Tax invoice requirements Australia: How to comply with ATO and GST rules

Key takeaways

• A tax invoice is a GST document issued by a GST-registered business for a taxable sale. If you're not registered for GST, you issue a regular invoice instead.

• Sales under $1,000 need seven specific details. Sales of $1,000 or more need those seven plus the buyer's identity or ABN, and mixed invoices must show which items are taxable.

• Airwallex’s invoicing tool helps you create, send, collect, and reconcile invoice payments, while our financial platform helps your business manage expenses and grow your business globally.

A missing ABN or an unclear GST line can hold up payment for weeks, and it can stop your customer claiming a GST credit until the invoice is corrected. Tax invoice requirements in Australia are set by the Australian Taxation Office (ATO), and they're more specific than most operators expect – what you need to include changes with the value of the sale.

Australian businesses exchange more than 1.2 billion invoices a year, and around 90% of invoice processing is still fully or partly manual, according to 2020 insights from the Australian Treasury¹. That's a lot of room for small, expensive errors.

This guide covers what a tax invoice is, when you have to issue one, what it must contain, how digital invoices and eInvoicing fit in, how to fix a mistake, and how invoicing software removes the manual work.

What is a tax invoice in Australia?

A tax invoice is a document issued by a GST-registered business for a taxable sale. It shows the goods and services tax (GST) charged and gives the buyer the evidence they need to claim a GST credit. 

Not every document showing a payment is a tax invoice. Three terms get used interchangeably, and they aren't the same thing:

• Tax invoice: Issued by a GST-registered business for a taxable sale, including the required GST information.

• Regular invoice: Can be issued by any business. If you're not registered for GST, don't label it "tax invoice" and don't show GST as being charged.

• Receipt: Confirms payment has been made. It only counts as a tax invoice if it happens to contain all the required information.

Everyday language blurs this further. Most operators know what an invoice is, and "bill" usually describes the same document from the other side of the transaction. Neither term tells you anything about GST. The distinction that matters to the ATO is between a tax invoice and a regular invoice.

When do you need to provide a tax invoice?

You need to provide a tax invoice when your customer asks for one, and the taxable sale is more than $82.50 including GST. You don’t need to provide one automatically, and not for every sale.

Here's how the ATO's position breaks down:

• Taxable sale over $82.50 including GST: If you're registered for GST and your customer requests a tax invoice, you must provide it within 28 days of the request.

• Taxable sale of $82.50 or less including GST: Your customer generally doesn't need a full tax invoice to claim a GST credit. Keep an appropriate record of the sale anyway, such as a docket or receipt, and issue a tax invoice if you'd prefer to.

• Not registered for GST: Issue a regular invoice. Don't label it a tax invoice, and don't show GST as being charged.

Two things get muddled here. Your obligation as the seller is to supply a tax invoice when one is requested, within that 28-day window. Your customer's need is documentation to support a GST credit claim, which is why the $82.50 threshold exists at all.

Tax invoice requirements in Australia: what must be included?

The ATO requires seven details² on a tax invoice for a taxable sale under $1,000. Sales of $1,000 or more need those seven plus one extra: the buyer's identity or ABN. Both thresholds use the GST-inclusive value of the sale.

If your template meets the requirements for sales of $1,000 or more, you can use it for smaller sales too. One template, one less decision per invoice.

1. The document is intended to be a tax invoice. The document must clearly show that it is intended to be a tax invoice. Using “Tax invoice” as the heading is clearest, but a document headed “Invoice” may still qualify if its contents make that intention clear.

2. The seller's identity. Your legal name, business name, or trading name – whichever identifies who made the sale.

3. The seller's ABN. Include the seller's 11-digit ABN on the tax invoice. If a supplier does not quote an ABN, separate PAYG withholding rules may require the payer to withhold tax.

4. The date the invoice was issued. The issue date, not the date the work was done or the goods delivered.

5. A brief description of the items sold. Include the quantity where it applies, and the price. Vague line items slow approvals and invite disputes.

6. The GST amount payable, if any. Show it separately, or use a "Total price includes GST" statement where the conditions are met.

7. The extent to which each sale is a taxable sale. The requirement businesses most often skip. Your invoice meets it if it shows the GST amount for each item, or clearly states the total price includes GST.

For sales of $1,000 or more, add the buyer's identity or ABN. That's the only extra field the ATO requires at the higher threshold.

How to show GST on the invoice

There are two accepted ways to present GST, and which you use depends on the mix of items on the invoice.

• Show GST separately. Display the GST amount by line item, or as a clear GST total alongside the subtotal and total payable. This is the safer default, and the only workable option once your invoice includes anything that isn't taxable.

• Use a "Total price includes GST" statement. Only available where the ATO's condition is met – the GST amount must be exactly one-eleventh of the total price. That's the case when every item on the invoice is a taxable sale.

An illustrative example: you invoice a client $330 for a fully taxable service. The GST is $30, exactly one-eleventh of $330, and the GST-exclusive value is $300. You could show "GST: $30" as a separate line, or state "Total price includes GST". Both satisfy the requirement. This example is illustrative only, not a substitute for advice from your accountant.

