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183-day rule calculator

Enter how many days you spent in a state and whether you keep a home there. The calculator applies the two-prong statutory-residency test and tells you where you stand. Everything runs in your browser.

Days present in the state this year You maintain a permanent place of abode in this state

How statutory residency works

A state can tax you as a full-year resident, on all of your income, under either of two independent tests: domicile (your one true permanent home) or statutory residency. The statutory test is mechanical and catches people who "moved" but kept ties. You are a statutory resident if both are true:

you maintain a permanent place of abode in the state (a home suitable for year-round use), and
you are present there more than 183 days in the year — so 184 or more triggers it; exactly 183 generally keeps you a nonresident.

Because the trigger is "more than 183," treat 183 as the last safe day, not the first unsafe one. And remember New York and several states count any part of a day as a full day.

Not tax advice. Residency rules and the definition of a "day" vary by state and are fact-specific. This tool checks the common two-prong test only. Confirm your situation with a qualified advisor.

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Not sure how many days you've actually spent there?

SpyglassBeacon counts your days in every state automatically and warns you before you cross the line.

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