Filed under Rule 424(b)(2), Registration Statement No. 333-172579

Preliminary Pricing Supplement No. 17 - Dated Monday, November 28, 2011 (To: Prospectus Dated November 16, 2011)

CUSIP

Principal

Gross

Net

Coupon

Coupon

Coupon

Day Count

Maturity

1st Coupon

1st Coupon

Survivor's

FDIC

Product

Number

Amount

Selling Price

Concession

Proceeds

Type

Rate

Frequency

Basis

Date

Date

Amount

Option

Guaranteed

Ranking

96121BAS6

$

100.000%

1.250%

$

Fixed

2.500%

Monthly

30/360

12/15/2016

01/15/2012

$2.57

Yes

No

Senior Unsecured Notes

Redemption Information: Non-Callable

Trade Date: Monday, December 5, 2011 @ 12:00 PM ET

Westpac Banking Corporation

Settle Date: Thursday, December 8, 2011

Prospectus dated November 16, 2011

Minimum Denomination/Increments:$1,000.00/$1,000.00

Initial trades settle flat and clear SDFS: DTC Book Entry only

Westpac Banking Corporation

Joint Lead Managers and Lead Agents: BofA Merrill Lynch, Incapital LLC Agents: Citigroup, Deutsche Bank Securities,
Goldman, Sachs & Co., HSBC, J.P. Morgan, BofA Merrill Lynch, Morgan Stanley, UBS Investment Bank, Wells Fargo Advisors

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