A tax invoice is a document a GST-registered business issues for a taxable sale. It must show the words "tax invoice", the seller's identity and ABN, the date of issue, a description of what was sold, the GST amount and the total price, so the buyer can claim GST credits.
If the sale is $1,000 or more (including GST), the invoice must also show the buyer's identity or ABN. Get any of these elements wrong and your customer may be unable to claim their GST credit, and you could face compliance issues with the Australian Taxation Office (ATO).
This guide walks through the ATO's tax invoice requirements in full: the seven-element checklist, the $82.50 and $1,000 thresholds, how to create a compliant invoice step by step, what changes if you are a sole trader who is not registered for GST, and the less common recipient-created tax invoice (RCTI).
What Is a Tax Invoice?
A tax invoice is not just any invoice. In Australia it is a specific document defined under the GST legislation and administered by the ATO. It serves two purposes: it tells your customer how much GST they are paying, and it is the evidence a GST-registered buyer needs to claim GST credits (also called input tax credits) on their business purchases.
Three rules from the ATO frame everything else in this guide:
- The $82.50 rule. If you are registered for GST, you must give a customer a tax invoice for any taxable sale over $82.50 (including GST) when they ask for one. The figure is simply $75 plus 10 per cent GST. At or below $82.50, no tax invoice is required (though you still need to record the sale).
- The 28-day rule. Once a customer requests a tax invoice, you have 28 days to provide it.
- The $1,000 rule. Sales of $1,000 or more (including GST) need one extra piece of information: the buyer's identity or ABN.
If you are not registered for GST, these rules work differently for you: you issue regular invoices without GST, covered in the sole trader section below.
The 7-Element ATO Tax Invoice Checklist
For taxable sales under $1,000, the ATO requires a tax invoice to show seven pieces of information:
- The words "tax invoice", displayed prominently, usually as the document heading
- The seller's identity: your business name or trading name
- The seller's ABN (Australian Business Number)
- The date the invoice was issued
- A brief description of the items sold, including the quantity (if applicable) and the price
- The GST amount payable, shown separately for each line, or a statement such as "Total price includes GST" if GST is exactly one eleventh of the total
- The extent to which each sale is taxable: which items on the invoice include GST, which matters when you sell a mix of taxable and GST-free items
For sales of $1,000 or more (including GST), add an eighth element: the buyer's identity or ABN.
That is the complete list, taken directly from the ATO's tax invoices page. You can produce a document that ticks every box in under a minute with the free tax invoice generator, which lays out all of these fields by default.
Tax Invoice vs Regular Invoice: What's the Difference?
A regular invoice is simply a request for payment. It can contain whatever you like; a handwritten note technically counts.
A tax invoice is a legally defined document. It must contain the specific information prescribed by the ATO above. The key difference is that a tax invoice enables the recipient to claim GST credits, while a regular invoice does not.
If you are not registered for GST, you issue regular invoices and should not show a GST amount. If you are registered, every invoice for a taxable sale should be a valid tax invoice.
The Under and Over $1,000 Rule
The dollar value of the sale determines how much detail the ATO expects. There are three bands:
- $82.50 or less (including GST): no tax invoice is required at all, although you must still keep a record of the sale (a receipt, docket or cash register tape is enough).
- Over $82.50 and under $1,000: the seven standard elements above are required.
- $1,000 or more (including GST): the seven elements plus the buyer's identity or ABN.
The extra requirement at $1,000 exists because larger transactions carry larger GST credit claims, so the ATO wants the invoice to identify who is claiming the credit. "Identity" can be the buyer's name, business name or address; in practice most businesses record the customer's name and address on every invoice regardless of value, which keeps every document compliant automatically.
Example: Invoice Under $1,000
A graphic designer invoices $550 (including GST) for a logo design. The tax invoice needs the seven standard elements but does not need the buyer's name, ABN or address.
