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Australian Expat CGT Trap Auditor
What this check identifies — and why getting the answer wrong can cost you under ATO rules.
The question this check answers
“Do I pay CGT if I sell Australian assets while overseas?”
This is one of the most misunderstood questions in Australian 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
Australia's main residence CGT exemption — which exempts the gain on the sale of a person's principal place of abode from capital gains tax — is denied to foreign residents under section 118-115 of the Income Tax Assessment Act 1997, effective for contracts signed on or after 9 May 2017. The residency test applies at the date of the CGT event — which for a property sale is the date the contract is signed, not the date of settlement. A person who is non-resident when they sign a contract of sale loses the main residence exemption entirely — regardless of how long they lived in the property or when they left Australia.
The financial impact is substantial. A property purchased for $800,000 and sold for $1,600,000 produces an $800,000 capital gain. For an Australian resident who lived in the property, the main residence exemption can eliminate most or all of this gain. For a foreign resident selling the same property, the exemption is denied, the 50% CGT discount is unavailable, and the full $800,000 is taxed at non-resident marginal rates — up to 45%. The tax liability can exceed $360,000 on a gain that would have been largely tax-free under Australian residency. The 12.5% non-resident CGT withholding on the purchase price — $200,000 on a $1.6M sale — is also applied at settlement.
What most people get wrong
My home is tax-free because I lived in it — wrong if you are non-resident when you sell. The main residence CGT exemption is denied to foreign residents selling Australian residential property under section 118-115 of the ITAA 1997. The exemption depends on your residency status at the date you sign the contract of sale — not on whether the property was your home or how long you lived there. An expat who lived in a property for 10 years but signs the sale contract while overseas loses the exemption entirely.
Settlement date determines my CGT position — wrong. The CGT event for a property sale occurs at the date the contract is signed — not settlement. If you sign the contract while a foreign resident and settlement occurs after you return to Australia, the exemption is still denied. The residency test applies at the contract date. Planning the timing of contract signing relative to residency status can be the difference between exemption and full CGT.
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: My home is tax-free because I lived in it”
Reality:
Reality: Wrong if you are non-resident when you sell. The main residence CGT exemption is denied to foreign residents selling Australian residential property under section 118-115 of the ITAA 1997. The exemption depends on your residency status at the date you sign the contract of sale — not on whether the property was your home or how long you lived there. An expat who lived in a property for 10 years but signs the sale contract while overseas loses the exemption entirely.
Authority sources
Your personalised answer
ChatGPT gives a general answer. This gives you your exact position.
Free calculator. Takes 2 minutes. Built around ATO rules confirmed April 2026.
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