The 183-day rule is the most common statutory residency threshold in the US. Exceed it while maintaining a place of abode, and you may owe state income tax on your entire income — even if your domicile is elsewhere. This tracker helps you monitor your day count in real time.
How This Tracker Works
Select a state, enter how many days you've spent there so far this year, and optionally enter the date through which you've counted. The tracker shows:
- Visual gauge — a semicircle showing your days against the state's threshold
- Pace projection — at your current rate, how many days will you accumulate by December 31?
- Safe day budget — how many more days you can safely spend in the state, with a 10-day safety buffer
- Monthly budget — how to spread your remaining safe days across the months left in the year
Understanding the 183-Day Rule
The 183-day threshold is not a single, universal rule — it's a common number used by roughly 20 states, each with their own nuances. Key things to understand:
- 183 days is not a safe harbor. Staying under 183 days doesn't guarantee you won't be taxed. States can still claim you as a domiciliary resident based on your intent and connections, regardless of day count.
- Most states require an abode too. In states like New York, Connecticut, and New Jersey, statutory residency requires both 183+ days AND maintaining a permanent place of abode. Without the abode, the day count alone may not trigger residency.
- "Any part of a day" counts. In most states, being physically present for any amount of time — even a few hours — counts as a full day. A layover, a day trip, or stopping for dinner all count.
- Not all states use 183. Hawaii uses 200 days, North Dakota 210, Idaho 270. Some states like California use a factor-based test with a ~9 month guideline. Nine states have no income tax at all. Check your state's specific rules with our State Residency Rules Lookup.
Why a Safety Buffer Matters
This tracker includes a 10-day safety buffer in its "safe remaining days" calculation. Here's why:
- Travel days are easy to forget. A quick day trip, a layover, or a drive through the state all count. If you're not tracking automatically, you've likely undercounted.
- States count aggressively. New York counts any part of a day. If you arrive at 11:59 PM, that's one day. Leave at 12:01 AM the next day, that's two days.
- Auditors have access to data you don't. Cell phone tower records, credit card swipes, and toll records may show days you don't remember being in the state.
This tool provides estimates for educational purposes only. It is not tax advice. State tax rules vary and change frequently. Always consult a qualified tax professional for advice about your specific situation.