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Property tax

Selling new homes or subdivided land? Two things decide how much GST you pay

GST on a new home or a residential lot is one eleventh of the whole price, unless the margin scheme applies. Whether it applies turns on how you came to own the property and on one clause in the contract, and on a development the difference usually runs to six figures.

Free to run, no sign up Full report from $19 25 free guides 1 July 2026 GST law

Most developers think the margin scheme is a box on the contract. It is a test you can fail before you ever sign.

When a registered developer sells a new home, a townhouse or a subdivided residential lot, the GST is one eleventh of the whole price. Under the margin scheme it is one eleventh of the margin instead: the sale price less what you paid for the property. On a sale at the Australian mean dwelling price of $1,111,100, GST on the whole price is $101,009. The margin scheme takes one eleventh of what you paid for the property off that figure.

Two things decide whether you get it. The first is how the property came to you. If you bought it as a fully taxable sale, with GST worked out on the whole price, the scheme is closed to you. Since 9 December 2008, buying it as a GST-free going concern, as GST-free farm land, or from an associate for nothing also closes it if the seller could not have used the scheme. The second is a written agreement with the buyer, made on or before settlement. A calculator that only divides by eleven checks neither.

And the build cost does not come off the margin. Construction, stamp duty, legal fees, council contributions and interest are all left out of it by law. The build gives you GST credits instead, which is the same money by a different route, so the law does not let you have both.

If the margin scheme is not agreed in writing by the day a lot settles, that lot is taxed on the whole price. On most developments the difference is one eleventh of everything paid for the land.

What the calculator works out for you

  • Whether you can use the margin scheme at all. It checks how you acquired the property, across all nine ways the calculator asks about, and when, against the 9 December 2008 and 17 March 2005 dates the rules turn on.
  • GST both ways, on your own figures. On the whole price, and on the margin. If you have held the land since before 1 July 2000, the margin can be measured from an approved valuation at that date instead of what you paid, which is usually far higher.
  • Whether the contract can still be fixed. Not signed yet, signed without the clause, or already settled: each one leaves a different set of choices open.
  • How many lawful ways there are to tax this sale. The margin scheme, the whole price, a GST-free sale as a going concern (where the buyer is registered for GST and the property is let or is land being developed), and the others your answers allow.
  • How far apart they are. The gap in dollars between the treatment that leaves you the most and the one that leaves you the least, on the same sale on the same day.
GST on the whole price at the mean dwelling price $101,009
held back by the buyer at settlement under the margin scheme 7%
penalty for not giving the buyer the written notice $36,400
the date that tightened who can use the scheme 9 December 2008

What the full report adds

  1. Every lawful treatment, priced to the dollar and ranked on what is left of the sale price after GST, with what each one involves and what has to be signed for it.
  2. Settlement day, worked out. The buyer holds back 7% of the price under the margin scheme, or one eleventh of it on the whole price, and pays it to the ATO. That is not the GST. The 7% only matches the real GST when the margin is measured from 23% of the price, so the report shows the refund or the shortfall your lender needs to know about.
  3. What renting unsold stock costs. Rent on a home carries no GST, so letting part of a development means paying back part of the GST credits on the build, checked every 30 June for up to 10 years. The report prices it with the property kept on the market and taken off it, and shows what five years of renting would do to the whole sale.
  4. Lot by lot, with a dated checklist. The same figures for every contract, and every date that has to be met in writing. One payment of $19, no expiry, for every stage and every new set of figures, with a PDF for your accountant or conveyancer.

What it will not do

It does not give tax advice and it does not recommend a treatment. It cannot read your contracts or your title, and whether the margin scheme is open to you depends on how every earlier owner acquired the property, which only those documents can prove. That is a judgement for a registered tax agent, or for the ATO through a private ruling, which is free and binds the Commissioner. GST advice and compliance from a tax agent or GST adviser is billed at $100 an hour to $500 an hour, and written advice on a development takes many hours; this report costs $19, once, so you can go into that meeting with the numbers already done. Income tax, capital gains tax, stamp duty and land tax are not in these figures. GST is self-assessed on your own activity statement and can be reviewed by the ATO. Everything here runs on the 1 July 2026 GST law.

What people ask before they run it

How much GST do I pay when I sell a new home or apartment?

If the sale is taxable, GST is one eleventh of the price. That is $101,009 on a sale at the Australian mean dwelling price of $1,111,100. If you are eligible for the margin scheme and the contract says so in writing, GST is one eleventh of the margin instead. The margin is the price less what you paid for the property. Development costs, stamp duty and legal fees do not come off it.

What is the GST margin scheme?

