also called day counting · day tracking · presence tracking
Keeping a precise record of days spent in each country to manage tax residency and visa limits.
Time-in-country tracking is keeping a precise record of how many days you spend in each country, so you can stay on top of tax residency and visa limits. It matters because both of those turn on day counts, and a handful of miscounted days can flip you into being tax resident somewhere or push you past what your visa allows. Disciplined tracking is what protects you on both fronts at once.
You keep a loose mental tally of your days in one country and figure you are well under the line. A recount at year-end shows a few trips you forgot to add, and those days are enough to tip you over a limit you were sure you had respected.
A handful of miscounted days can flip tax residency or breach a visa, so disciplined tracking protects both.
The difference is the whole point, so here is each one in a line.
These are the tests a single country uses to decide it can tax you, mostly by counting days.
The 183-day rule is the rough guideline that more than half a year makes you resident, and the 183-day myth is the mistaken belief that staying under it always keeps you safe.
The US substantial presence test, the UK Statutory Residence Test, and the US Physical Presence and Bona Fide Residence tests are formal versions, tax residency by day count vs ties names the underlying choice, time-in-country tracking is keeping the precise record, and residence is simply where you actually live.
183-day rule · Bona Fide Residence Test · Physical Presence Test · Substantial presence test
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