What makes an invoice a valid tax invoice in Australia?

For sales over A$82.50 (GST-inclusive) a tax invoice must show the words 'Tax invoice', the supplier's identity and ABN, the date, a description of the items, the GST amount (or a statement that GST is included), and the buyer's identity or ABN for sales over A$1,000. This tool includes all of those elements.

How is the 10% GST calculated?

GST in Australia is 10%. If your prices are GST-exclusive, GST equals the subtotal multiplied by 0.10. If your prices already include GST, the GST component is the total divided by 11. This tool handles both modes correctly.

Do I need an ABN to issue a tax invoice?

Yes. Only a registered business with an ABN can issue a tax invoice and charge GST. If you are not registered for GST you can still issue a regular invoice, but you must not label it a 'tax invoice' or charge GST.

What are BSB and account number for?

BSB (Bank-State-Branch) is a 6-digit code identifying an Australian bank branch, and the account number identifies the account within that branch. Together they let your customer pay you by direct bank transfer (EFT).

Is my invoice data stored anywhere?

No. All calculations happen in your browser and your draft stays in your own browser only. Nothing is uploaded or shared.

Australian Invoice Builder

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A compliant Australian tax invoice in under a minute

Australian Taxation Office (ATO) rules are specific about what a valid tax invoice must contain — the words “Tax invoice”, your ABN, the GST amount, and the buyer’s identity for larger sales. This builder includes every required field, calculates the 10% GST correctly whether your prices are inclusive or exclusive of GST, and adds BSB and account number fields so customers can pay you by EFT.

How it works

GST in Australia is a flat 10%. The tool supports two modes:

GST-exclusive prices: each line price is the pre-tax amount. GST equals subtotal × 0.10, and the total is subtotal + GST.
GST-inclusive prices: each line price already contains GST. The GST component is extracted as total ÷ 11 (because the total is 110% of the pre-tax value), and the displayed subtotal is total − GST.

It sums your line items (quantity × unit price), applies any optional discount before GST, then derives the GST line and grand total. For sales of A$1,000 or more the customer’s identity is required, so a reminder appears when the total crosses that threshold.

Tips and notes

Always show your 11-digit ABN — without it, customers must withhold 47% of the payment under the “no ABN withholding” rule.
The phrase “Tax invoice” must appear; this tool puts it at the top of the output automatically.
Use GST-inclusive mode for retail/consumer pricing, and GST-exclusive for B2B quotes where buyers expect the pre-tax figure.
BSB codes are six digits, usually written XXX-XXX; the tool keeps whatever format you enter.