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We use purchase orders to approve, manage and make payment for all purchases:

  • over $500 (plus GST)
  • made under a contract or agreement.

Purchase order numbers

You need an Inland Revenue purchase order number if you supply goods or services over the $500 (plus GST) threshold. You can get the number from the Inland Revenue contact who requested the goods or services.

We will return any invoices for a supply over $500 (plus GST) or for a supply made under a contract or agreement that don't have a valid purchase order number.

Tips to make sure your payment isn't delayed

  • Submit a complete and accurate invoice, ie, one that meets the requirements of the Goods & Services Tax Act 1985.
  • If your business is GST-registered, include your GST number and the words "Tax Invoice".
  • Include the name of your Inland Revenue contact who requested the goods and services as well as the purchase order number.
  • Make sure the purchase order matches the invoice exactly, including what was delivered, unit of measure, quantity and unit price.
  • Correct any discrepancies or changes before sending your invoice.

Sending us your invoices

We prefer to receive invoices electronically to our Accounts Payable team at

If you are unable to send your invoice electronically, you can send it to:

Inland Revenue
Accounts Payable
PO Box 2198

Send any accounts payable queries to