What if the invoice includes GST-free or input-taxed items?

Plenty of invoices mix taxable sales with GST-free or input-taxed items. A mixed invoice must clearly identify which items are taxable, show the GST amount to be paid, and show the total amount to be paid. The "Total price includes GST" shortcut isn't available, because GST won't be exactly one-eleventh of the total.

The trap is applying 10% across the whole invoice. On a mixed supply, GST applies only to the taxable items. Whether a specific item is taxable, GST-free, or input-taxed depends on the supply, so check the ATO's guidance or ask your accountant before setting up your template.

Digital invoices and eInvoicing in Australia

eInvoicing is an automated, machine-readable way to exchange invoice data directly between a supplier's and buyer's software. Emailing a PDF is a digital invoice, but it is not eInvoicing. 

Three formats get lumped together, and the differences matter:

• PDF or other digital invoice. This is valid as a tax invoice as long as it contains the required information and you can retain it as a record. This is how most Australian businesses invoice.

• Structured eInvoice. Invoice data is exchanged directly between the seller's and buyer's accounting systems – no document to open, no re-keying at the other end.

• Peppol eInvoicing. Peppol is the international framework and network Australia has adopted for structured eInvoicing, with the ATO acting as the Australian Peppol Authority. A compliant eInvoice can satisfy the tax-invoice requirement without displaying the words “Tax invoice” when it follows the relevant A-NZ specification and contains the mandatory data.

The case for eInvoicing is straightforward: less manual data entry, faster delivery, better traceability, and easier reconciliation. The Australian Treasury cites Deloitte Access Economics, estimating that every eInvoice replacing a paper or emailed PDF can deliver up to $20 in shared savings between the businesses involved³.

There is no general requirement for all Australian businesses to use eInvoicing. Australian Government entities are working with suppliers to increase use to 30% of invoices received by 1 July 2026 and to enable automated processing and sending by December 2026.

What payment methods can you include on a tax invoice?

Payment instructions aren't on the ATO's list of required fields, but they are a high-value addition to your invoice. Every minute your customer spends working out how to pay is a minute your invoice sits unpaid. Here are some payment methods worth including:

• Bank transfer: Account name, BSB, and account number, with the invoice number as the reference.

• Card payment: Offer card payments where they fit your customers and payment setup.

• Digital payment link: A URL or QR code the customer can pay through directly from the invoice.

• Direct debit or recurring payment: Where relevant and authorised by the customer.

• Other locally relevant payment methods: There are a number of local payment methods you may be able to offer, particularly for overseas customers.

This is where Airwallex Invoicing can add a digital payment link to the invoice, supporting cards, bank transfers and 160+ local payment methods, subject to product availability, account configuration and applicable fees.

How can you correct an invoice?

To correct an invoice, first identify whether the change is administrative, financial or GST-related, or concerns payment terms. The appropriate treatment depends on what changed and whether the invoice has already been reported.

• Minor administrative details. A misspelt customer name, an old email address, a purchase order reference, or a clearer item description. Nothing about the money changes.

• Financial or GST changes. An incorrect price, quantity, GST amount, or taxable status, plus refunds, returns, and agreed discounts. These affect what's payable and how the sale is reported.

• Payment-term changes. Shifting a due date or adding a late fee should be documented and should match the terms you agreed. Don't quietly rewrite the original invoice.

Here’s a generally safe process to correct an invoice: 

1. Identify what's wrong, and whether the invoice has been paid, partly paid, or already reported.

2. Keep the original record. Don't delete the invoice, and don't reuse its number.

3. For a financial or GST change, use an adjustment note where the change creates an adjustment. A credit note and replacement tax invoice may be used together in some cases; reference the original and check the BAS treatment.

4. Tell your customer what changed and what's now payable or refundable.

5. Check the GST and business activity statement (BAS) treatment with your accountant where the change affects a reported period.

The right treatment depends on your circumstances and how your accounting system handles adjustments. 

Tax invoice record keeping and common mistakes

The ATO requires most business records, including invoices and the documents supporting them, to be kept for at least five years⁴. Records can be paper or electronic – what matters is that they stay complete, legible, secure, and retrievable for that whole period.

Electronic record-keeping can be the easier path. A cloud accounting system or invoicing platform keeps the record, audit trail, and payment history in one place, and invoice processing automation removes most of the manual filing that makes five-year retention painful.

The mistakes that cause the most trouble:

• Calling an invoice a "tax invoice" when your business isn't registered for GST.

• Showing GST when you're not registered, or when the supply isn't taxable.

• Omitting or mistyping your ABN.

• Leaving the buyer's identity or ABN off a sale of $1,000 or more.

• Failing to distinguish taxable from non-taxable items on a mixed invoice.

• Using vague descriptions, incorrect quantities, or totals that don't add up.

• Overwriting or deleting an issued invoice instead of keeping a clear adjustment trail.

