Acceptable Valuation
Plenty of tax outcomes turn on a single question: what is an asset worth? When you sell something, the answer is usually easy, because there is a sale price. But tax law regularly requires a value where no sale has happened, and that is where a proper market valuation becomes essential.
The good news is that the Australian Taxation Office (ATO) does not insist on one rigid formula. It recognises that different assets are valued in different ways, and it sets out the approaches it accepts and the standards a valuation has to meet. This guide walks through both.
What “market value” actually means
The ATO defines market value as the estimated amount an asset would fetch on the open market at a particular point in time. Two ideas sit underneath that:
It reflects the most valuable use of the asset, which is not always how it is currently being used.
It assumes a willing buyer and a willing seller, both acting knowledgeably and at arm’s length, with neither under pressure to transact.
However, the precise definition can shift depending on the provision of tax law and the type of asset involved.
When you actually need a valuation
You need a market valuation when tax law requires a value and there is no arm’s-length sale price to rely on. Common triggers include:
Non-arm’s-length transactions, such as transferring property or shares between related parties or family members.
Starting to use a main residence to produce income, such as renting it out.
Employees receiving shares or options under an employee share scheme.
Small businesses testing asset thresholds for capital gains tax concessions.
Property developers applying the GST margin scheme, and businesses consolidating for income tax.
The common thread is that a number is required for tax, but the market has not handed you one. Something has to stand in for the sale price, and it has to be defensible.
The key valuation approaches
There is no single correct method. The ATO recognises a range of established valuation approaches, and the right one depends on the asset being valued. The main approaches are:
Market approach. Values the asset by reference to comparable transactions, or comparable assets that are actively traded. Works best where there is a genuine pool of similar sales to draw on.
Income approach. Values the asset by reference to the future economic benefits it is expected to produce, converted to a present-day figure. Suits assets whose worth lies in the income or proceeds they will generate over time.
Cost approach. Values the asset by reference to what it would cost to replace or reproduce it, adjusted for wear and obsolescence. Often used for specialised assets that rarely change hands.
Other approaches exist for particular assets and circumstances. The point the ATO makes is that the valuer must choose the approach best suited to the asset and the information available, not simply default to a familiar one.
Approaches versus methods
A useful distinction runs through the ATO’s guidance: an approach is the broad basis of valuation, while a method is the specific technique used to apply it. Within a single approach there are usually several methods to choose from.
The income approach is the clearest example. A valuer applying it might use a discounted cash flow method, which brings expected future proceeds back to a present value, or a capitalisation of earnings method, among others. Each is a legitimate way to apply the income approach; the valuer selects whichever best fits the asset and the reliability of the available information at the valuation date.
This is why two competent valuations of the same asset can look different on the page and both be sound. What matters is that the chosen approach and method genuinely fit the asset.
What a valuation report should include
A valuation is only as good as the report that records it. At a minimum, the ATO expects a valuation report to set out:
the purpose of the valuation;
the scope of the valuation;
details of the asset being valued;
the date the valuation was conducted, and whether it is a retrospective assessment;
the date of inspection, where one applies;
the records that explain the basis of the market value; and
the value itself.
Depending on what is being valued and when, a report may need more than this baseline. The guiding idea is that a reader should be able to follow how the conclusion was reached, not just see the final number.
What makes a valuation stand up
Choosing the right approach is only half of it. The ATO is just as concerned with how a valuation is produced and evidenced. A valuation that will survive scrutiny generally needs to be:
Objective and supportable. Backed by appropriate evidence, not assertion. The reasoning has to be visible.
Prepared by a professional valuer. A valuation from a qualified, professional valuer carries far more weight than one from someone who is not.
Genuinely independent. The valuer must be free to reach and write their own conclusions. Notably, the fee cannot depend on the outcome of the valuation.
Properly instructed. The person commissioning the valuation must set out the scope and purpose clearly, provide accurate information and access, and let the valuer form an independent view, usually documented in a letter of engagement.
Complete in its reporting. A report should record the purpose and scope, the asset, the valuation date, the evidence and basis for the value, and the value itself.
Documented and retained. The report and its supporting records need to be kept, so the valuation can be substantiated if the ATO later reviews it.
Independence and proper process are what makes a valuation worth relying on.
Where valuations go wrong
The ATO also publishes the problems it sees most often when it reviews valuations. They are worth knowing, because most are avoidable and each one weakens an otherwise reasonable figure:
The wrong methodology for the circumstances, or the right one applied poorly.
Assumptions and inputs that are not supported, including proxies borrowed from historical performance that no longer hold.
Comparable assets that are not truly comparable, chosen because they are convenient rather than relevant.
Discount rates or multiples with no clear basis for the size and risk adjustments behind them.
Reliance on information that only emerged after the valuation date, or on future events that could not reasonably have been foreseen at the time.
Thin documentation, so the reasoning cannot be followed or the result reproduced.
There is a practical reason to take these seriously. A valuation is more likely to be reviewed when the amount is large or the method is contentious, and in those cases the ATO expects deeper evidence and explanation. Doing your own valuation carries real risk of incorrect reporting and exposure to interest and penalties.
Specialised assets make it harder
The framework above is settled. Applying it becomes genuinely difficult when an asset is new, thinly traded, or valued at a moment before any sale occurs. There may be few comparable transactions to anchor a market approach, and the asset’s worth may sit almost entirely in uncertain future proceeds.
Biodiversity credits under the NSW Biodiversity Offsets Scheme are a specialised asset class, with many markets that trade rarely, and certain tax events fix the valuation date at the signing of a stewardship agreement, before any credit has been sold. That timing is the whole challenge. What is needed is the value as at that date, not a prediction of what a credit might eventually sell for. Valuing an asset for a future event is not accepted; the value has to belong to the date the law specifies.
This is where the income approach fits. A discounted cash flow assessment takes the proceeds a holding is expected to generate, weighs when and how reliably they might be realised, and brings them back to a present value at the valuation date. It answers the right question, what the agreement is worth at signing, rather than resting on a future sale price that may never eventuate. Applied to the specific mechanics of each credit market, it produces a figure that reflects real worth today rather than a headline nominal value.
That is the work we do at Speargrass: applying accepted valuation approaches to a market we track in detail, so the number reflects what an asset is really worth rather than a headline figure that may never be realised.
For how these principles apply to biodiversity credit valuations specifically, read our companion piece.
This guide is general information about the ATO’s published valuation framework, not tax advice. For tax advice specific to your circumstances, engage a qualified tax adviser and legal counsel.
