What the ATO expects on a tax invoice

An invoice that isn't a valid tax invoice is a problem twice over. Your customer can't claim the GST credit on it, so they send it back — and you've turned a job you finished into a conversation you have to have. Getting it right is a five-minute change to a template you use every day.

The seven things every tax invoice must show

For a sale of less than $1,000, a tax invoice has to make all of the following clear:

1. 1That it is a tax invoice. The words "Tax invoice" on the document. Not "Invoice", not "Statement".
2. 2Who is selling. Your business or trading name.
3. 3Your ABN. The eleven digits, conventionally shown in the grouped format — 51 824 753 556.
4. 4The date it was issued. Not the date of the job. The date you raised the document.
5. 5What was sold. A brief description of each item, with quantity and price. "Electrical work — $1,400" is not a description.
6. 6The GST amount. Either shown as its own line, or covered by a statement that the total price includes GST.
7. 7Which items include GST. If everything on the invoice is taxable, "Total price includes GST" does the job. If some lines aren't, each line has to show where the GST sits.

What changes at $1,000

Once the sale is $1,000 or more, one thing is added: the invoice has to identify the buyer as well — either their name or their ABN.

The mistakes that actually get invoices sent back

Calling it an "Invoice"

The single most common one, and the easiest to fix. If you are registered for GST and you are charging GST, the document has to say tax invoice. A bookkeeper processing a hundred of these a week is looking for that phrase.

A description nobody can match to a job

"Labour and materials" tells the person paying nothing. It also tells you nothing in eighteen months when someone queries the job. Itemise: what you did, how many hours, what parts went in.

GST arithmetic that doesn't add up

GST in Australia is 10%. If your subtotal is $1,400 excluding GST, the GST is $140 and the total is $1,540. The rounding errors creep in when a quote was priced GST-inclusive and then converted — decide which way your prices are quoted and keep every document consistent with it.

Zero-rated lines treated as taxable

Not everything you on-charge attracts GST. A statutory fee you pass through at cost may not. If your invoice has a mix, requirement seven applies and each line has to show its own GST treatment — a flat "includes GST" footer is wrong.

No ABN

Without your ABN on the document it isn't a tax invoice, and your customer may be required to withhold tax from the payment. This is the one that costs you money rather than time.

What about a quote?

A quote isn't a tax invoice and doesn't need to meet these rules — but the GST needs to be just as clear, because the argument you don't want is the one where the customer thought the number was inclusive and you meant it exclusive. State it on the quote, in words, next to the total.

Keeping it right without thinking about it

None of this is hard. It's just seven things that have to be on a document you produce dozens of times a month, and the failure mode is that one of them quietly drops off a template and nobody notices for a quarter.

BizzMate builds the invoice from the job: your ABN and business details come from your organisation profile, the line items come from the labour and materials recorded on site, and the GST is calculated per line — so a zero-rated item stays zero-rated all the way to the PDF. The document says "Tax invoice" because it is one.