Naylor v Simpson

In the matter of Naylor v Simpson, the dispute arose out of a domestic building contract, where the primary issue was the inclusion of Goods and Services Tax (GST) in the "Actual Cost of the Works" and whether such inclusion was contingent upon the builder’s compliance with GST laws. The case was heard and determined in the Supreme Court of Queensland.

The central legal issues before the court were whether the builder, Simpson, complied with the conditions of the contract to claim GST and whether the contract required Simpson to adhere to GST laws for the GST to be payable. Additionally, the court had to determine if the builder’s use of a family trust ABN instead of his personal ABN in the invoices affected the GST claim. The contract stipulated that the "Actual Cost of the Works" included GST, but this inclusion was not explicitly made contingent on compliance with other clauses or GST law. The court had to interpret whether the inclusion of GST in the "Actual Cost of the Works" was dependent on Simpson's compliance with other clauses or GST law.

The court held that the inclusion of GST in the "Actual Cost of the Works" was not expressed as dependent upon compliance with other clauses or GST law. The contract did not require Simpson to include an ABN for GST purposes, and the ABN field in the contract was left blank. Consequently, the question for the Tribunal was not whether a GST liability arose between Simpson and the Commissioner of Taxation, or whether Simpson had paid GST to the Commissioner of Taxation, but whether, as a matter of law, GST was included as part of the invoices under the contract. The court concluded that the inclusion of GST in the invoices did not depend upon compliance with other clauses or GST law. Therefore, the appeal was dismissed, upholding the decision that Simpson was entitled to the GST included in the "Actual Cost of the Works" as per the contract.