The GST margin scheme is one of the least understood mechanisms in Australian property, and one of the most consequential at the contract stage. For developers, subdividers and buyers of land and new commercial premises, the difference between a sale taxed in the ordinary way and a sale taxed under the margin scheme can move the GST liability by tens of thousands of dollars. Yet the choice is often made in a single clause, signed before settlement, and is effectively irreversible afterwards.
At its core, the margin scheme is a method of calculating Goods and Services Tax on a taxable supply of real property. Instead of charging 10 per cent GST on the full sale price, an eligible seller charges GST only on the margin — broadly, the sale price less what the seller originally paid for the property (or an approved valuation in certain cases). It exists because property frequently changes hands multiple times, and applying full GST at every sale would compound the tax in a way the system was never designed to do.
This article explains how the scheme works, who can use it, the traps that disqualify it, and the single point every buyer must check in the contract. It is general information only and is not tax or legal advice. The GST treatment of any specific transaction turns on facts that only a registered tax adviser, working from the actual contract and the property’s history, can confirm.
The margin scheme does not save the seller GST so much as it changes who ultimately bears it — and it almost always means the buyer walks away with no input tax credit to claim.
How GST normally applies to property
To understand the margin scheme, it helps to be clear on the default position. GST applies to a taxable supply: a sale made in the course of an enterprise, by an entity registered (or required to be registered) for GST, that is connected with Australia and is not input-taxed or GST-free. Most sales of new residential premises, commercial premises and vacant land sold by a developer or business fall into this category.
Where a sale is a standard taxable supply, GST of one-eleventh of the price is remitted to the Australian Taxation Office, and a registered buyer who is acquiring the property for a creditable (business) purpose can generally claim that GST back as an input tax credit. Two important exceptions sit outside this: the sale of an existing tenanted commercial property can often proceed as a GST-free going concern, and established residential property is input-taxed (no GST charged, no credits claimable). The broader mechanics are covered in our guide to GST on commercial property in Australia.
1 What the margin scheme actually does
The margin scheme, found in Division 75 of the A New Tax System (Goods and Services Tax) Act 1999, offers an alternative way to calculate the GST payable on an eligible taxable supply of real property. Rather than 10 per cent of the full price, the GST is one-eleventh of the margin.
The margin is generally the difference between the price for which the property is sold and the consideration the seller paid to acquire it. In some situations — most commonly where the property was held before 1 July 2000, or acquired from an associate or in certain non-arm’s-length circumstances — an approved valuation as at a specified date is used instead of the historical purchase price.
A simplified illustration
The numbers below are illustrative only and ignore acquisition and selling costs and other adjustments. They show the mechanism, not a real transaction.
| Item | Standard GST | Margin scheme |
|---|---|---|
| Seller’s original purchase price | $600,000 | $600,000 |
| Sale price | $1,000,000 | $1,000,000 |
| Amount GST is calculated on | $1,000,000 (full price) | $400,000 (the margin) |
| GST payable (1/11th) | ~$90,909 | ~$36,364 |
| Input tax credit available to buyer | Yes (if registered, creditable use) | No |
The seller’s GST bill is plainly lower under the margin scheme. The catch sits in the bottom row, and it is the single most important consequence of the whole regime.
2 Why the buyer gets no input tax credit
When a property is sold under the margin scheme, the buyer cannot claim an input tax credit on the acquisition — even if the buyer is GST-registered and acquiring the property for a fully creditable purpose. This is a deliberate feature, not an oversight: because the seller only paid GST on the margin, allowing the buyer a full credit would create a tax leakage.
The implication runs both ways and depends on who the buyer is:
- For a GST-registered buyer with creditable use (for example, a developer buying land to build new stock, or a business buying commercial premises for its enterprise), the margin scheme is usually worse, because they forgo a credit they would otherwise have received under a standard taxable sale.
- For a buyer who could not claim a credit anyway — an owner-occupier of a new home, or an investor in input-taxed residential property — the margin scheme can be better, because the lower embedded GST tends to support a lower price.
This is why the margin scheme is so common on new residential developments sold to the public, and why a savvy commercial buyer should pause before accepting it. The interaction with the buyer’s GST position is a core part of any sound commercial property due diligence exercise.
3 Eligibility and the agreement-in-writing rule
The margin scheme is not automatic. Two gateways must be cleared.
The property must be eligible
You generally cannot apply the margin scheme if you originally acquired the property through a sale that was fully taxable and on which the margin scheme was not used — in other words, where you (or a relevant earlier owner) were entitled to a full input tax credit on the way in. This “tainting” rule is the most common eligibility trap: a developer who bought a site as a standard taxable supply, claimed the GST credit, and then tries to on-sell finished lots under the margin scheme will usually find the scheme is not available. Eligibility can also be affected if the property was acquired from an associate, inherited, or obtained as a GST-free going concern, each of which has specific rules.