Example: Invoice of $1,000 or More
An electrician invoices $2,200 (including GST) for a switchboard upgrade. This invoice must include all seven standard elements plus the buyer's identity or ABN. Leaving the customer's details off is one of the most common ways a large invoice quietly fails the ATO's requirements.
How to Do an Invoice: Step by Step
If you are writing your first invoice, or want to sanity-check your current process, here is the fastest compliant path:
- Start from a compliant layout. Build the document in the free invoice generator, which produces an ATO-compliant tax invoice in your browser with no signup, or download one of the free Australian invoice templates if you prefer to work in Word, Excel or Google Docs. Both are structured around the checklist above, so the required fields are already in place.
- Add your business details. Your business or trading name and your ABN. If you are registered for GST, the document heading must read "Tax Invoice".
- Number and date the invoice. An invoice number is not a GST requirement, but sequential numbering is standard practice, makes payments easier to reconcile and gives you a clean audit trail. The issue date, however, is mandatory.
- Describe what you sold. One line per item or service, with the quantity and price. "Services rendered" is not a description; "Switchboard upgrade: supply and install 12-way board" is.
- Show the GST. Either display the GST amount for each line, or state that the total price includes GST when GST is exactly one eleventh of the total. If you need to check the maths, the GST calculator splits any inclusive or exclusive figure into its GST and net components.
- Add the buyer's details for sales of $1,000 or more. Their name or business name, and their ABN for business-to-business sales.
- Add payment details and terms. Your bank details (BSB and account number or PayID), the due date and any payment terms. These are not ATO requirements, but an invoice without them gets paid slower.
- Send it and keep a copy. Email or electronic delivery is fully valid. Keep the copy for five years.
Once you are sending more than a handful of invoices a month, a template stops scaling: numbering, GST, payment tracking and follow-ups all become manual work. That is the point where dedicated Australian invoicing software pays for itself.
Sole Traders Not Registered for GST
You only have to register for GST once your GST turnover reaches $75,000 a year (or from day one if you drive taxis or ride-share). Below that threshold, registration is optional, and most new sole traders start out unregistered. If that is you, four rules apply:
- Do not issue "tax invoices". Head your document "Invoice", not "Tax Invoice". Only GST-registered businesses may issue tax invoices.
- Do not show GST. Do not add 10 per cent, and do not print a GST line. Your invoice shows the price and the total, and can carry a note such as "No GST has been charged" so business customers know there is no credit to claim.
- Always include your ABN. This one is easy to miss. Under the ATO's withholding from suppliers rules, a business paying an invoice that has no ABN on it may be required to withhold 47 per cent of the payment and send it to the ATO.
- Watch the threshold. Once your rolling 12-month turnover hits (or you expect it to hit) $75,000, you must register within 21 days. From that point your invoices become tax invoices and everything earlier in this guide applies.
The same step-by-step process above works for unregistered sole traders; you simply skip the GST elements and change the heading.
Recipient-Created Tax Invoices (RCTI)
In some industries the buyer creates the tax invoice instead of the seller. This is common where the buyer determines the value of the goods after delivery: agriculture (a mill or processor weighing and grading produce), sugar cane crushing, and scrap metal are the classic examples.
An RCTI is only valid when both parties are registered for GST, there is a written agreement between them that the recipient will issue the invoices, and the document is titled "Recipient-Created Tax Invoice" rather than "Tax Invoice". The content requirements otherwise mirror a standard tax invoice, including showing the seller's ABN and the GST amount. The ATO's tax invoice guidance covers the agreement requirements in detail. Most small businesses never need to issue one, but if a buyer sends you RCTIs, do not invoice them as well: one document per sale.
Common Tax Invoice Mistakes
1Forgetting the Words "Tax Invoice"
It sounds trivial, but if your document doesn't say "Tax Invoice" on it, it technically isn't one. Many generic invoice layouts default to just "Invoice"; check yours.
2Missing or Incorrect ABN
Every tax invoice must show the seller's ABN. If you are issuing invoices without your ABN, the payer may be required to withhold 47 per cent of the payment under the no-ABN withholding rules and send it to the ATO.
