Tax residency

The basics of tax residency, the 183-day rule and double-taxation treaties.

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. 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. 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.

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