Getting paid as a corporate supplier

We’re making changes to the way we pay for goods and services, so that suppliers can get paid faster and more reliably.

Please note that the changes don’t apply to health services under health contracts, and services covered by the Cost of Treatment Regulations (CoTR). 

Invoices need to include purchase order (PO) number

For all goods purchased or services provided from 1 July 2026, invoices submitted to ACC must include a valid purchase order (PO) number. The PO number should be clearly displayed at the top of the invoice.

We will provide the PO number at the time we request the goods or services, whether there is a contract in place or not.  

If you haven’t received a PO number, please contact your ACC representative before invoicing.  

Invoices submitted without a valid PO number may be delayed.  

Benefits of purchase orders  

Using purchase orders helps ensure that: 

  • you get paid faster 
  • invoices match approved goods and services  
  • manual processing is reduced.  
Goods and services described on your invoice should match exactly what is described on your PO, including description of goods delivered, unit of measure, quantity, and unit price. Invoices should be emailed to:

Email Accounts.Payable@acc.co.nz

Please ensure ACC's NZBN (9429041900253) is recorded in your customer records to support accurate and efficient processing, including eInvoicing, and that all invoices meet GST requirements. 

Visit | IRD - taxable supply information for GST

eInvoicing is now available

We now accept eInvoicing and encourage eligible suppliers to use it to submit invoices, making payments faster, safer, and more efficient.  

What is eInvoicing? 

eInvoicing lets you send invoices directly from your system to ours. You don’t need to email invoices or enter details manually.  

What you need to get started 

To get set up for eInvoicing with ACC, email Purchasing@acc.co.nz

You will need: 

  • your finance system (or provider) must be capable of sending eInvoices.  
  • a New Zealand Business Number (NZBN) 
  • accounting software that supports eInvoicing 
  • a valid purchase order number on your eInvoices. 

Everything you need to know to about eInvoicing, including how to get set up, is available at the eInvoicing government website. 

Visit | eInvoicing.govt.nz

Benefits of eInvoicing

With eInvoicing, you get:

  • faster payments as invoices go straight to the right place
  • less manual handling so fewer errors and delays
  • more secure invoice delivery. 

Ready to register?

If you would like to register for eInvoicing with ACC, please contact us.

Email purchasing@acc.co.nz

Need help? 

We’re here to help. If you have any questions about using purchase orders or payment terms, get in touch with your ACC contact or our Commercial Procurement.

Email  purchasing@acc.co.nz

Last published: 24 June 2026