GST Margin Scheme Calculator

Enter the Property Sale and Acquisition Basis

The GST margin scheme calculates tax on an eligible property-sale margin. Enter the sale consideration and the supported acquisition basis separately.

The consideration basis uses the amount paid to acquire the property. Development expenditure, stamp duty and selling fees do not increase that basis. Relevant settlement adjustments can affect the consideration.

The valuation branch supports an approved value at 1 July 2000 for an eligible pre-GST holding, with registration by that date. Later registration dates need a separate calculation. An acquisition contract entered before that boundary can establish the necessary holding even if settlement follows it.

The calculator supports sale contracts from 1 December 2005 onwards. Keep the acquisition and sale contracts with the settlement statement. Their dates do not establish eligibility by themselves.

Confirm that the property sale is eligible and that the parties have the required written agreement. For these transactions, agreement is required by the supply, generally settlement, unless the Commissioner allows more time.

The ATO’s margin-scheme guidance explains the eligibility and agreement checks. Special acquisition histories require separate treatment before using an estimate.

Calculate GST on the Eligible Margin

$1,440,000.00 − $1,000,000.00 = $440,000.00. Positive margin $440,000.00 ÷ 11 = $40,000.00 GST.

Sale 100%. Basis 100%. Signed difference $440,000.00.

GST equals one-eleventh of the positive margin. The calculator allocates the sale and acquisition amounts separately, subtracts the allocated basis and divides the positive difference by 11.

In this fictional insolvency disposal, the eligible sale consideration is $1,440,000 and the acquisition consideration is $1,000,000. Both allocations are 100%.

The $440,000 margin gives $40,000 GST. The entered sale less GST is $1,400,000. Other deductions of $850,000 leave $550,000.

Those deductions can include agent fees and secured debt. They affect the cash reconciliation, while the acquisition basis remains separate. Applying ordinary GST to the full sale price would answer a different question.

Use the GST calculator for ordinary taxable fees and expenses. This tool rounds allocated amounts and the tax component to cents before calculating proceeds. Estimated totals display whole dollars, while the recorded-tax difference retains cents.

Check Valuations and Apportionments

Each allocation must identify the same taxable interest sold. The sale percentage applies to entered sale consideration. The basis percentage applies to the original acquired property, so those percentages can differ.

For a lot sold out of a larger parcel, retain the acquisition documents and a fair and reasonable allocation schedule. Area alone can be inappropriate where lots differ in value.

For example, a uniform-value parcel costs $240,000. A sold lot covering 40% of that parcel has a $96,000 basis. A $140,000 sale produces a $44,000 margin and $4,000 GST.

For mixed taxable and non-taxable property, allocate both amounts to the taxable component. An ownership share must also describe the actual interest supplied. Enter amounts already allocated to an interest at 100% to avoid applying its share twice.

The ATO’s consideration and apportionment ruling explains allocating acquisition consideration. Its valuation ruling covers pre-GST holdings and mixed supplies.

Keep the valuation report and allocation evidence with the property schedule. This calculator excludes special acquisitions, including inherited interests, associate transfers and acquisitions requiring earlier-owner figures or increasing adjustments.

A negative difference produces a zero margin component, with the signed difference still shown. It does not establish that the transaction has no other GST liability. A missing basis is invalid, rather than a zero value.

Reconcile the Result With Sale Proceeds

Compare the calculated tax with the GST component recorded for the disposal. The difference equals recorded GST less calculated GST. Keep a non-zero difference as an item to investigate.

The proceeds figures start with the full entered sale consideration, even when only part of that sale is taxable. Other deductions must use that same receipt scope. For an entity-only reconciliation, enter that entity’s sale consideration and the corresponding basis.

Purchaser withholding is a settlement payment mechanism and can differ from the final margin-scheme liability. Keep withholding credits and payment timing separate. Do not deduct both the estimated liability and the same tax withheld as another expense.

Match deposits and the settlement balance to the administration cashbook. Trace fees and secured-debt payments to their supporting statements. The liquidation guide explains the administration records surrounding an asset realisation.

The result is an arithmetic estimate. It does not decide taxability, registration or disputed eligibility. Business activity statements fall outside this calculator. Inputs remain in this tab and clear on reload.