Beyond CGT: The Other Times You Need a Retrospective Valuation

Most people meet retrospective valuations through capital gains tax: a value "as at" a past date, used to set the cost base. It is the most common reason we are asked for one — but it is far from the only one. A surprising share of the backdated valuations we do have nothing to do with tax at all. Here are the other situations where the date matters, and where getting it wrong is expensive.

A quick refresher

A retrospective valuation is the market value of a property as it stood on a specific past date — reconstructed from comparable sales around that date, with hindsight stripped out. We value with what was known then, not what happened after. (For the tax version, our CGT cost-base guide and the CGT calculator cover how the figure flows through.)

Family law and separation

When a relationship ends, the value of the home often has to be fixed as at a particular date — sometimes the date of separation, sometimes the date of a hearing or agreement, rather than today. The gap between separation and a final settlement can run to years, and markets move in that time. A value pinned to the agreed date keeps the split fair and defensible.

In practice we are often asked for two figures on the same property: a current value and a value as at separation. In a market that has moved — a Brisbane house through the recent run-up, a Sydney apartment off the 2021 peak — those two numbers can be materially different, and the difference is exactly what is being argued over. (See family court valuations.)

Deceased estates and probate

When someone passes, a great deal hinges on the property's market value as at the date of death. Probate needs it, and the beneficiaries inherit that figure as their CGT cost base for when they eventually sell. Get the date-of-death value right and the estate is settled cleanly; get it wrong and it surfaces years later, on the beneficiary's tax return. We reconstruct the market as it stood on that date, using sales from that period. (See deceased estate valuations.)

Insurance and loss events

When a property is damaged or destroyed — fire, flood, a major storm — or a claim is disputed, what matters is the value as at the date of the loss, not today's value and not simply the rebuild cost. Owners caught in events like the northern-rivers floods often need a defensible pre-loss figure to settle a claim, and that is a retrospective valuation by another name.

Disputes and litigation

Any time a past value is contested, a retrospective valuation becomes the evidence. Negligence claims against an adviser, partnership or company disputes, contested estates — they all turn on what a property was worth on a given day. These usually end up in front of a court, so the valuation has to hold up under scrutiny, prepared to an expert-witness standard rather than a quick appraisal.

What they all have in common

Whatever the reason, the same things make a retrospective valuation stand up — to the ATO, a court, an insurer or an auditor:

• the date stated clearly, and pinned to the right event;
• comparable evidence from that period, not today's sales;
• no hindsight — only what the market knew at the time;
• a qualified valuer (RICS and API standards) behind it.

The further back the date, the more we lean on archived sales records, and the more a volatile market at that moment matters: Sydney's 2017 peak, Perth's mid-2010s downturn, the sharp swings in mining towns. A steady Canberra street is easier to reconstruct than a market that turned that month.

If you need a value as at a past date — for a settlement, an estate, a claim or a dispute — the earlier you commission it relative to the date, the cleaner the evidence. But older dates are still very doable. You can request a quote or read more about our retrospective valuations.

---

Sources

• ATO — Market valuation for tax purposes
• Australian Property Institute — professional standards

Last verified 11 June 2026. This is general information, not legal, tax or financial advice; confirm what your situation requires with your solicitor, accountant or insurer.