Many entrepreneurs believe that staying under 183 days in a country means they escape tax residency there. That is largely incorrect.
The 183-day rule is a domestic threshold. It exists, but it’s more nuanced than most people realize. It becomes irrelevant the moment two countries both claim you as a resident under their local laws.
When that happens, the tax treaty takes over. And the treaty overrides day counts.
What the treaty actually looks at:
Under the OECD Model Tax Convention (Article 4), residency is determined by a strict “tie-breaker” hierarchy.
It starts with Permanent Home.
- If you have a permanent home available to you in only one country, you are a resident there. End of story.
- But if you have homes in both countries (or neither), the test moves to the real deciding factor: Centre of Vital Interests.
The Centre of Vital Interests Test:
This is where the battle is usually lost. The authorities look at where your personal and economic relations are closer:
- Where your family (spouse/children) lives
- Where you perform your work and generate income
- Where your assets are located
- Where your social, political, and cultural ties are
Not just where you sleep most nights.
The bottom line:
Tax residency isn’t just about counting days; it’s about the depth of your roots. If your strategy relies solely on day counts while you maintain your life’s infrastructure in a high-tax country, you are vulnerable.
