How to Invoice With an ABN

Invoicing with an ABN means including your 11-digit Australian Business Number on every invoice you issue. If you're carrying on an enterprise in Australia, an ABN is required for any invoice over $75 — without it, your client must withhold 47% of the payment under the No-ABN Withholding rule.

To invoice correctly with your ABN:

Display your ABN clearly at the top of every invoice, near your business name
Use the format "ABN: XX XXX XXX XXX" with spaces between groups
If you're GST registered, label the document "Tax Invoice"
Add a unique sequential invoice number and the issue date
Include the client's name and address — plus their ABN if the sale is $1,000+
Itemise each line with description, quantity, rate, and line total
Show subtotal, GST (if registered), and total
Add payment terms and bank details

You can verify your ABN status on ABN Lookup before issuing — clients may check that yours is active. If you don't have an ABN yet, apply for one free through ABR. InvoiceSonic stores your ABN once and adds it to every invoice automatically.

How to Invoice With an ABN

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