What Should an Invoice Include?

An invoice should include every piece of information the client needs to identify, approve, and pay the charge — plus the details you need for your own records and tax reporting. Missing fields cause delays and can create issues at BAS time.

A complete invoice includes:

The word "Invoice" (or "Tax Invoice" if you're GST registered)
Your business name, ABN, and contact details
Your business logo (optional but professional)
A unique sequential invoice number
The date of issue
The client's name and billing address
Description of each item or service, with quantity, unit price, and line total
Subtotal, any GST or other tax, and the total amount payable
Payment due date — typically 7, 14, or 30 days
Payment methods — bank, BPAY, PayID, credit card link
A purchase order or project reference, if applicable
A short thank-you note or terms in the footer

For Australian tax invoices of $1,000 or more, also include the buyer's identity or ABN. Always send invoices as PDFs to preserve formatting. InvoiceSonic's templates pre-fill every recommended field.

What Should an Invoice Include?

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