The 183-day rule explained

The 183-day rule is the most common test for tax residency: spend more than 183 days in a country during the relevant period and it may treat you as a tax resident. How the days and the period are defined varies by country.

Which period the days are counted over

Many countries count days within a calendar year, but others use their own tax year or a rolling 12-month window. Because the period differs, the same trip can push you over the line in one country and not another — so it helps to track both a calendar-year and a rolling 12-month total.

Which days count

Rules differ on partial days, days of arrival and departure, and days in transit. Some countries count any day you are physically present; others have specific exclusions. When in doubt, count every day of presence and verify the local definition.

183 days is a threshold, not the whole test

Passing 183 days often makes you resident, but staying under it does not guarantee you are not. Countries also apply ties like a permanent home or centre of vital interests, and some have shorter or additional thresholds.

Daybound counts your days of presence per country over the calendar year and a rolling 12 months, so you can see when you approach a threshold. It does not determine tax residency — confirm the rules with a qualified tax professional. General information, not tax advice.

Frequently asked questions

Is the 183-day period always a calendar year?

No. Many countries use the calendar year, but some use a different tax year or a rolling 12-month window. Check the rule for each country.

Do arrival and departure days count toward 183?

It depends on the country. Some count every day of presence including partial days; others have exclusions. Count conservatively and verify locally.

If I stay under 183 days, am I safe from residency?

Not necessarily. Other tests such as a permanent home or centre of vital interests can still make you resident.

Track it automatically

Daybound detects your country by GPS, counts days per country and warns you before you hit the limit.

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More guides

Tax residency: what it is and why it matters Your tax residency decides which country can tax your income — often your worldwide income, not just what you earn locally. It usually depends on how much time you spend in a country, which is why counting your days matters. Double taxation and how tax treaties help If two countries both consider you a tax resident, you could face tax on the same income twice. Double tax treaties exist to prevent that, using tie-breaker rules to decide which country has the primary right to tax you.