Applying the GST margin scheme can significantly reduce the tax payable on a property sale. For developers selling new residential premises or subdivided lots, it is an invaluable tool, but not one that can be left until settlement. 

Eligibility hinges entirely on how the property was originally acquired, and from there, every element must align: from the contract terms and calculation method to GST withholding and BAS reporting. 

What Is the GST Margin Scheme?

The margin scheme is an alternative way of calculating goods and services tax (GST) on an eligible taxable sale of real property. Division 75 of the GST Act contains the rules. Under the ordinary GST rules, the amount payable is generally one-eleventh of the GST-inclusive sale price. Under the margin scheme, it is one-eleventh of the margin.

The margin is not the same as your development profit. It is generally the difference between the sale price and either the amount paid to acquire the property or an approved value, depending on the applicable method.

That distinction matters. Construction costs, interest, stamp duty, and selling expenses affect a project’s commercial result, but you don’t simply deduct them when calculating the margin.

The scheme can apply to new residential premises, vacant land, and commercial property. The sale must still be taxable, and the seller must satisfy the eligibility rules.

When Can You Use the Margin Scheme?

If you sell property as part of your business and you are registered or required to be registered for GST, the margin scheme may be available. The next question is how you acquired the property.

The acquisition history matters because an ineligible transaction can prevent a later seller from using the scheme. These are the general positions for common situations:

These positions are not interchangeable. Buying a property as part of a GST-free going concern does not automatically preserve access to the scheme. If the previous owner acquired the entire property through a fully taxable sale without it, the later sale may be ineligible. Similar tracing rules affect GST-free farmland and certain associate transactions.

When Can’t the Margin Scheme Be Used?

The margin scheme generally cannot be used if you acquired the property through a fully taxable sale and GST was calculated without the scheme. This remains the case even if using the scheme would produce a lower GST amount on your sale.

It also cannot apply when the property sale is not taxable. For example, an ordinary sale of existing residential premises is generally input taxed, so the margin scheme does not apply.

Other restrictions can affect property obtained through an inheritance, GST group, joint venture, or associate transaction. These rules often depend on the previous owner’s position, not the current contract alone.

A contract cannot create eligibility where the acquisition history prevents it. Review the GST treatment before buying a development site, not only when preparing to sell it.

The Agreement Must Be in Writing by the Supply Date

Using the margin scheme requires a written agreement between the seller and buyer on or before supply. For an ordinary sale of real property, the supply will generally be made at settlement. Most property contracts address this requirement through a specific clause or selection in the GST section, which helps avoid later uncertainty.

Before signing, the seller should confirm:

• Eligibility: The acquisition documents and prior GST treatment support use of the scheme.

• Contract wording: The agreement clearly records that the parties will apply the margin scheme.

• Project modelling: The sale price, expected GST, withholding, and settlement cash flow reflect the intended treatment.

The Commissioner of Taxation may allow additional time in limited circumstances. Relying on that discretion creates uncertainty when the contract could have addressed the position from the outset.

How Is GST Calculated Under the Margin Scheme?

The correct calculation depends on whether the consideration method or valuation method applies.

The ATO provides separate rules for calculating GST payable on property, including subdivided land and mixed supplies.

The Consideration Method

Under the consideration method, the margin is generally the sale price less the amount paid to acquire the property. GST is one-eleventh of the resulting margin.

For example:

The $400,000 margin is not the developer’s profit. Construction costs, finance, professional fees, stamp duty, and selling expenses are not deducted.

Eligible GST credits on development costs depend on the property’s intended and actual use, not on the decision to apply the margin scheme. Credits may be available where costs relate to a taxable sale of new residential premises. If the property is instead used for input-taxed residential leasing, or has both taxable and input-taxed uses, you may need to apportion or adjust credits.

The Valuation Method

The valuation method uses an approved property value instead of the acquisition amount. It may apply to property held before 1 July 2000 and certain other transactions. The relevant date depends on the acquisition and GST registration history, so it is not always 1 July 2000.

An informal estimate is not enough. The valuation must meet an approved method and be supported by appropriate records. Depending on the approved method and circumstances, you may need a valuation from a suitably qualified professional valuer.

How Does the Margin Scheme Work for Subdivided Land?

When land is subdivided or developed into strata units, you must allocate part of the original acquisition amount to each lot or unit sold. The margin for an individual sale is then generally its selling price less the allocated acquisition amount.

The allocation must use a reasonable method. An area-based calculation may work for comparable lots, but it may be unsuitable where frontage, views, access, zoning, or development potential differ. Choose a consistent method and document it before sales begin.

Amalgamated land creates another layer. If a development combines parcels acquired under different GST treatments, the margin scheme may apply to only part of the property, and you may need to make an adjustment.

How Does GST Withholding Work at Settlement?

Most purchasers of taxable new residential premises or potential residential land must withhold part of the purchase price and pay it directly to the Australian Taxation Office (ATO).

The withholding amount depends on the transaction:

• Margin scheme sale: The purchaser generally withholds 7% of the contract price for a standard arm’s-length transaction.

• Fully taxable sale without the margin scheme: The purchaser generally withholds one-eleventh of the contract price.

• Certain associate transactions: If no consideration is provided, or the consideration is below the GST-inclusive market value, withholding is generally 10% of the GST-exclusive market value.

