ATO Tax Invoice Requirements (Australia)

Quick answer

In Australia, a GST-registered business must issue a tax invoice that clearly shows the words “Tax Invoice”, your business name, your ABN, the date of issue, a description of what you supplied, the GST amount (or a statement that the total includes GST), and the total payable. For invoices of $1,000 or more you must also show the buyer’s identity or ABN. If you’re not registered for GST, you issue a regular invoice instead - no GST, and you must not label it “Tax Invoice”.

Note: this is general information, not tax advice. Always cross-check with the ATO (ato.gov.au) for your specific situation.

The ATO tax invoice checklist

Here is everything that should appear on an Australian tax invoice. The first seven are the fields the ATO requires; the rest are strongly recommended and help you get paid faster.

• The words “Tax Invoice” - clearly displayed, usually at the top (only if you’re GST-registered).
• Your business or trading name - the name your client knows you by.
• Your ABN - the 11-digit Australian Business Number, on every invoice.
• The date of issue - the date you raised the invoice.
• A description of what you supplied - labour, materials, services, with quantities where relevant.
• The GST amount - shown as a line, or a clear “Total includes GST” statement.
• The total amount payable - the final figure your client owes.
• The buyer’s identity - name, address, or ABN, required once the invoice total is $1,000 or more.
• An invoice number - not strictly mandatory, but standard practice (see below).
• How to pay - your BSB and account number, or a pay-by-card link, plus payment terms.

When is a tax invoice actually required?

If you’re registered for GST and you make a taxable sale, you must give the customer a tax invoice within 28 days of them asking for one. Two thresholds change what you need to provide:

• Sales of $82.50 or less (including GST): your customer doesn’t strictly need a full tax invoice to claim a GST credit - a receipt is enough.
• Sales over $82.50: a full tax invoice with all the fields above is required.
• Sales of $1,000 or more: the invoice must also show the buyer’s identity or ABN. We cover this in detail in our guide on tax invoices over $1,000.

Tax invoice vs regular invoice (GST registration)

The single biggest mistake sole traders make is labelling a document a “Tax Invoice” when they’re not registered for GST. The rule is simple:

• Registered for GST (turnover $75,000+, or you chose to register): you charge 10% GST, show it on the invoice, and call it a Tax Invoice.
• Not registered for GST (turnover under $75,000): you do not charge GST, do not show a GST amount, and call it a plain Invoice.

If you’re under the threshold, our guide on invoicing when you’re not registered for GST has the exact wording to use. If you are registered, see how to add GST to an invoice for worked examples of GST-inclusive and GST-exclusive pricing.

Is an invoice number mandatory?

This trips a lot of people up. A sequential invoice number is not one of the ATO’s strictly mandatory tax-invoice fields - but it is standard practice and effectively expected. A unique number gives each invoice an identifier you can both refer to, makes reconciliation and BAS far easier, and is exactly what an auditor looks for. Use a simple consistent format like INV-0001, INV-0002. Our guide on how to number invoices in Australia covers the formats that hold up best.

What tradies need on a tax invoice

Tradies, plumbers, and electricians have the same core ATO requirements as everyone else, plus a few practical extras that prevent disputes:

• Separate labour and materials as line items so the client can see what they’re paying for.
• The job or site address, especially on construction and repair work.
• Licence numbers where your trade requires them (e.g. electrical or gas work).
• Progress claims vs final invoice for larger jobs, each numbered and dated.

We’ve written a dedicated guide to the ATO tax invoice requirements for tradies covering licence numbers, site addresses, and progress claims in detail. For a full walkthrough, see how to invoice as a tradie, or grab a ready-made electrician or plumber template.

What happens if you leave a field out?

• Missing ABN: your client must withhold 47% of the payment under the no-ABN withholding rule.
• Missing GST amount: your client can’t claim a GST credit and may ask you to reissue.
• Not labelled “Tax Invoice”: the ATO can refuse to treat it as a valid tax invoice for GST-credit purposes.
• No buyer ID on a $1,000+ invoice: same problem - the document isn’t a valid tax invoice.

The fix is always the same: reissue with the missing field. It delays payment and it’s entirely avoidable with a template that locks in every field by default.

How Free Invoice App keeps you compliant

Every invoice you create in Free Invoice App is pre-populated with the ATO-required fields. Your ABN, business name, and GST treatment are saved once and applied to every invoice. Invoices are numbered automatically, the buyer-identity field appears when a total crosses $1,000, and you can email a compliant PDF straight from your phone. You don’t have to remember the rules - the template does.

The Starter plan is free with 7 sends per month and no credit card. Create your first invoice in under 60 seconds, or see plans (Pro is A$5/month).

Frequently asked questions

What must be included on an ATO tax invoice?

A GST-registered business must show the words “Tax Invoice”, your business name, your ABN, the date of issue, a description of what you supplied, the GST amount (or a statement that the total includes GST), and the total payable. Invoices of $1,000 or more must also show the buyer’s identity or ABN.

Is an invoice number mandatory on an Australian tax invoice?

It isn’t one of the ATO’s strictly mandatory fields, but it’s standard practice and effectively expected. Number every invoice with a unique, sequential identifier such as INV-0001.

Do I need to include GST on my invoice?

Only if you’re registered for GST. If you are, you charge 10% and show it on a tax invoice. If you’re not registered (turnover under $75,000), you must not charge GST or call it a “Tax Invoice”.

When is a tax invoice required in Australia?

A GST-registered seller must provide one within 28 days of a customer asking, for any taxable sale over $82.50 (including GST). Below $82.50, a receipt is enough.

Do tradies need to charge GST?

Only once turnover reaches $75,000 in a 12-month period, when GST registration becomes compulsory. Below that it’s optional, though many tradies register early to claim GST credits on tools and materials.

Can I email a tax invoice as a PDF?

Yes. The ATO accepts electronic tax invoices. A PDF with all the required fields is valid. See how to send an invoice by email for the subject line and wording that get invoices paid.