# Australian invoicing glossary

Australian English glossary: ABN, GST, and invoicing terms for small businesses, with clear definitions, comparisons, and ATO-oriented tips.

Canonical page: https://invoicemama.com/glossary/au

## Australian terms

- [What is a BAS?](https://invoicemama.com/glossary/au/what-is-a-bas): What is a BAS? Report GST, PAYG withholding, and instalments to the ATO. Due dates, cycles, labels, and how tax invoices support each period.
- [What is a tax invoice in Australia?](https://invoicemama.com/glossary/au/what-is-a-tax-invoice-australia): What is a tax invoice in Australia? A GST document for taxable sales with ABN, GST lines, ATO thresholds, purchaser rules, BAS prep, and net 30 timing.
- [What is an ABN?](https://invoicemama.com/glossary/au/what-is-an-abn): Australian Business Number (ABN): 11-digit identifier, ABR registration, GST tax invoices, PAYG withholding when no ABN is quoted, and ABN vs ACN vs TFN.

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