The ATO’s GST at settlement requirements explain the purchaser and supplier reporting process.

The amount withheld is not necessarily the seller’s final GST liability. The seller still calculates GST as one-eleventh of the margin and reports the transaction in their BAS. Under the ATO’s margin scheme instructions, the margin is reported at G1 and the GST payable on that margin is reported at 1A.

The settlement amount paid to the ATO is credited to the seller’s GST property credits account. Once the BAS is processed, that credit is transferred to the seller’s activity statement account and applied against the GST liability. It is not reported as a GST purchase credit at 1B.

The seller must give the purchaser written notification stating whether withholding is required and, if so, the relevant amount and payment details. The purchaser or their representative then completes the required ATO settlement forms.

Accurate BAS preparation and GST reporting help ensure the sale, available GST credits, and settlement withholding credit are recorded in the same reporting process.

Can the Buyer Claim a GST Credit?

A buyer cannot claim a GST credit for the property purchase when the margin scheme was used. The seller is also not required to provide a tax invoice for that sale.

This restriction applies to the property acquisition. A GST-registered developer may still be entitled to credits for construction, consulting, and professional expenses to the extent those costs relate to a creditable purpose. Residential leasing is generally input-taxed, so credits may need to be denied, apportioned, or adjusted where the property’s intended or actual use includes residential rent. The buyer should consider the effect on project feasibility and future sale options before agreeing.

What Records Should You Keep?

The calculation needs a clear evidence trail. Relevant records may include:

• Purchase and sale documents: Retain contracts, settlement statements, written agreements, supplier notifications, and evidence of the acquisition’s GST treatment.

• Valuation material: Preserve the approved valuation, instructions, supporting information, and applicable valuation date.

• Apportionment calculations: Record how the acquisition amount was allocated across subdivided lots, strata units, or mixed-use areas.

• GST reporting records: Keep project tax invoices, withholding forms, payment references, activity statements, and reconciliation workpapers.

GST records generally need to be kept for at least five years. Longer retention may be appropriate where documents remain relevant to later property sales, income tax treatment, or other record-keeping obligations.

What Should You Check Before Signing the Contract?

Consider the margin scheme during acquisition and project planning. By settlement, you may have already made some of the most important choices.

Before committing to the transaction:

• Trace the ownership history: Confirm how you and any relevant previous owner acquired the property.

• Confirm the entity’s GST status: Establish whether the seller is registered or required to be registered and model both calculation methods where available.

• Review the contract: Make sure the GST clauses record the intended treatment on or before the supply is made, preferably when the contract is signed.

• Confirm valuation and withholding: Obtain an approved valuation where required and include purchaser withholding in cash-flow forecasts.

• Prepare the reporting trail: Align the contract, accounting entries, GST credits, withholding credit, and BAS.

The order matters. A lower GST estimate is of little use if the acquisition history or contract prevents the scheme from applying.

Review the GST Position Before the Property Is Sold

The GST margin scheme can improve the tax and cash-flow outcome of an eligible sale, but the acquisition history, calculation, and contract must support it. It belongs in the project’s feasibility work, not in a last-minute settlement review.

Coleman Financial Group provides property development accounting support across project structuring, feasibility, GST planning, reporting, and cash flow. We can review the available records, model the expected GST position, and work with your solicitor or conveyancer before the contract is finalised.

Contact Coleman Financial Group to discuss the GST treatment of your property project.

This article provides general information only and does not constitute tax, legal, or financial advice. The GST treatment of a property transaction depends on its specific facts, acquisition history, contract, and the parties involved. Seek advice tailored to your circumstances before acting.

Frequently Asked Questions

Does the margin scheme apply automatically?

No. The property sale must be eligible, and the seller and buyer must generally agree in writing to use the margin scheme on or before the supply is made for an ordinary property sale, which will generally be settlement. Applying the calculation in a BAS does not correct an ineligible acquisition or missing agreement.

Does the margin scheme apply to existing residential property?

An ordinary sale of existing residential premises is generally input-taxed. GST is not charged on that sale, so the margin scheme does not apply.

Different rules can apply when substantial renovations or a replacement building cause the premises to be treated as new residential premises.

Can the margin scheme be added after the contract is signed?

The parties may be able to record their written agreement after signing the contract, provided they do so on or before the supply is made. For an ordinary property sale, this will generally be settlement. If the supply has already been made, the seller would need to seek additional time from the Commissioner of Taxation.

Are construction costs deducted from the margin?

No. Construction costs and other development expenses are not generally deducted when calculating the margin. Any GST credits on those expenses are considered separately and depend on the property’s intended and actual use. Input-taxed residential leasing may require apportioning or adjusting credits.

Is the margin scheme cheaper than standard GST?

It can reduce the GST payable because GST is calculated on the margin rather than the full sale price. However, that does not automatically make it the better commercial option. You also need to consider eligibility, contract pricing, settlement cash flow, available GST credits, and the buyer’s inability to claim a GST credit for the property purchase.

What happens when land is subdivided?

A reasonable portion of the property’s acquisition amount must be allocated to each lot or strata unit. That allocated amount is used to calculate the margin when the individual property is sold.

Can a buyer claim GST credits under the margin scheme?

No. A buyer cannot claim a GST credit for property acquired under the margin scheme. Factor this into the buyer’s project modelling before agreeing to the contract terms.