What Must an Invoice Include?

At minimum, an invoice must let the client identify who is billing them, what they are paying for, and how much is due. Tax invoices for GST-registered businesses have additional ATO requirements.

Every invoice should include:

  • The word "Invoice" or "Tax Invoice"
  • Your identity (business name and ABN)
  • Date of issue and unique invoice number
  • Description of goods or services supplied
  • Quantity and price, or a clear fixed amount
  • Total amount payable and payment due date

Tax invoices over $1,000 must also show the buyer's identity or ABN. GST-registered suppliers must show GST payable or state that total price includes GST. InvoiceSonic includes all required fields by default.

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