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Does spending 183 days make me tax resident?

Spending 183 days can trigger or affect tax residence in some places, but it does not by itself answer every case. The applicable test, tax year, ties and treaty position can matter.

A 183-day count is often the first number travellers watch, but it is not a safe universal verdict. Tax-residence systems are set by the relevant jurisdiction. The UK, for example, uses a statutory test with automatic tests and sufficient ties, while the United States uses a current-year minimum plus a weighted three-year substantial-presence calculation.

The period may not be the calendar year

Before counting, identify the period the jurisdiction uses. A tax year can differ from the calendar year, and some rules look at more than one year. A total that looks comfortable on a phone calendar can be wrong if it uses the wrong start and end dates.

Days are not the only facts

Where you have a home, family, work or a tax home can affect a residency analysis. The relevance and weight of those ties depend on the rule. Treat a threshold as a reason to investigate early, not as proof that the rest of the facts no longer matter.

How Flags Tax helps

Flags Tax can help you maintain a private record of days and flag places that deserve review. It is an early-warning tool, not a tax-residency calculator or professional opinion. For the US case specifically, the free substantial presence test calculator shows the weighted three-year working in your browser. Read what the app does not determine before relying on a day total.

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