Shopify GST invoices for Australia and New Zealand
AU & NZ GST invoices, exact to the cent. GST tax invoices for every order, and credit notes (adjustment notes in Australia) for every refund, for GST-registered Shopify stores. Discounts, exports, donations and partial refunds are printed exactly as Shopify charged them.
For GST-registered stores in Australia and New Zealand. US$8 a month, 7-day free trial, billed through Shopify.
Why a Shopify GST invoice has to match to the cent
We set up a test store and put real orders through Shopify. On each of the cases below, one of the obvious ways to work out GST gives a different answer from what Shopify actually charged. The figures shown are from our New Zealand run; we then ran Australian orders as well. An invoice that is one cent out does not reconcile with your Shopify reports.
Two of the same item
2 × $24.95. Shopify charged $6.51 GST. Worked out per item, it comes to $6.50.
A small price, three times
Three stickers at $1.50 plus a $9.95 item. Shopify's GST is $1.89. From the order total it is $1.88. Item by item it is $1.90.
A discount on the whole order
10% off a $949.95 board and a $24.95 wax. Shopify's line still reads $949.95, but GST was charged on $854.95. Printed side by side, they do not add up.
A New Zealand export to Australia
Shopify records no GST line at all, not even 0%. It states the zero rate rather than leaving a blank.
A donation in the cart
Shopify attaches "GST 15%: $0.00" to it. Printed as it is, that looks like a wrong rate. It shows the line as not taxable instead.
Refunding one item
Refund 1 of 3 stickers and Shopify returns $0.19 GST. The formula says $0.20. Its credit notes use the amount Shopify actually refunded.
Figures from our own New Zealand test store, orders #1001 to #1005, 26 September 2026. Prices include New Zealand GST at 15%. On 27 September 2026 we put seven Australian orders (#1006 to #1012) and four refunds through the same test store set to Australia. Two things came out of that run: an order carrying New Zealand's 15% GST on an Australian store is refused rather than printed as Australian GST, and "Total price includes GST" is printed only when the GST is exactly one-eleventh of the total.
Tax invoices, credit notes and adjustment notes for Shopify
Shopify orders and refunds turned into the documents GST-registered stores need, in the terms each country uses.
Tax invoice
One for every order. In Australia it carries your ABN, in New Zealand your GST number, with the GST taken from Shopify's own order record.
Adjustment note (Australia)
One for every refund, showing the GST adjustment against the original order. Australia calls this document an adjustment note.
Credit note (New Zealand)
The same document for a New Zealand store, with the New Zealand term and your GST number on it.
How the Shopify GST invoice app works
Read-only. It reads your orders and never changes them.
Shopify's own GST figures, line by line. No recalculating, so nothing drifts by a cent.
A tax invoice for every order and a credit note - an adjustment note in Australia - for every refund, with your ABN or GST number on it.
Download one PDF, or a ZIP of invoices for a whole date range. Sequential numbers, your logo and a footer note.
One price
US$8 a month
7-day free trial, then US$8 a month
One plan, every feature included.
Credit notes - adjustment notes in Australia - included, no extra charge.
No per-order charges.
Nothing locked behind a higher tier.
7-day free trial before you pay.
For GST-registered stores only. In New Zealand you must register once your turnover reaches $60,000 in 12 months; in Australia the threshold is A$75,000 turnover in any 12-month period (ato.gov.au). If you are not registered, this is not for you yet.
Install from the Shopify App StoreRead how your data is stored: privacy policy for this app.
Need something custom for your store?
We build custom Shopify apps, integrations, GST tax invoice setup, migrations and theme fixes for New Zealand and Australian merchants.
Questions
Install NullGlitch Tax Invoices from the Shopify App Store, enter your ABN or GST number in the settings, then download the invoice for any order as a PDF. For a whole month, download a ZIP for a date range instead.
Want Shopify GST invoices that match Shopify to the cent?
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