for that year at all — though domicile analysis still does.

Yes. New York City residents pay a city income tax on top of state tax, and the city applies the same two tests — domicile, and abode plus 184 days within the five boroughs. You can be a New York State resident but a city nonresident, or move within the state and still face a city day-count question. Yonkers has a parallel system. See the NYC page.

Generally three years from filing, extended to six in many states for large understatements, and unlimited where no return was filed — which matters, because a state that considers you a resident treats your missing resident return as never-filed. Keep day logs and evidence for at least the audit window.

Contemporaneous and third-party beats everything: an automatic location log, boarding passes, hotel folios, card transactions, tolls. Reconstructed calendars and after-the-fact affidavits carry little weight. One good record per disputed day usually ends the dispute for that day — which is why an automatic tracker with receipts attached, like DayLine, is the cheapest audit insurance there is.