Quick answer
The valuation date is set by the CGT event, not by convenience. An A1 disposal uses the contract date; a deceased estate uses the date of death; s118-192 uses the day a former home first produced income; market value substitution uses the date of the transfer. A technically sound report at the wrong effective date is worthless.
Why the date matters more than the number
A valuation is an opinion of market value at a single moment. Change the moment and you change the answer — sometimes by a great deal, because Australian property markets have moved sharply in several of the periods that CGT work reaches back into. A report dated correctly and reasoned transparently will usually be accepted even where the Commissioner would have picked a different figure. A report dated incorrectly is worthless no matter how good the analysis.
The date is a question of law, not valuation. Your accountant or tax agent determines it from the facts of the transaction; we value to the date we are instructed to use. If the instruction is unclear we will say so before we begin rather than produce a report to the wrong date.
Event-to-date reference table
The events below account for the overwhelming majority of valuation instructions we receive.
Common CGT events and their valuation dates
Four dating traps we see repeatedly
Each of these has cost a taxpayer an amended assessment in matters we have been asked to review after the fact.
- Using the contract date when the law calls for the settlement date, or the reverse. For a disposal, CGT event A1 happens at contract; but a market value substitution under s116-30 is tested at the time of the event, which is not always the same day money changed hands.
- Valuing at the date of probate rather than the date of death. Probate can be granted many months later, in a different market.
- Treating the date a tenant moved in as the first income-producing date when the property was advertised, available and genuinely income-producing earlier.
- Using a single valuation for a property that moved in and out of main residence status more than once. Each changeover may need its own effective date.
When one property needs several dates
Multi-date instructions are common and we quote them as one engagement rather than several. A property bought before 1985, rented from 1998, lived in from 2006 and sold last year may need three effective dates to support a defensible apportionment. Each date is researched separately, because the comparable sales evidence for 1998 has nothing to do with the evidence for 2006.
Tell us every date you think may be relevant at the quote stage. Adding a date later means a second evidence search and a supplementary report; including it up front usually costs very little more.
Questions we are asked about this
Who decides the valuation date — the valuer or the accountant?
The accountant or tax agent. The date is a legal question determined by the facts of the CGT event; the valuer values to the date they are instructed to use. We will flag an instruction that looks inconsistent with the stated purpose, but we do not give tax advice.
Can one report cover more than one date?
Yes, and it is usually cheaper than separate reports. Each date requires its own comparable sales research, so tell us all the dates you need at the quote stage.
What if the exact date is unknown?
We can work to a month or a quarter where the evidence supports it, and the report will state the assumption plainly. An acknowledged assumption is far safer than a false precision the file cannot support.
Keep reading
Sources
- Income Tax Assessment Act 1997 — Consolidated Act, AustLII
- Market valuation for tax purposes — Australian Taxation Office — the eight valuation fundamentals
- Australian Property Institute — Professional Practice Standards and the CPV designation
This page is general information about how valuations are used for tax purposes. It is not tax advice. Your accountant or tax agent should confirm which provision applies to your circumstances.
Written and reviewed by
Jarrad Khoury
Head of Valuations at Asset Valuations Group, where he leads the Business Valuation Services division. Over 10 years in property and business valuation. Registered Valuer in Queensland (Not Limited), Licensed Valuer in Western Australia (Not Limited), CPV through the Australian Property Institute (Not Limited), CPV and CBV through the Australian Valuers Institute, and Registered Business Valuer through the AIBB.
Last reviewed 15 September 2026 · About the practice · Editorial policy