Hello, We converted our PPOR to IP a couple of years ago and did not get a valuation at that point. We want to do a retrospective valuation to have a base value of the property at that time for CGT calculations in the future. We are not thinking of selling any time soon and was wondering how long would the retrospective valuation be valid for according to the ATO. Thanks
Hi @Sunshin3,
There's no set expiry date for a retrospective valuation. It will remain valid for as long as the valuation date it references remains the relevant date for your CGT calculation.
In your case, you converted your main residence to an investment property a couple of years ago. That conversion date is when the CGT cost base resets to market value. A retrospective valuation that properly values the property as at that specific conversion date will remain relevant whenever you eventually sell the property, whether that's in 5 years or 20 years.
The key is ensuring the valuation is objective and supportable. The valuation must be conducted by a professional valuer who has clear instructions about the date and purpose of the valuation. Your valuation report should include the purpose of the valuation, the date it was conducted, that it's a retrospective assessment, and records explaining the basis of the market value.
It's a one-and-done. If you have a valuation at a point in time from a licenced valuer, that's the value.
Hi @Sunshin3,
There's no set expiry date for a retrospective valuation. It will remain valid for as long as the valuation date it references remains the relevant date for your CGT calculation.
In your case, you converted your main residence to an investment property a couple of years ago. That conversion date is when the CGT cost base resets to market value. A retrospective valuation that properly values the property as at that specific conversion date will remain relevant whenever you eventually sell the property, whether that's in 5 years or 20 years.
The key is ensuring the valuation is objective and supportable. The valuation must be conducted by a professional valuer who has clear instructions about the date and purpose of the valuation. Your valuation report should include the purpose of the valuation, the date it was conducted, that it's a retrospective assessment, and records explaining the basis of the market value.
15 Apr 2026 · 4 min read time
15 Apr 2026 · 8 min read time
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