3Not Showing GST Separately
You must either show the GST amount for each line item or include a statement that the total price includes GST. Simply writing a total with no GST reference is not compliant.
4Using an Old ABN or Business Name
If you have changed your business structure or name, make sure your invoices reflect the current registered details. Outdated information can cause problems during ATO audits.
5Omitting Buyer Details on Large Invoices
For invoices of $1,000 or more, forgetting the buyer's identity or ABN is a common oversight that invalidates the tax invoice for GST credit purposes.
6Issuing a Tax Invoice When Not GST-Registered
If you are not registered for GST, you must not issue a tax invoice or show GST amounts. Doing so is misleading and can result in penalties.
Digital Tax Invoices and Record Keeping
The ATO accepts electronic tax invoices: PDFs, emailed invoices and software-generated invoices are all valid, provided they contain the required information. There is no requirement for a paper document.
Digital invoices are actually preferable because they are easier to store, search and back up for the mandatory retention period. Under the ATO's record-keeping rules for business, records that explain your GST transactions, including every tax invoice you issue and receive, must be kept for five years.
How OneBookPlus Keeps Your Invoices Compliant
OneBookPlus is an all-in-one Australian business platform: bookings, quotes, invoicing, jobs, CRM and accounting in one place, hosted on AWS in Sydney. It is GST-, ABN- and BAS-native, so tax invoices are correct by default rather than something you assemble by hand. When you create an invoice:
- The document is labelled "Tax Invoice" automatically
- Your ABN is displayed from your business profile
- GST is calculated and shown on every line item
- For invoices over $1,000, client details including name and ABN are included
- The date, description, quantities and totals are all formatted correctly
- Invoices are stored digitally for easy retrieval and the five-year record-keeping rule
You never have to worry about missing a field or getting the format wrong. Every invoice you send from OneBookPlus is ATO-compliant from the moment you hit send, and because there is a genuinely free plan with flat, predictable pricing, you can start without a card. See how it compares as dedicated Australian invoicing software, or explore the fit for tradies, electricians and freelancers and sole traders.
Frequently Asked Questions
What must be included on an Australian tax invoice?
A tax invoice for a sale over $82.50 (including GST) must show the words "tax invoice", the seller's identity and ABN, the date of issue, a description of the items sold with quantity and price, the GST amount (or a note that the total price includes GST), and the extent to which each sale is taxable. For sales of $1,000 or more, it must also show the buyer's identity or ABN.
What extra information does a tax invoice for $1,000 or more need?
When the total sale is $1,000 or more (including GST), the tax invoice must also show the buyer's identity or ABN, on top of the seven standard elements. In practice most businesses record the customer's name and address on every invoice regardless of value.
Do I have to issue a tax invoice for small sales?
No. You are not required to provide a tax invoice for taxable sales of $82.50 (including GST) or less, though you can if the customer asks. For sales above that amount, you must provide one within 28 days of a customer's request.
Can I issue a tax invoice if I'm not registered for GST?
No. Only GST-registered businesses can issue tax invoices and charge GST. If you are not registered, issue a regular invoice headed "Invoice" with no GST shown. Charging GST or issuing a document titled "tax invoice" when you are not registered is misleading and can attract penalties.
What is a recipient-created tax invoice (RCTI)?
An RCTI is a tax invoice created by the buyer instead of the seller, common in industries such as agriculture where the buyer determines the value of the goods. It requires a written agreement between both GST-registered parties and must be titled "Recipient-Created Tax Invoice".
How long do I need to keep tax invoices?
The ATO requires you to keep records that explain all your GST transactions, including tax invoices, for five years. Electronic copies are acceptable as long as they are a true and clear copy of the original.
Get Started
Stop second-guessing whether your invoices are compliant. Build one now with the free tax invoice generator, download one of the free Australian invoice templates if you prefer Word or Excel, or start your free OneBookPlus plan: every invoice you send is ATO-compliant from the moment you hit send.
