What Needs to Be on an Invoice?

Every professional invoice needs enough detail for the client to understand the charge, pay it, and for both parties to keep accurate records. Missing information delays payment and can cause tax issues — particularly if you're GST registered.

A complete invoice must include:

The word "Invoice" (or "Tax Invoice" if you're GST registered)
Your business name, ABN, address, and contact details
A unique invoice number and the date of issue
The client's name and billing address
A description of each item or service with quantity, unit price, and line total
Subtotal, any GST or tax, and the total amount due
Payment due date and payment methods (bank details, BPAY, PayID)
Optional: purchase order number, notes, or a thank-you message

For Australian tax invoices over $1,000, you must also include the buyer's identity or ABN. Always send invoices as PDFs to prevent edits and preserve formatting. InvoiceSonic's templates include every required field automatically — just fill in the blanks.

What Needs to Be on an Invoice?

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