The GST margin scheme is a way to work out GST on a property sale using the margin instead of the whole price. The margin is the sale price less what you paid for the property, and GST is one eleventh of that margin. It is not automatic. You must be eligible, and you and the buyer must agree to it in writing on or before settlement.

How do you calculate GST under the margin scheme?

Take the sale price, subtract what you paid for the property, and divide the result by eleven. On a $900,000 sale of land bought for $500,000, the margin is $400,000 and the GST is $36,364. Without the margin scheme, GST on the whole price would be $81,818. The build cost does not come off the margin. It gives you GST credits instead.

Who can use the GST margin scheme?

You can use it if you are registered for GST, the sale is taxable, you and the buyer agree in writing on or before settlement, and you did not buy the whole property through a sale that was ineligible for the margin scheme. The most common reason people miss out is buying the property as a fully taxable sale, with GST worked out the ordinary way. Since 9 December 2008, buying as a GST-free going concern, as GST-free farmland, or from an associate for nothing also rules you out if that seller was ineligible.

Can I add the margin scheme after the contract is signed?

Yes, as long as the sale has not settled. For GST, a sale of land happens at settlement, not when contracts are exchanged. So a contract already signed without the margin scheme clause can still be fixed by a variation that you and the buyer both sign before settlement. Once it settles, the chance is gone on that lot, and each lot closes separately.

What happens if the margin scheme clause is left out of the contract?

The sale is taxed on the whole price instead of the margin. The agreement has to be made in writing on or before the day of the supply, which is settlement. The Commissioner can extend the time to put an agreement in writing, but has no power to apply the margin scheme where the two sides never agreed that it applied. On a development, the difference is usually everything you paid for the land, divided by eleven.

How much does the buyer withhold at settlement?

The buyer holds back one eleventh of the contract price, or 7% if the margin scheme applies, and pays it straight to the ATO. This applies to a taxable sale of new residential premises or potential residential land. You must tell the buyer in writing before settlement. Failing to do so carries a penalty of 100 penalty units, which is $36,400. You get the withheld amount back as a credit when you lodge the activity statement for that period.

Does the buyer get a GST credit under the margin scheme?

No. When a property is sold under the margin scheme, the buyer cannot claim a GST credit on the price. For a home buyer that makes no difference. For a buyer registered for GST and buying for a business, it does, which gives them a reason to say nothing and let the margin scheme clause stay blank. That is why checking the contract yourself matters.

Is there GST on subdivided land?

Yes, when a registered developer sells it. Subdivided lots are potential residential land, which means land you may build a home on with nothing on it used for a commercial purpose. The sale is taxable, the margin scheme applies on the same terms as a finished home, and the buyer withholds at settlement. The one exception is a registered business buying the land for a creditable purpose.

Does the build cost come off the margin?

No, and this is the most expensive misunderstanding in the subject. Section 75-14 keeps development costs, construction, stamp duty, legal fees, options, council contributions and interest out of the purchase figure entirely. The margin is the sale price less what you paid for the property. What the build does instead is give you GST credits at one eleventh of what you spent. That is worth the same money by a different route, which is why the law will not let you have both.

What happens if I rent out a new property before I sell it?

You pay back part of the GST credits you claimed on the build. Rent on a home is input taxed, so renting is not a creditable purpose. Under Division 129 you have an increasing adjustment at the next adjustment period ending 30 June. Keeping the property genuinely on the market while it is tenanted reduces the adjustment, and taking it off the market increases it. Rent it for five years straight with no marketing at all and the sale stops being taxable, and every credit is repaid.

How is the margin worked out if I bought the land before 1 July 2000?

You can use either what you paid, or an approved valuation of the property as at 1 July 2000 (or the day you registered for GST, if that was later). On land held since the 1990s the valuation is usually far higher than the price paid, so the margin, and the GST on it, is far smaller. A real estate agent's appraisal does not count as an approved valuation.

Why does the report cost this when an accountant charges hundreds an hour?

Because the maths is the part most developers are missing, and maths scales. GST advice and compliance is billed at $100 an hour to $500 an hour in Australia, and a written GST opinion on a development is not a one hour job. This service is not licensed to give you a recommendation and does not attempt one.

Everything on GST Margin Scheme

Your estimate is free, and it is a real answer.

Prices the GST on an Australian new residential property sale every lawful way on your own figures - the full one eleventh of the price, the margin scheme on the consideration you paid, the margin scheme on an approved valuation, a GST-free going concern - checks whether the chain of title lets you use the margin scheme at all, works out the amount the purchaser withholds at settlement, and prices the increasing adjustment where the property is rented before it sells.

Start the Margin Scheme calculator