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Your Supplier Advocate

Your voice in The Westpac Group, helping you do business with us.

Westpac Group is transitioning to the Coupa platform.

Learn more about the Coupa transition

Supplier Advocacy Team

Westpac has a dedicated Supplier Advocacy function. The Westpac Supplier Advocate recognises the part our suppliers - particularly small and diverse suppliers - play in the community. 

The Supplier Advocate is the voice of suppliers within Westpac for: 

  1. Registering interest in supplying goods or services to Westpac,
  2. On-boarding new suppliers, including providing advice regarding the invoicing and payment process,
  3. Ensuring valid invoices are paid within 30 days, and obligations under the Australian Supplier Payment Code are met,
  4. Any queries, complaints, or escalations. 

Registering Interest in Supplying to Westpac 

Learn about how we work and what we look for when selecting a supplier in the Westpac Group Supplier Playbook (PDF 551KB).

Find more information here on how to be a supplier to The Westpac Group.

New Supplier Onboarding

Welcome to Westpac. We are excited to have you on board as a supplier! If this is your first time supplying to us, the Supplier Advocacy team is here to support you on your journey.

At Westpac, we have several payment platforms. To find the right payment platform for your business, contact the Supplier Advocacy Team

Invoice Payment

Westpac's procurement process includes upfront approval of spend via Purchase Orders (POs). POs are subject to Terms and Conditions (PDF 150KB).

Westpac is proudly a signatory to the Australian Supplier Payment Code, and fully support the proposed Payment Times Reporting Scheme. We commit to paying all suppliers within 30 days of receipt of a valid tax invoice. There are specific instructions for invoicing, depending on the payment platform assigned to your business. Please contact the Supplier Advocacy Team if you require clarification. 

Additional information regarding invoicing and payment processes can be found here: Payment Platforms.

Feedback, Complaints or Escalations


General supplier feedback, complaints, or escalations can be directed to the Supplier Advocacy Team

If your feedback, complaint or escalation relates to an invoice please provide the following information:

  1. Invoice details (invoice number, date, value);
  2. Your preferred contact details; and
  3. A brief description of relevant details.

In addition to the Supplier Advocacy channel, please note the Westpac Whistleblower Policy.

Westpac Whistleblower Policy

Westpac has a dedicated Whistleblower Channel which allows suppliers (including their current and former employees) who have knowledge of, or reason to suspect, any reportable conduct which involves Westpac, and anyone connected within the Westpac Group to confidentially raise their concerns. Reports can be completely anonymous, or you can identify yourself to those authorised by Westpac to manage such reports. More details can be found here: Speaking Up Policy (PDF 320KB) or search “Speaking Up Policy” at

Broadly, “reportable conduct” under our policy includes any conduct which is dishonest, corrupt, fraudulent, or illegal, including any suspected modern slavery or human rights violations, involving Westpac’s operations or supply chain where it has significant implications for Westpac. Safely report such conduct via our Speak Up reporting system at or by calling a dedicated 24-hour independent Whistleblower Hotline: 1800 989 569 (an Australian free-call number), which is operated by a third party. The telephone numbers for the 24-hour independent Whistleblower Hotline available in other jurisdictions are set out in the policy.