INTRO:If you own property in Australia — whether you're a seasoned developer or a long-term investor — GST is almost certainly part of your financial picture. But the standard "10% of the sale price" rule isn't the whole story. The GST Margin Scheme is a powerful, often-misunderstood tool that can meaningfully reduce your tax liability. Here's what our team at Linix Accountants wants you to know.
1. Eligibility Is Inherited — Not Assumed
One of the biggest surprises for property owners is that eligibility for the margin scheme doesn't start fresh with each new owner — it follows the property. If you acquired real estate through a fully taxable supply where the margin scheme was not used, you are generally locked out of using it when you sell.
This means your purchasing decisions today can either preserve or permanently eliminate a significant tax-planning tool for the future. Before you settle on any property acquisition, it's worth asking: was the margin scheme applied in this transaction? If your vendor can't answer that, your accountant should be finding out.
2. Buyers Cannot Claim an Input Tax Credit
In a standard taxable property sale, a GST-registered buyer can recover the GST paid through an input tax credit (ITC). Under the margin scheme, that recovery is eliminated — entirely.
The ATO is clear: the purchaser is not entitled to an input tax credit for the acquisition, even if they are registered for GST. This has real consequences for cash flow modelling. The GST effectively becomes a sunk cost, reducing your internal rate of return and overall yield on the project. For buyers, this makes margin scheme transactions a point of negotiation — what the seller saves in tax, the buyer absorbs in higher effective cost.
Note also that these acquisitions are not reported at the standard G10 or G11 labels on your BAS. If you're unsure how to handle this, reach out to us before lodging.
3. The "Margin" Is Not Your Accounting Profit
This is where many property developers get caught out. In accounting terms, your profit is what's left after all costs. But the GST margin is calculated differently — it is simply the difference between your sale price and your original acquisition price (or an approved valuation).
The following costs do NOT reduce the margin for GST purposes:
- Development costs (site clearing, levelling, infrastructure)
- Construction costs (labour and materials)
- Stamp duty and incidental purchase costs
- Legal and registration fees
These costs are still deductible for income tax purposes — but conflating the two treatments is a common compliance error that attracts ATO attention. Always keep these calculations separate and documented.
💡 Linix Tip: Always model your GST margin separately from your project P&L. A project can appear profitable on paper while carrying an unexpectedly high GST liability if the margin calculation hasn't been properly stress-tested.
4. Subdivisions Now Have Legislative Certainty
If you're subdividing a large parcel into multiple lots, the question of how to apportion the margin across each new title used to sit in a grey area. The ATO allowed a proportionate approach as an administrative practice, but it lacked firm legal backing.
That has changed. Section 75-15 of the GST Act now expressly allows developers to use a corresponding proportion of an approved valuation or GST-inclusive market value to determine the margin for each subdivided interest. This legislative certainty matters enormously for staged subdivision projects — you can now plan with confidence rather than relying on administrative goodwill.
5. The Withholding Rate Changes to 7%
Under standard rules for new residential premises, a purchaser withholds 1/11th of the contract price and remits it to the ATO at settlement. When the margin scheme applies, a different rate is triggered: 7% of the total contract price.
This lower rate reflects the reality that GST is calculated on a narrower base — the margin, not the full price. For vendors, this means more capital available at settlement, which can be redirected into the next phase of a project immediately rather than waiting for an ATO refund cycle. It's a detail that's easy to overlook in contract preparation, but getting it wrong can create unnecessary complications for both parties.
BONUS: The Pre-2000 Valuation Concession
For long-term property holders, there's one more lever worth knowing. If you owned property before GST was introduced on 1 July 2000, you may be entitled to use the market value of the property at that date as the acquisition price for margin scheme purposes — rather than your original purchase price.
This effectively carves out all pre-GST capital growth from the GST calculation. For legacy portfolios, the savings can be substantial — provided the valuation is performed using an ATO-approved method. If you hold property from before 2000 and haven't reviewed this concession, it's worth a conversation with our team.
The Fine Print Is Where the Money Lives
The margin scheme is one of the ATO's high-focus areas, meaning errors attract scrutiny. One of the most avoidable mistakes is failing to have a written agreement in place before the sale is completed. The supplier and recipient must agree in writing to apply the scheme before the time of supply — without this, you can lose access to the scheme entirely.
Whether the margin scheme is right for your situation depends on the specifics: how you acquired the property, your buyer's GST registration status, your development timeline, and how you're structuring the transaction. These aren't decisions to make based on a general rule of thumb.
CTA:Ready to make sure your property transactions are structured correctly? Our property tax specialists at Linix Accountants work with developers, investors, and long-term holders across Australia to ensure GST obligations are managed strategically — not just compliantly.
📞 Book a consultation today → www.linixaccountants.com.au
This article is intended as general information only and does not constitute tax advice. Please consult a qualified adviser regarding your specific circumstances.
