Updated 10 October 2026
There is no such thing as an ATO-approved valuer or a pre-approved valuation. The ATO assesses valuations after the fact against its Market valuation for tax purposes guidance: an independent, professionally prepared report, a recognised methodology, comparable sales evidence at the valuation date, and reasoning a third party can follow. Meet that standard and you also pick up the penalty safe harbour that comes with properly instructing a professional valuer.
At a glance
- The ATO does not pre-approve valuations or valuers; it tests whether a value is objective and supportable
- Market value follows Spencer v Commonwealth (1907): willing but not anxious parties, both fully informed
- A compliant report states the date, purpose, evidence, method and reasoning, signed by a qualified valuer
- A professional valuation supports the safe harbour against shortfall penalties
- Red flags: agent appraisals, undated figures, no comparable sales, no reasoning
In this guide
There is no approval, only assessment
Taxpayers routinely ask for an "ATO-approved valuation". The ATO does not pre-approve valuers, firms or reports. What it publishes is guidance on what it expects, and what it does is test the valuation you relied on if your return comes under review. ATO-compliant, properly understood, means a valuation built so that it survives that test: the reviewer can see who valued the asset, at what date, by what method, on what evidence, and why the conclusion follows.
The market value the law means
Australian tax law adopts the common law definition traced to Spencer v Commonwealth (1907): the price a willing but not anxious buyer would pay a willing but not anxious seller, both acting knowledgeably and at arm's length, at the valuation date. Every element does work. It is not the price you hoped for, not the insured value, not the council rating value, and not what a related party actually paid, which is exactly why the market value substitution rule sends so many transactions to a valuer in the first place.
What the report must contain
The ATO's guidance describes the anatomy of a defensible report. In substance:
- Purpose and scope. What the valuation is for (a CGT event, a transfer, the 1 July 2027 reset) and any limitations.
- The asset, precisely identified. Title particulars, land area, improvements, and the interest being valued.
- The valuation date, stated and honoured. If it is retrospective, the report says so and the evidence is drawn from that period, not from today's market.
- Methodology. For most property, direct comparison; for income-producing commercial assets, capitalisation or discounted cash flow alongside it, with the choice explained.
- The evidence. The comparable sales relied on, with the adjustments the valuer made and why.
- The reasoning and the conclusion. A number a stranger can trace from the evidence, not a number asserted.
- The valuer's identity, qualifications and signature.
Who signs it matters
The guidance is explicit that valuations undertaken by professional valuers are more credible than those prepared by anyone else. A Certified Property Valuer works under recognised valuation practice standards, carries professional indemnity obligations, and stakes a credential on every signature. An agent's appraisal, a bank's security assessment and an online estimate all fail the independence and methodology tests before the evidence is even examined; the full comparison is in agent appraisal vs valuation.
The penalty safe harbour
Shortfall penalties under section 284-90 of Schedule 1 to the Taxation Administration Act 1953 run at 25 per cent of the shortfall for lack of reasonable care, 50 per cent for recklessness and 75 per cent for intentional disregard. The guidance offers the shield: generally, a taxpayer who engages and properly instructs a professional valuer will not be liable to those penalties even if the ATO later concludes the valuation was deficient. The value can still be adjusted; the penalty exposure largely cannot.
Note
Properly instructed means honestly instructedThe safe harbour assumes the valuer was given accurate, complete information. Withhold the granny flat income, misstate the land area, or push the valuer toward a target figure, and the protection evaporates along with the report's credibility. Instruct straight, then let the evidence speak.
The same standard will apply to every 1 July 2027 reset valuation under the capital gains tax changes. Our CGT calculator shows why that figure is worth getting right.
Get a valuation built for review
Independent reports signed by a Chartered Accountant and Certified Property Valuer, methodology and comparable evidence documented. $297 residential, $595 commercial, incl GST, 24 to 48 hours, Australia-wide.
Start your orderHow it worksRed flags that sink valuations at review
- Evidence from the wrong period. A retrospective date supported by current sales is the commonest defect in DIY and appraisal-based figures.
- A conclusion with no visible reasoning. One page, one number, no comparables.
- Conflicted authorship. The selling agent, a family member, or the taxpayer themselves.
- A figure that conveniently matches the tax-optimal answer. Reviewers notice when every judgment call breaks the same way.
- Stale valuations recycled across years or purposes. A 2023 report does not evidence a 2026 value, and a mortgage valuation does not evidence a CGT value.
The compliance checklist
| Element | Test |
|---|---|
| Valuer | Independent professional valuer, qualifications stated, report signed |
| Date | Correct date for the CGT event, retrospective status disclosed |
| Definition | Market value on the willing buyer, willing seller basis |
| Method | Recognised methodology, choice explained |
| Evidence | Comparable sales from the valuation date, adjustments shown |
| Reasoning | A third party can follow evidence to conclusion |
| Instructions | Complete and accurate information supplied to the valuer |
| Records | Report retained with the CGT records for five years after the relevant assessment |
Every report we issue is built to that checklist, whether the date is today, a decade ago, or 1 July 2027. Details on the CGT valuation service page.
Common questions
What does the ATO require in a valuation?
An independent, professionally prepared report stating the purpose, the asset, the valuation date, a recognised methodology, the comparable sales evidence relied on, and reasoning that leads to the conclusion, consistent with its Market valuation for tax purposes guidance.
Is there such a thing as an ATO-approved valuer?
No. The ATO neither licenses nor pre-approves valuers or reports. It assesses the valuation you relied on if your return is reviewed, which is why the report's process and evidence, not any approval stamp, are what protect you.
Can my accountant or real estate agent do the valuation?
They can offer opinions, but the ATO treats valuations by professional valuers as more credible than anyone else's, and only a properly instructed professional valuation attracts the penalty safe harbour. For any material CGT figure, a Certified Property Valuer report is the defensible route.
How long do I need to keep the valuation?
Keep it with your CGT records. Records supporting a CGT calculation must generally be retained for five years after the assessment that relies on them, which for a cost base document can mean decades after the valuation date. Store it with the purchase and improvement records.
