What to Put on an Invoice

What you put on an invoice determines how quickly you get paid. A clear, complete invoice gives the client everything they need to approve and process payment without coming back with questions.

Put these fields on every invoice you issue:

The word "Invoice" or "Tax Invoice" (if you're GST registered)
Your business name, ABN, and contact details
A unique sequential invoice number
The issue date
The client's name and billing address
A line-by-line breakdown of the work with description, quantity, and rate
Subtotal, GST (if applicable), and total
Payment due date and methods (bank, BPAY, PayID)
A purchase order or project reference, if your client uses one
A short thank-you note or polite payment terms

For Australian tax invoices of $1,000 or more, also include the buyer's identity or ABN. Save the invoice as a PDF before sending — PDFs lock in formatting and look professional on any device. InvoiceSonic's templates pre-fill every required field so you only enter what changes.

What to Put on an Invoice

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