Residency Day Calculator
Pick a jurisdiction, enter how many days you've spent there this year, and see where you stand against its actual test. Remember: in most states, any part of a day counts as a full day.
What this doesn't capture
A calculator can tell you the arithmetic; it can't watch the calendar for you. It also can't tell you whether a state considers you to keep a "permanent place of abode," whether your domicile has genuinely moved, or how your planned trips change your year-end projection. That's the job DayLine does automatically, every day, on your phone.
Stop counting by hand
DayLine tracks which state you're in every day, automatically, against every rule on this site — and builds the audit-ready record that protects you. All on your iPhone. Free for 30 days.
General educational information, verified against statutes and administrative guidance at the time of writing — not tax, legal, or accounting advice. Consult a qualified tax professional about your situation. · All state rules · DayLine home