What is the 183-day rule?
The 183-day rule is shorthand for the threshold at which most countries deem a person tax-resident: more than 183 days of presence within a given window (typically a calendar year or a rolling 12 months). Many countries layer additional tests on top, so 183 is a starting point, not a finish line.
Does this tool give tax advice?
No. It computes day totals against published thresholds. It does not apply secondary tests (centre of vital interests, habitual abode, prior-year carryover), and it is not a substitute for a qualified accountant in the relevant jurisdiction.
Which countries are supported?
15 jurisdictions are in the current dataset: Portugal, Spain, France, Germany, Italy, United Kingdom, Ireland, United States, Canada, Mexico, Indonesia, Thailand, Japan, Argentina, Croatia. We add jurisdictions on editorial demand — write to us if yours is missing.
How are the day counts computed?
Every stay you add contributes days within the selected rolling window (default 12 months). We sum all stays per country, then compare against that country's threshold. Days are inclusive of both arrival and departure dates.
What does 'Approaching' mean on the totals?
Approaching is flagged at 80% of a country's threshold (so 147 days against a 183 limit). It is a planning marker — not a legal trigger.
Is my data stored anywhere?
No. Your stays live in the URL only. Bookmark the page to save a scenario; share the URL to send it to your accountant or your future self. We do not store, log, or transmit any of it.