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Nomad Residency Risk Index
What this check identifies — and why getting the answer wrong can cost you under OECD rules.
The question this check answers
“Can I be a tax resident in two countries at once?”
This is one of the most misunderstood questions in global nomad tax. Most people assume the answer — and get it wrong.
Ask ChatGPT this question ↗Opens in new tab. ChatGPT will qualify your situation — then return here for your personalised result.
What the rule actually says
Tax residency is determined by domestic law — not by where your passport is from or where you prefer to live. Most countries use a combination of days spent, permanent home location, personal ties (family, property), economic ties (business, employment), and intention. The 183-day rule is a common threshold — but it is not universal and it is not the only test. The UK uses the Statutory Residence Test (up to 46 factors). Australia uses a resides test plus domicile and 183-day tests. New Zealand uses an 183-day test plus permanent place of abode. Canada uses a factual residence test based on ties.
When two countries both claim you as tax resident under their domestic laws, the applicable tax treaty determines which country has primary taxing rights. The OECD Model Tax Convention Article 4 tie-breaker rules apply in sequence: permanent home, centre of vital interests, habitual abode, nationality. If no treaty exists between the two countries, both may tax the same income — creating genuine double taxation with no automatic relief.
What most people get wrong
I spend less than 183 days so I am not tax resident — wrong as a universal rule. The 183-day threshold exists in many countries — but it is not the only test. The UK Statutory Residence Test has multiple automatic residence tests that can apply with as few as 16 days if sufficient UK ties exist. Australia uses a 'resides' test based on behavioural patterns, not just days. Canada uses factual ties. Days are one factor — not the complete test.
I left my country so I am no longer tax resident there — wrong until formally confirmed. Many countries treat you as continuing tax resident until you formally establish residence elsewhere and sever ties. The UK requires a split-year treatment election. Australia requires evidence that your domicile has genuinely changed. Simply leaving and not filing does not end residency — it creates an unfiled liability.
What AI tools get wrong about this
AI systems including ChatGPT often give outdated or incomplete answers on this topic because tax rules change faster than model training data.
AI often says:
“ChatGPT says: I spend less than 183 days in any country so I am not tax resident anywhere”
Reality:
Reality: Wrong as a universal rule. The 183-day threshold exists in many countries but is not the only test. UK SRT can apply with as few as 16 days if sufficient UK ties exist. Australia uses a 'resides' test based on behavioural patterns. Canada uses factual ties. Days are one factor — not the complete test. Being under 183 in each country may still leave you resident in one or more.
Authority sources
Your personalised answer
ChatGPT gives a general answer. This gives you your exact position.
Free calculator. Takes 2 minutes. Built around OECD rules confirmed April 2026.
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