The parties must agree in writing before settlement
Even where a property is eligible, the margin scheme can only apply if the buyer and seller agree in writing that it will be used, on or before the day the sale settles. This is a hard statutory requirement. There is no retrospective fix — if the agreement is not documented by settlement, the opportunity is gone and the sale falls back to standard GST treatment. In practice the agreement is recorded as a clause in the contract of sale, which is why the contract review stage is where this issue lives or dies.
- Check the GST clause early. Identify whether the contract states the price is plus GST, inclusive of GST, a going concern, or subject to the margin scheme.
- Confirm eligibility, not just intention. A clause electing the margin scheme is worthless if the property is not in fact eligible.
- Get it advised before exchange. The election interacts with price, your credit position and your own future on-sale.
4 Why developers and subdividers care
The margin scheme matters most to those who create new supplies: developers building units, builders constructing new homes, and landowners subdividing and selling lots. For these sellers, the scheme can materially improve project feasibility, because GST is one of the largest single line items on a development’s cost stack.
Consider a subdivision. Where the underlying land was held for many years (and especially if acquired before 1 July 2000), the margin — sale price less an approved valuation or historical cost — may be far smaller than the gross sale proceeds, sharply reducing GST. The scheme can be applied lot by lot, and the original acquisition cost is apportioned across the lots on a fair and reasonable basis. This is why feasibility models for residential land subdivisions and apartment projects almost always assume the margin scheme where it is available.
There is a knock-on effect down the chain. Because a margin-scheme buyer cannot claim a credit, that buyer’s own future sale — if they too sell under the margin scheme — uses their purchase price as the base, preserving the structure across multiple sales. Developers buying input land therefore need to know, before they commit, whether the vendor sold to them under the margin scheme, because it shapes the GST on everything they build and sell afterwards.
5 How it interacts with other costs and taxes
GST is only one layer of the transaction. The margin scheme intersects with several others, and a buyer should never view it in isolation.
- Stamp duty. Transfer duty is generally calculated on the GST-inclusive price. Because a margin-scheme sale can be priced differently, the duty outcome can shift. The state-by-state mechanics sit in our commercial stamp duty guide.
- Income tax and CGT. Whether a profit is ordinary income (for a developer or trader) or a capital gain (for a passive investor) is a separate question entirely, with its own rules covered in our note on capital gains tax on commercial property.
- GST withholding on new residential. A separate regime requires buyers of new residential premises and potential residential land to withhold an amount at settlement and remit it directly to the ATO. The withholding rate differs depending on whether the margin scheme applies, so the two regimes must be read together.
- SMSF purchases. Funds buying commercial property, often via a limited recourse borrowing arrangement, have their own GST registration and credit considerations — see SMSF commercial property and LRBAs.
6 What buyers must check in the contract
For a buyer — particularly a GST-registered investor or developer — the margin scheme is a clause to interrogate, not to wave through. A checklist of practical questions:
- Is the margin scheme proposed at all? Read the GST clause and the special conditions. Vendors frequently nominate it as the default.
- Can I claim a credit if it does not apply? If you are registered and the purchase is for a creditable purpose, a standard taxable sale that lets you recover the GST may be more valuable than a margin-scheme price.
- Is the property genuinely eligible? Ask for the property’s GST history. Eligibility can be lost by the way the vendor acquired it.
- Will my own future sale be constrained? Buying under the margin scheme can lock the structure in for when you on-sell.
- Is the written agreement in place before settlement? Confirm the election is documented and dated correctly, because it cannot be added afterwards.
These questions belong at the same table as covenant, lease and title review. New investors building their first transaction framework will find the wider context in our guide to commercial property for beginners. As an independent buyer’s agency, Bold Property Group acts only for the buyer, which means the GST election is examined for the buyer’s benefit, not the vendor’s convenience — though the final determination always rests with a qualified tax adviser engaged on the specific deal.
Frequently Asked Questions
Does the margin scheme reduce the total GST on a property?
It reduces the GST the seller remits, because tax is calculated on the margin rather than the full price. It does not necessarily reduce the overall tax cost across the chain, because the buyer cannot claim an input tax credit on a margin-scheme purchase. The net benefit depends on who the buyer is and whether they could have claimed a credit otherwise.
Can the margin scheme be applied after settlement if we forgot to elect it?
No. The buyer and seller must agree in writing to use the margin scheme on or before the day the sale settles. This is a strict statutory requirement with no retrospective remedy, which is why the election must be settled at the contract stage rather than left to settlement day.
Why would a buyer ever object to the margin scheme?
Because a margin-scheme purchase carries no input tax credit. A GST-registered buyer acquiring the property for a business or development purpose may be better off under a standard taxable sale where they can recover the GST. For an owner-occupier or input-taxed investor who could not claim a credit anyway, the margin scheme is usually neutral or favourable.
Can a developer always use the margin scheme on new lots or units?
Not always. If the developer acquired the underlying land as a fully taxable supply and claimed an input tax credit, the margin scheme is generally unavailable on the on-sale. Eligibility turns on how the land was originally acquired, so a developer should confirm the GST history before assuming the scheme applies to a project's feasibility.