United States
183-day threshold
183
Days to residency
rolling
Measurement period
182
Safe days per year
How the 183-day rule works in United States
The US uses the Substantial Presence Test: 31 days in the current year plus a weighted 183-day count over three years. Green card holders are always resident.
Rolling 12-month window. This means the count looks back from any given date, not just the calendar year boundary. A rolling window is harder to track manually because the number changes every day.
If you exceed 183 days, United States may tax your worldwide income as a tax resident. The exact consequences depend on your personal situation, any applicable tax treaties, and the type of income involved.
Track your days in United States
BorderLog counts your days automatically and warns you before you hit the 183-day threshold.
Add your first entryThis is not tax advice
Tax residency rules are complex and change frequently. This page provides general information only. Always consult a qualified tax professional for advice about your specific situation.