Company: WEBNF
Filing Date: 2025-06-26
Form Type: 424B5
Source: 0001104659-25-062718
Chunk: 105

Company: WESTPAC BANKING CORP
Filing Date: 2025-06-26
Form: 424B5
Chunk 105
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 TERMS OF ISSUE OF ANY SERIES OF SENIOR DEBT SECURITIES MAY AFFECT THE TAX TREATMENT OF THAT AND OTHER SERIES OF SENIOR DEBT SECURITIES. HOLDERS SHOULD CONSULT THEIR PROFESSIONAL ADVISERS.

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TABLE OF CONTENTS

#### Australian interest withholding tax (“IWT”)
Generally, payments of principal and interest on the Senior Debt Securities made by Westpac to a Holder that is not a resident of Australia for Australian tax purposes (a “Non-Resident”) (other than one deriving the interest in carrying on business in Australia at or through a permanent establishment in Australia) will not be subject to Australian taxes or duties other than IWT at a rate of 10% of the amount of an interest payment. However, IWT will not be payable if an exemption applies.

For IWT purposes, “interest” is defined to include amounts in the nature of, or paid in substitution for, interest and certain other amounts. Any premium or issue discount would be interest for these purposes.

There are also specific rules that can apply to treat a portion of the purchase price of the Senior Debt Securities as interest for IWT purposes when Senior Debt Securities that are originally issued at a discount, or with a maturity premium, or which do not pay interest at least annually, are sold by a Non-Resident (other than one holding the Senior Debt Securities as part of a business carried on by it at or through a permanent establishment in Australia) to:

•

a resident of Australia for Australian tax purposes (a “Resident”) that does not acquire them in carrying on business at or through a permanent establishment in a country outside Australia; or

•

a Non-Resident that acquires them in carrying on business in Australia at or through a permanent establishment in Australia.

Exemption from IWT under section 128F of the Australian Tax Act (“section 128F”)

Interest on the Senior Debt Securities will be exempt from IWT if the requirements of section 128F are satisfied in relation to the Senior Debt Securities.

Westpac proposes to issue the Senior Debt Securities in a manner which will satisfy the requirements of section 128F.

The exemption from IWT available under section 128F is not intended to apply to related party loans. In particular, in order for that exemption to apply, Westpac must not have known or had reasonable grounds to suspect, at the time of their issue, that any of the Senior Debt Securities, or an interest in the Senior