Company: WEBNF
Filing Date: 2025-06-26
Form Type: 424B5
Source: 0001104659-25-062718
Chunk: 27

Company: WESTPAC BANKING CORP
Filing Date: 2025-06-26
Form: 424B5
Chunk 27
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### USE OF PROCEEDS
We estimate that the net proceeds from the offering of the notes, after taking into account the underwriting discount and deducting estimated offering expenses payable by us, will be US$1,495,697,850. We intend to use the net proceeds for general corporate purposes.

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TABLE OF CONTENTS

CAPITALIZATION We set forth below our cash and balances with central banks and our capitalization as of March 31, 2025 and as adjusted to give effect to the issuance of the notes and the repayment of maturing debt issues and the issuance of new debt issues subsequent to March 31, 2025 and on or before May 31, 2025. This information should be read in conjunction with our consolidated financial statements, including the notes thereto, and other financial information pertaining to us incorporated herein by reference.

| ​                                                        | ​ | ​ | As ofMarch 31, 2025 |   |         |   |   |   |             |   |            |   | ​ |
|:---------------------------------------------------------|:--|:--|:--------------------|:--|--------:|:--|:--|:--|:------------|:--|-----------:|:--|:--|
| ​                                                        | ​ | ​ | Actual              |   |         |   | ​ | ​ | As adjusted |   |            |   | ​ |
| ​                                                        | ​ | ​ | ​                   | ​ |       ​ | ​ | ​ | ​ | -unaudited  |   |            |   | ​ |
| ​                                                        | ​ | ​ | -in A$ millions     |   |         |   |   |   |             |   |            |   | ​ |
| Cash and balances with central banks                     | ​ | ​ | ​                   | ​ |  58,352 | ​ | ​ | ​ | ​           | ​ |     58,352 | ​ | ​ |
| Debt issues                                              | ​ | ​ | ​                   | ​ | 171,864 | ​ | ​ | ​ | ​           | ​ | 170,175(1) | ​ | ​ |
| Notes offered hereby                                     | ​ | ​ | ​                   | ​ |       — | ​ | ​ | ​ | ​           | ​ |   2,331(2) | ​ | ​ |
| Loan capital                                             | ​ | ​ | ​                   | ​ |