Introduction

It usually starts with a phone call from the accountant.

You’ve sold an investment property, or you’re about to, and they’ve asked what the place was worth at some date in the past — the day you moved out and put tenants in, the day a parent passed away, or the day a title was transferred to a family member. So you do the sensible thing and ring the local agent who’s been dropping flyers in your letterbox. Within a day you’ve got a tidy one-pager with a price range on it.

Then the accountant looks at it and pulls a face.

It’s one of the most common questions in Australian property tax, and it’s a fair one: can you just use the agent’s appraisal, or do you need to pay for a professional property valuation? This article walks through what the ATO actually expects, when a valuation is required, and how much risk you’re carrying if you get it wrong.

Summary

There’s no law stopping you from using a real estate agent’s appraisal for capital gains tax. The ATO’s own guidance says the acceptability of a valuation generally depends on the process undertaken rather than who performed it, and general CGT isn’t one of the narrow situations where the law demands a professional valuer.

In practice, though, an agent’s appraisal is a marketing estimate. It’s typically a price range rather than a single figure, with no stated methodology, no adjusted comparable evidence, no purpose statement and no independence — because the agent is chasing the listing. The ATO expects a valuation that is objective, evidence-based, and detailed enough for another valuer to replicate. It also treats professional valuations as more credible, and offers penalty protection where you’ve properly engaged and instructed a qualified valuer.

Valuations are commonly needed when you first rent out a former home, when you inherit property, when you transfer to a related party or SMSF, when you subdivide, and when testing small business CGT concessions. If the relevant date has already passed, a retrospective valuation can still be prepared using historical sales evidence.

The practical test is simple: how much tax turns on this number, and could you defend it if the ATO asked you to? Small stakes and a straightforward property may justify an appraisal. Anything meaningful — a family home that’s doubled in value, a deceased estate, a family transfer — warrants a formal valuation. Bank valuations, council rates notices and online estimates don’t fill the gap either.

What the ATO Says About a CGT Valuation

This is where the confusion starts, because most people assume the ATO has a hard rule requiring a registered valuer. For general capital gains tax, it doesn’t.

The ATO’s guidance on market valuations for tax purposes makes the point that acceptability usually comes down to the process undertaken, not who did it — which is why having a defensible value matters for accurate property tax reporting. There are exceptions written into the law — the GST margin scheme requires a professional valuer, for instance — but CGT isn’t one of them.

So technically, yes, you can lodge using a figure that didn’t come from a valuer.

Why That’s Not the Whole Story

Read a little further and the picture changes. The ATO is equally clear that a valuation must be objective and supported by proper evidence, and that valuations done by professional valuers are considered more credible than those that aren’t. It expects a report another valuer could pick up, follow and replicate.

There’s one more line that matters more than most people realise. If you engage and properly instruct a professional valuer, you’re generally not liable for penalties if the ATO later finds the valuation was deficient. Lean on a document that was never meant to be a valuation and that protection isn’t there — the onus of producing a defensible number stays with you.

So the honest answer isn’t “you’re not allowed.” It’s “it probably won’t stand up, and you’re wearing the risk.”

Appraisal vs Valuation: The Actual Difference

These two words get used interchangeably at open homes, but in the property world they’re chalk and cheese.

What an Agent’s Appraisal Really Is

An agent’s appraisal is a marketing estimate. It’s free, takes about twenty minutes, and — let’s be honest — exists to win the listing. That’s not a knock on agents. A good local agent has a genuine feel for what’s selling in the street this weekend.

But look at what an appraisal usually contains:

A price range, not a single figure of market value
A handful of recent sales, generally without adjustment for land size, condition, aspect or improvements
No stated methodology
No inspection notes or measurements
No statement of the purpose it was prepared for
Often a forward-looking flavour — what the agent reckons they could achieve, which isn’t the same as market value
No independence, because there’s a commercial interest in the number

The range alone is a problem. If the appraisal says $780,000 to $840,000, which figure goes in the return? Whichever you pick, you can’t explain why.

