Company: WEBNF
Filing Date: 2025-06-26
Form Type: 424B5
Source: 0001104659-25-062718
Chunk: 30

Company: WESTPAC BANKING CORP
Filing Date: 2025-06-26
Form: 424B5
Chunk 30
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<div align='center'>S-15</div>

TABLE OF CONTENTS

on the fixed rate notes semi-annually in arrears on January 1 and July 1 of each year, subject in each case to the business day fixed rate convention set forth below, beginning on January 1, 2026, until the fixed rate notes shall have been paid in full. Interest on a fixed rate note will be paid to the person in whose name that fixed rate note was registered at the close of business on the December 17 or June 16, as the case may be, whether or not a business day, prior to the applicable interest payment date, except in the case of the interest payment date that is also the date of maturity of such fixed rate note. The amount of interest on the fixed rate notes payable for any period less than a full interest period shall be computed on the basis of a 360-day year consisting of twelve 30-day months and the actual days elapsed in a partial month in such period. Any payment of principal or interest required to be made on an interest payment date that is not a business day will be made on the next succeeding business day, and no interest will accrue on that payment for the period from and after the interest payment date to the date of payment on the next succeeding business day.

For purposes of the fixed rate notes, “business day” means each Monday, Tuesday, Wednesday, Thursday and Friday that is not a day on which banking institutions in Sydney, Australia, New York, New York, or London, United Kingdom are authorized or obligated by law or executive order to close.

Floating Rate Notes

The floating rate notes will bear interest from July 1, 2025, or from the most recent floating rate interest payment date (as defined below) to which interest has been paid or duly provided for. The interest rate per annum for the floating rate notes will be reset quarterly on the first day of each floating rate interest period (as defined below) and will be equal to Compounded SOFR plus a margin of 82 basis points. As further described herein, the amount of interest accrued and payable on the notes for each floating rate interest period will be equal to the product of (i) the outstanding principal amount of the floating rate notes multiplied by (ii) the product of (a) the interest rate for the relevant floating rate interest period multiplied by (b) the quotient of the actual number of calendar days in such floating rate interest period divided by 360. The Bank