Deleting or overwriting an issued invoice can weaken the audit trail. Retain the original and record the adjustment instead.

Recipient-created tax invoices: when do they apply?

A recipient-created tax invoice (RCTI) is a tax invoice created by the buyer, or recipient, rather than the supplier. It applies in specific industries and arrangements, not as a general alternative to normal invoicing.

The ATO's conditions are that:

• Both the supplier and the recipient are registered for GST when the RCTI is issued.

• The parties have a current written agreement allowing the recipient to issue RCTIs, under which the supplier won't issue a tax invoice for the same supply.

• The supply is covered by the applicable ATO determination.

• The RCTI must contain the required tax-invoice information, identify itself as a recipient-created tax invoice, show the supplier's and purchaser's ABNs, and, where GST is payable, show that the supplier is liable for it.

If an RCTI arrangement might apply to your business, check the ATO's guidance and talk to your adviser before setting one up.

Why businesses choose Airwallex for invoicing

Getting the compliance right is one job. Getting paid, chasing what's overdue, and reconciling it all is another – and that's where the hours go. Airwallex Invoicing handles the operational side for Australian businesses that invoice across entities, currencies, and markets.

Create and send without the admin

• Create and send invoices across multiple entities and in 130+ currencies through a no-code interface.

• Automate delivery with scheduled sending, notifications, and payment reminders.

Get paid the way your customers want to pay

• Accept payments through digital invoice links, supporting cards, bank transfers and 160+ local payment methods, subject to product availability, account configuration and applicable fees.

• Reduce failed payments with automated retries and notifications, up to four retry attempts.

• Receive like-for-like settlements in supported original currencies, cutting unnecessary foreign exchange conversions.

Keep the books clean

• Track invoice status in real time across outstanding, overdue, and paid.

• Reconcile payments against invoices automatically, with funds settling into your Airwallex account.

• Issue credit notes and refunds to correct billing errors or resolve disputes, keeping a record of the adjustment.

Invoicing connects to the rest of your cash flow – multi-currency wallets, card spend, bill payments, and expenses – so collections and outgoings live in one place. For recurring charges, billing and recurring revenue management runs through Subscription Management, and it's worth comparing your options against other small business invoice software before you commit.

Airwallex streamlines the operational side of invoicing, while your business remains responsible for the accuracy of its tax treatment and invoice details.

Frequently asked questions

What must be included on a tax invoice in Australia?

For a taxable sale under $1,000, the ATO requires seven details: that the document is intended to be a tax invoice, the seller's identity and ABN, the issue date, a description of the items sold with quantity and price, the GST amount payable, and the extent to which each sale is taxable. Sales of $1,000 or more also need the buyer's identity or ABN.

Do I need to provide a tax invoice for a sale under $82.50?

Generally no. For a taxable sale of $82.50 or less including GST, your customer doesn't need a full tax invoice to claim a GST credit, according to the ATO. Keep an appropriate record, such as a receipt or register docket, and issue a tax invoice if you'd prefer to.

What is the difference between an invoice, tax invoice, and receipt?

An invoice requests payment. A tax invoice is issued by a GST-registered business for a taxable sale and contains the GST information the ATO requires. A receipt confirms payment, and only counts as a tax invoice if it includes all the required details.

Can I issue a tax invoice if I am not registered for GST?

No. Only GST-registered businesses issue tax invoices. If you're not registered, issue a regular invoice: don't use the words "tax invoice" and don't show GST. The ATO's guidance on business invoices sets out what it should contain.

Can I send a tax invoice by email or use eInvoicing?

Yes to both. An emailed PDF is a valid tax invoice if it contains the required information and can be kept as a record. Peppol eInvoicing is different – it exchanges structured data between accounting systems and can satisfy the tax invoice requirement when issued under the relevant specification.

How long do I need to keep tax invoices?

At least five years. The ATO requires most business records, including invoices and supporting documents, to be kept for five years. Paper and electronic records are both fine, as long as they stay complete, legible, secure, and retrievable.

How do I correct an incorrect tax invoice?

Keep the original record and do not reuse the invoice number. For a minor administrative correction, a corrected tax invoice may be appropriate. For a change to price, quantity or GST treatment, use an adjustment note where required; a credit note and replacement invoice may be used together in some cases. Check the GST and BAS treatment with your registered tax or BAS agent.

Sources

1. https://treasury.gov.au/consultation/c2020-122716 

2. https://www.ato.gov.au/businesses-and-organisations/gst-excise-and-indirect-taxes/gst/tax-invoices 

3. https://treasury.gov.au/consultation/c2020-122716 

4. https://www.ato.gov.au/businesses-and-organisations/preparing-lodging-and-paying/record-keeping-for-business/overview-of-record-keeping-rules-for-business

5. https://www.ato.gov.au/businesses-and-organisations/preparing-lodging-and-paying/record-keeping-for-business/setting-up-and-managing-records/setting-up-your-business-invoices  

6. https://www.airwallex.com/en-au/billing