What a Formal Valuation Is

A capital gains tax valuation is a formal, written assessment of market value at one specific date, prepared for a stated purpose, by a qualified and independent valuer. In Australia that generally means a Certified Practising Valuer (CPV) through the Australian Property Institute, and in states such as Queensland and Western Australia, valuers also work under a state registration or licensing regime.

A proper report sets out:

The exact valuation date and why that date is the relevant one
A detailed description of the property, improvements and condition as at that date
The methodology used, usually with a cross-check using a second approach
The comparable sales relied on, with adjustments explained
Any assumptions or limitations
The valuer’s qualifications, independence and signature

An appraisal gives you a number. A valuation gives you a number plus the reasoning that survives someone questioning it three years later.

When Do You Actually Need One?

Plenty of sales don’t need a valuation at all. Buy a unit in Newcastle for $520,000, sell it for $760,000, rented the whole way through — both figures are known and there’s nothing to value.

You need one when the law requires market value at a date when no sale actually happened.

Turning Your Home Into a Rental

This is the big one, and it catches the most people out.

If you first started using your main residence to produce income after 20 August 1996, the “home first used to produce income” rule can apply under section 118-192. Where it does, you’re treated as having acquired the property at its market value on the day you first rented it out — not what you paid years earlier.

Say you bought a weatherboard place in Geelong in 2014 for $410,000, lived in it, then moved to Melbourne for work in 2021 and rented it out. Your starting point for CGT isn’t $410,000. It’s whatever it was worth the day the tenants moved in.

Two things worth flagging:

Even if you plan to rely on the six-year absence rule, get the valuation done at the time. People go overseas thinking three years and stay eleven.
If you sell within twelve months of first renting it out, the 50% CGT discount isn’t available on that deemed acquisition.

Deceased Estates and Inherited Property

When someone passes away, the beneficiary’s cost base depends on when the deceased acquired the property and how it was used. In a range of cases, market value at the date of death is what matters — and that date has usually well and truly passed by the time anyone thinks to ask.

Executors often need a value to divide an estate fairly too, so one properly prepared report can do double duty.

Transfers to Family, Trusts or an SMSF

Transfer a property to a related party and the market value substitution rule generally treats the transaction as happening at market value regardless of what was actually paid. Selling the Blacktown investment property to your daughter for “what we owe on it” doesn’t make the tax go away.

These are non-arm’s-length transactions by definition — exactly the category the ATO looks at hardest.

Subdividing or Selling Part of a Property

Split a large block, sell the rear lot, and the original cost base has to be apportioned reasonably between the parts. That apportionment needs a defensible basis.

Small Business CGT Concessions

If you’re testing whether you fall under the maximum net asset value threshold, every asset value in that calculation needs to hold up. The difference between passing and failing the test can be enormous.

“But the Date Has Already Passed”

Here’s the part most people don’t know: a valuer can prepare a retrospective valuation — sometimes called backdated or historical — for a date in the past.

It’s done today, but assesses value as at that earlier date using sales evidence from that period, historical market data, council records, aerial and streetscape imagery, and evidence of what the property was actually like at the time.

This is also the clearest illustration of why an agent’s appraisal can’t do the job. Agents work in today’s market. Asking what a Toowoomba cottage was worth in March 2019, in a way that can be evidenced and defended, is a completely different exercise.

The further back the date, the more the evidence trail matters. Old photos, building reports, renovation invoices, a previous contract of sale — hang onto them and hand them over. They genuinely help.

What Can Go Wrong

Nobody’s suggesting every return gets reviewed. Most don’t. But if yours does, here’s the sequence.

The ATO questions the market value you used. You produce the agent’s appraisal. There’s no methodology, no adjustments, no purpose statement, and it’s a range rather than a figure. The ATO isn’t satisfied, obtains its own valuation, and amends your assessment.

Now you’re up for the tax shortfall, plus the general interest charge running from when the tax was originally due — and potentially a penalty, because the protection that comes with properly engaging a professional valuer isn’t available.

Against the cost of getting it done properly, that’s a poor trade. Arguing a historical value from scratch, years later, with no report, is worse than the money.

Is an Agent’s Appraisal Ever Enough?

To be fair — sometimes, maybe.

