Filed Pursuant to Rule 433 

Registration Statement No. 333-283007

Free Writing Prospectus

(To the Preliminary Prospectus Supplement dated June 24, 2025 and Prospectus dated November 5, 2024)

June 24, 2025

US$750,000,000 4.354% Notes due July 1, 2030

US$750,000,000 Floating Rate Notes due July 1, 2030

US$750,000,000 4.354% Notes due July 1, 2030

Issuer:	Westpac Banking Corporation
Principal Amount:	US$750,000,000
Ranking:	Senior Unsecured
Expected Ratings:	Aa2 / AA- (Moody’s / S&P Global Ratings)*
Format:	SEC Registered Global Notes
Trade Date:	June 24, 2025
Issue Date:	July 1, 2025 (T+5)
	Since trades in the secondary market generally settle in one business day, purchasers who wish to trade notes on the date hereof or the next three succeeding business days will be required, by virtue of the fact that the notes initially settle in T+5, to specify alternative settlement arrangements to prevent a failed settlement.
Maturity Date:	July 1, 2030
Interest Rate:	4.354%
Price to Public:	100.000%
Benchmark Treasury:	UST 4.000% due May 31, 2030
Benchmark Treasury Price and Yield:	100-20 ¾ / 3.854%
Re-offer Spread to Benchmark Treasury:	plus 50 basis points
Re-offer Yield:	4.354%
Fees:	25 basis points

All-in Price:	99.750%
Interest Payment Dates:	Payable semi-annually in arrears on January 1 and July 1 of each year, commencing January 1, 2026 and ending on the Maturity Date, subject to Business Day Convention.
Day Count Convention:	30/360, unadjusted
Net Proceeds:	US$748,125,000
Business Days:	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.
Business Day Convention:	Any payment of principal, premium and 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
Denominations:	Minimum of US$2,000 with increments of US$1,000 thereafter
CUSIP:	961214 GC1
ISIN:	US961214GC13
Joint Active Bookrunners:	BofA Securities, Inc.
	Citigroup Global Markets Inc.
	J.P. Morgan Securities LLC
	Morgan Stanley & Co. LLC
	Westpac Banking Corporation
Co-Managers:	CIBC World Markets Corp.
	Rabo Securities USA, Inc.
	Scotia Capital (USA) Inc.
Defined Terms:	Capitalized terms not defined in this term sheet have the meaning given in the Preliminary Prospectus Supplement and the Prospectus.

US$750,000,000 Floating Rate Notes due July 1, 2030

Issuer:	Westpac Banking Corporation
Principal Amount:	US$750,000,000
Ranking:	Senior Unsecured
Expected Ratings:	Aa2 / AA- (Moody’s / S&P Global Ratings)*
Format:	SEC Registered Global Notes
Trade Date:	June 24, 2025
Issue Date:	July 1, 2025 (T+5)
	Since trades in the secondary market generally settle in one business day, purchasers who wish to trade notes on the date hereof or the next three succeeding business days will be required, by virtue of the fact that the notes initially settle in T+5, to specify alternative settlement arrangements to prevent a failed settlement.
Maturity Date:	July 1, 2030
Price to Public:	100.000%
Interest Rate:	The interest rate on the Notes for each period will be equal to Compounded SOFR (as defined herein) plus the Margin.
Compounded SOFR:	A compounded average of daily SOFR determined for each quarterly floating rate Interest Period in accordance with the specific formula described under “Description of the Notes—Floating Rate Notes—Secured Overnight Financing Rate” in the Preliminary Prospectus Supplement.
Margin:	plus 82 basis points
Fees:	25 basis points
All-in Price:	99.750%
Interest Periods:	Each quarterly period from, and including, a floating rate Interest Payment Date to, but excluding, the next floating rate Interest Payment Date (or, in the case of the final floating rate Interest Period, the Maturity Date).

Interest Payment Dates:	Payable quarterly in arrears on January 1, April 1, July 1 and October 1 of each year, commencing October 1, 2025 subject to Business Day Convention.
Interest Payment Determination Date:	The date two U.S. Government Securities Business Days before each floating rate Interest Payment Date.
Observation Period:	In respect of each floating rate Interest Period, the period from, and including, the date two U.S. Government Securities Business Days preceding the first date in such floating rate Interest Period to, but excluding, the date two U.S. Government Securities Business Days preceding the floating rate Interest Payment Date for such floating rate Interest Period.
Day Count Convention:	Actual/360
Net Proceeds:	US$748,125,000
Business Days:	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.
Business Day Convention:	If any Interest Payment Date would fall on a day that is not a Business Day, other than the Interest Payment Date that is also the date of maturity for the notes, that Interest Payment Date will be postponed to the following day that is a Business Day, except that if such next Business Day is in a different month then that Interest Payment Date will be the immediately preceding day that is a Business Day.
	If the date of maturity is not a Business Day, payment of principal and interest will be made on the following day that is a Business Day and no interest will accrue for the period from and after such date of maturity.
Denominations:	Minimum of US$2,000 with increments of US$1,000 thereafter
CUSIP:	961214 GD9
ISIN:	US961214GD95
Joint Active Bookrunners:	BofA Securities, Inc.
	Citigroup Global Markets Inc.
	J.P. Morgan Securities LLC
	Morgan Stanley & Co. LLC
	Westpac Banking Corporation

Co-Managers:	CIBC World Markets Corp.
	Rabo Securities USA, Inc.
	Scotia Capital (USA) Inc.
Defined Terms:	Capitalized terms not defined in this term sheet have the meaning given in the Preliminary Prospectus Supplement and the Prospectus.

Free Writing Prospectus

(To the Preliminary Prospectus Supplement dated June 24, 2025 and Prospectus dated November 5, 2024)

*A securities rating is not a recommendation to buy, sell or hold securities and may be subject to revision, withdrawal or suspension at any time.

No PRIIPs / UK PRIIPs KID – No PRIIPs key information document (KID) or UK PRIIPs key information document (KID) has been prepared as not available to retail in EEA or the United Kingdom, respectively.

The Issuer has filed a registration statement (including a prospectus) with the SEC for the offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement and other documents the Issuer has filed with the SEC for more complete information about the Issuer and this offering. You may get these documents for free by visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the Issuer, any underwriter or any dealer participating in the offering will arrange to send you the prospectus if you request it by calling BofA Securities, Inc. toll-free at 1-800-294-1322, Citigroup Global Markets Inc. toll-free at 1-800-831-9146, J.P. Morgan Securities LLC (collect) at 1-212-834-4533, Morgan Stanley & Co. LLC toll-free at 1-866-718-1649 or Westpac Banking Corporation at 1-212-389-1269.