How to Write an Invoice

Writing an invoice is straightforward once you know what information to include. Start with a clean template, fill in your business and client details, list the work performed with prices, calculate any tax, and clearly state how and when payment is due.

Follow these steps to write a professional invoice: 1. Add your business name, ABN (if applicable), address, phone, and email at the top 2. Insert a unique invoice number and the date of issue 3. Enter the client's full name or business name and billing address 4. List each product or service on its own line with quantity, unit price, and line total 5. Show the subtotal, any GST or tax, and the final total due 6. State payment terms (e.g. "Payment due within 14 days") and payment methods 7. Add any notes — bank details, reference number, or a thank-you message

Save a copy for your records and send the PDF to your client by email. InvoiceSonic handles formatting, numbering, and tax calculations automatically so you can focus on the work, not the paperwork.