Where the tax at stake is small, the property is genuinely straightforward, the market was stable, and the appraisal is unusually well documented with real comparable evidence, some accountants will run with it. The ATO’s position that process matters more than job title leaves that door open.

The honest test is this: how much tax turns on this number, and could you defend it if someone asked?

A few thousand dollars of gain on a standard unit? Have the conversation with your accountant and make a call. A family home in a Sydney or Brisbane suburb that’s doubled in value, a deceased estate, a transfer to a trust, or anything where the number swings the tax by tens of thousands? The valuation is the cheap part of the exercise.

What a Good CGT Valuation Report Includes

If you do go ahead, make sure the report:

Is prepared by a qualified independent valuer — a CPV, registered or licensed where the state requires it
States the correct valuation date. This is where errors creep in: the date of death, not the date probate came through. The day the tenants moved in, not the settlement date of your next house.
States that it was prepared for capital gains tax purposes
Sets out methodology, comparable evidence and adjustments
Includes the valuer’s declaration of independence

A practical tip: tell the valuer up front what the report is for. A valuation prepared for bank lending or a family law matter isn’t automatically fit for tax. Purpose mismatch is one of the most common problems accountants run into.

Cost, Timing and Deductibility

Fees vary with property type, location, complexity and how far back the valuation date sits. A current-day valuation on a suburban house is a different job to a retrospective valuation on a rural holding from 2008. Any reputable firm will give you a fixed quote before starting, so ask.

Turnaround is usually measured in days rather than weeks once the inspection or research is done, but leave yourself room before your lodgement deadline.

Worth asking your accountant whether the fee is deductible as a cost of managing your tax affairs or forms part of your cost base — it depends on the circumstances.

FAQs

Does the ATO accept real estate agent appraisals for CGT?

There’s no outright ban, and ATO guidance says acceptability generally depends on the valuation process rather than who performed it. In practice, most agent appraisals lack the methodology, evidence and documentation the ATO expects, and professional valuations are treated as more credible.

Can I get a valuation for a date in the past?

Yes. Retrospective valuations are standard work for valuers. Market value is assessed as at the earlier date using historical sales evidence and records from that period.

What if I didn’t get a valuation when I first rented out my home?

You’re not stuck. A retrospective valuation can be prepared for the date you first started producing income from the property. The sooner the better, as evidence gets harder to assemble over time.

Can I use my council rates notice instead?

No. Council and state land valuations are prepared for rating and land tax on a mass-appraisal basis, usually value the land only, and don’t reflect market value of the improved property at your specific date.

Can I use the bank’s valuation from when I refinanced?

Generally not. Lender valuations are prepared for mortgage security purposes, often on a restricted basis, and are addressed to the bank rather than to you. The purpose doesn’t match, and the date rarely does either.

Do online property portal estimates count?

No. Automated estimates are algorithmic, carry wide confidence ranges, and have no professional opinion or methodology behind them. Fine for curiosity, not for a tax return.

Who should arrange it — me or my accountant?

Either. Many accountants prefer to instruct the valuer directly so the scope and valuation date are set correctly from the start. If you’re arranging it yourself, confirm the date with your accountant first.

Does it need a physical inspection?

For a current valuation, an inspection is standard. For retrospective work, the valuer assesses the property’s condition at the relevant date using inspection plus historical records, photos and documentation.

How long should I keep the report?

Keep it with your other CGT records for as long as you own the property and for at least five years after the sale, since the ATO can review your return well after lodgement.

Conclusion

An agent’s appraisal is a useful thing — it’s just not a CGT valuation and was never designed to be one. There’s no rule banning it, but there’s also no methodology, no independence and no penalty protection behind it.

If the tax at stake is small and the property is simple, talk to your accountant. If there’s real money riding on the number, a formal valuation is the difference between a figure you can defend and one you’re hoping nobody asks about.

Get in Touch

Registered Property Valuers prepares independent valuations for capital gains tax purposes, including retrospective valuations for past dates. If you’d like to know whether a valuation is warranted in your situation, or what it would involve, give us a call on +61 438 080 786 for a straightforward answer — no obligation either way.

Can I Use an Agent’s Appraisal for My CGT Valuation?

Introduction

Summary