See the edge of tax residency on a calendar.
Aggregate days per country across the year. Surface the 183-day threshold, centre of vital interests, and social-security risk country by country.
183-Day Tax Residency Tracker
Spend 183 days in one country and you may be treated as a tax resident. Log how many days you've spent where, and move before you cross the line.
What is the 183-Day Rule?
Most countries consider you a tax resident if you spend 183 or more days there in a calendar year. As a tax resident, you may be required to file taxes and pay tax on your worldwide income in that country.
- The threshold varies by country (180, 182, or 183 days)
- Some countries use a rolling 12-month window instead of calendar year
- Tax treaties between countries may override this rule (tiebreaker provisions)
- Having a "habitual abode" or "center of vital interests" may also trigger tax residency
Tax Residency Status
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Notes for United States
The US uses the "Substantial Presence Test" which counts all days in the current year + 1/3 of the prior year + 1/6 of the year before that (must total ≥183). US citizens are taxed on worldwide income regardless of residency.
Essentials of the 183-day rule
- THRESHOLD183 days in a calendar year is the common threshold. Calculation methods vary (calendar year, rolling 12 months, aggregate).
- SPLITResidency can trigger below 183 days. Permanent home, centre of vital interests, family location — some countries decide on these regardless of days.
- TREATYDouble-tax treaties are the final backstop. Where two countries both claim residency, the tie-breaker rule picks one.
- SPECIALNomad-friendly regimes. Portugal NHR 2.0 (IFICI), Spain Beckham, Italy Impatriati — reduced rates for a fixed period after residency.
- EVIDENCEThe burden of proof is yours. Entry/exit stamps, leases, bank records, airline tickets — the tracker is a starting point.