TimeSync

183-Day Tax Residency Calculator

Track days spent per country and see how close you are to the 183-day tax residency threshold.

Spending more than 183 days in a country in one calendar year typically triggers tax residency — giving that country the right to tax your worldwide income, often retroactively to January 1.

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Not tax or legal advice. Tax residency rules vary by country, treaty, and personal situation. This tool tracks days only — consult a qualified cross-border tax professional before making decisions. About this tool.

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The 183-day rule explained

Many countries use 183 days as the threshold for determining tax residency. Spend more than 183 days in a calendar year in a given country and that country may claim the right to tax your worldwide income. The rule exists because it approximates a majority of the year — 183 out of 365 days is just over 50%.

Digital nomads and remote workers who split time across multiple countries need to track this carefully. Accidentally becoming a tax resident in a high-tax jurisdiction can have significant financial consequences that apply retroactively to the entire year.

Important caveats

  • This is not tax advice. Tax residency rules vary significantly by country and your personal situation. Consult a qualified tax professional before making decisions based on day counts alone.
  • Rules vary by country. Not all countries use 183 days. Some use 90 days, some use different tests entirely. Germany, for example, uses a combination of "habitual abode" and "domicile" tests that go beyond simple day counts.
  • Tie-breaker rules apply. Most tax treaties include tie-breaker provisions for dual-residency situations. If you meet the residency threshold in two countries simultaneously, a treaty may determine which country gets primary taxing rights.
  • Day counting methods differ. Some countries count partial days as full days; others do not count the day of arrival or departure. Verify the specific rules for each country you track.

183-day rule by country

CountryDay thresholdNotes
United States183 (weighted)Substantial Presence Test weights current year days + ⅓ prior year + ⅙ two years prior
United Kingdom183Also ties to 'sufficient ties' test if 16–182 days
Germany183Plus 'habitual abode' test — renting a flat may trigger residency even below 183 days
France183Or if France is 'center of economic interests'
Spain183Non-habitual resident regime available for qualifying newcomers
Canada183Sojourner rule: 183+ days = deemed resident for the full year
Australia183Resides in Australia test is primary; 183-day rule is secondary
Singapore183183+ days triggers tax residency; below 60 days may be exempt
UAEN/ANo income tax on individuals; residency visa required for most stays
Portugal183NHR regime offers flat 20% tax for qualifying residents for 10 years

Rules summarized for reference only. Tax laws change; verify with a local tax authority or cross-border tax professional before making decisions.

Schengen 90/180 Day Calculator →
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