Pennsylvania 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 Pennsylvania, whichever state they treat as their own. You are a Pennsylvania resident if either of these applies:

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

The second route is mechanical, asking only whether a home was available and how many days you were present.

A permanent place of abode is a house, apartment, dwelling place or other residence capable of being maintained as a household for an indefinite period, whether the occupant owns it. What falls outside it is accommodation occupied only during a fixed or limited period for a particular purpose.

• A midnight-to-midnight rule is stricter than it sounds. Because a day out has to be a full day out, a late return or an early departure turns what feels like a day elsewhere into a Pennsylvania day.
• A posting with an end date is not a permanent abode. Accommodation occupied only for a fixed or limited period for a particular purpose falls outside the definition.
• Ownership is irrelevant. A dwelling capable of being maintained as a household for an indefinite period counts whether or not the occupant owns it.
• Philadelphia has its own tax. City wage and income taxes are decided separately from state residency and are not governed by this count.
• Two states can tax the same year as a resident year. Statutory residency here leaves your domicile elsewhere intact, with credits closing only part of the overlap.

A resident is taxed on income from all sources while a nonresident pays only on Pennsylvania-source income, so an error usually surfaces as out-of-state earnings never reported while another state taxed the same income. The Department charges interest from the original due date and adds penalties for filing late and for underpaying, with greater exposure where an understatement is treated as deliberate. Professional tax advice is strongly recommended in situations like this.

A rented house and a working year

You are domiciled in New Jersey, rent a house near Philadelphia on a rolling lease, and are in Pennsylvania most days. Both limbs hold, so you are a statutory resident.

Late returns that flip the day

You believe you spend about 175 days in Pennsylvania, but on roughly 20 evenings you cross back after midnight. Under the midnight-to-midnight rule those are Pennsylvania days, which pushes the count past the threshold.

An assignment with a fixed end

You take a nine-month posting and rent an apartment for exactly that period, spending around 200 days in the state. Accommodation held only for a fixed period for a particular purpose is not a permanent abode, so the route fails.

• Pennsylvania Department of Revenue — Determining residency
• Pennsylvania Code — 61 Pa. Code Section 101.3, domicile