How to Write an Invoice in Australia

Writing an invoice in Australia means following ATO record-keeping rules and, if you're GST registered, the additional requirements for tax invoices. You can write one in Word, Excel, or — much faster — with a free Australian invoice generator.

Step by step: 1. Open a template and add your business name, ABN, and contact details 2. Insert a unique sequential invoice number (e.g. INV-0001) 3. Add today's date as the issue date 4. Enter the client's name and billing address 5. List each item or service with description, quantity, unit price, and line total in AUD 6. Calculate the subtotal 7. If you're GST registered, label the document "Tax Invoice" and add 10% GST 8. Show subtotal, GST, and total amount payable 9. Set payment terms — Net 14 is most common — and add a due date 10. Include bank details, BPAY, or PayID 11. Save as PDF and email to the client

Keep every invoice for at least five years for ATO records. InvoiceSonic is built for Australian sole traders, contractors, and small businesses and handles ABN, GST, and tax invoice formatting automatically.