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GST claims depend on records — Australia vs New Zealand (tax invoices vs evidence)

· 4 min read
Shan Xiao
Developer & Bookkeeping Learner

When you design or review a GST process, the control you implement should match the legal evidence standard.

1 One-line conclusion:​

In Australia, claiming GST credits usually hinges on holding a valid tax invoice (especially above the A$82.50 threshold).
while in New Zealand, claiming GST relies on keeping sufficient taxable supply information, which can be supported by a combination of records rather than a single “tax invoice” document. (Australian Taxation Office)

2 New Zealand (IRD): Evidence standard = “taxable supply information”​

1) You must keep taxable supply information to support GST expense claims (and taxable supplies)​

IRD states GST-registered customers should keep taxable supply information to support expense claims and for taxable supplies. (Inland Revenue)

2) Evidence does not need to be a single “tax invoice” document; a combination of records can support the GST return​

IRD explicitly allows a combination of records to support the figures in GST returns. (Inland Revenue)

3) If requested, taxable supply information must be provided within 28 days for supplies over NZ$200​

IRD explains that taxable supply information must be provided to GST-registered buyers within 28 days of a request (or a mutually agreed alternative date) for supplies over NZ$200. (Inland Revenue)

4) The required information depends on the value of the supply​

IRD states that information requirements depend on the value and type of supply. (Inland Revenue)

5) You can use practical evidence types such as invoices/receipts and other documentation​

IRD’s GST guide notes you should provide taxable supply information such as an invoice, receipt, or other documentation when selling goods or services. (Inland Revenue)

6) For low-value supplies (≤ NZ$200), suppliers may not need to issue taxable supply information, but both parties must keep records​

IRD’s GST guide explains that if the sale is NZ$200 or less, the supplier does not need to provide taxable supply information to the buyer, but both the supplier and a registered buyer must keep their own records for GST record-keeping requirements. (Inland Revenue)

3 Australia (ATO): Evidence standard = “valid tax invoice” (for GST credits)​

1) To claim GST credits for purchases over A$82.50 (incl. GST), you must have a tax invoice​

ATO states you must have a tax invoice to claim a GST credit for purchases that cost more than A$82.50 (including GST). (Australian Taxation Office)

2) If you request a tax invoice, the supplier generally must provide it within 28 days (with an exception for small sales)​

ATO explains that if a customer asks for a tax invoice, the supplier must provide one within 28 days, unless the sale is A$82.50 (including GST) or less. (Australian Taxation Office)

3) The tax invoice must be “valid” — missing details can invalidate it for GST credit claims​

Australian government guidance notes the buyer must have a valid tax invoice to claim GST credits, and if an invoice is wrong or missing details, it’s not valid and should be replaced with a correct one when requested. (business.gov.au)

4) BAS preparation guidance reinforces the same control: only claim GST credits when you hold required tax invoices​

ATO BAS tips explicitly remind businesses to only claim GST credits if you have tax invoices for purchases over the A$82.50 (incl. GST) threshold. (Australian Taxation Office)

If you want, tell me whether your product flow is claim validation (per-transaction eligibility) or return aggregation (period totals). I can turn the above into a checklist/matrix your system can apply to Xero data (AU/NZ) without hardcoding a single template.