Free Invoice Template for Australian Businesses (ATO-Compliant)

Every Australian business that is registered for GST must issue a tax invoice for sales over $82.50. Even if you're not registered for GST, issuing professional invoices builds trust with clients and improves your chances of getting paid on time.

This guide explains exactly what must appear on an ATO-compliant Australian tax invoice, common mistakes to avoid, and how to create professional invoices quickly.

ATO Tax Invoice Requirements

For sales between $82.50 and $1,000 (GST-inclusive), a tax invoice must show:

For sales over $1,000, you must also include the buyer's identity (their name or ABN) on the tax invoice.

Recommended Fields for Professional Invoices

While the above are ATO minimums, a professional invoice should also include:

• Invoice number: A unique sequential number for your records
• Your contact details: Business address, phone, and email
• Client's contact details: Their name, company, and address
• Payment terms: Due date (e.g., "Payment due by 1 March 2026")
• Payment methods: BSB/account number, PayID, or payment link
• Line items: Itemised list of services/goods with quantity and unit price
• Subtotal, GST, and total: Clearly broken out
• Purchase order number: If the client requires it for processing
• Late payment terms: Any interest or fees for overdue payments

Invoice Template Structure

Here's the structure of an ATO-compliant Australian tax invoice:

Common Invoice Mistakes to Avoid

• Missing ABN: Your ABN must appear on every tax invoice
• Not labelling it "Tax Invoice": This exact phrase is required by the ATO
• Incorrect GST calculation: GST = price ÷ 11 (for GST-inclusive amounts) or price × 0.1 (for adding GST to ex-GST amounts)
• No payment details: Always include your BSB and account number or PayID
• Vague descriptions: Be specific about what was delivered to avoid disputes
• No invoice number: Sequential numbering helps with record-keeping and audits

Invoice Templates vs. Invoicing Software

You can create invoices using Word, Excel, or Google Docs templates — but these are time-consuming and error-prone. For most Australian small businesses, dedicated invoicing software is a better choice:

• Automatically calculates GST correctly every time
• Assigns sequential invoice numbers automatically
• Sends automatic payment reminders to clients
• Tracks which invoices are paid, overdue, or pending
• Generates BAS-ready GST reports with one click
• Looks professional on any device