Below are the long-term credit ratings of Australian banks. The four major banks ANZ, Commonwealth, NAB and Westpac are among the strongest and best in the world from a credit standpoint. The five banks have a long-term credit rating of AA- from Standard & Poor's and six banks have long-term debt rating of Aa3 from Moody’s. Ratings may be revised or withdrawn at any time by the rating agencies.

No Bank Moody's Standard & Poor's Fitch Ratings
1 ANZ Banking Group Aa3 AA- AA-
2 Commonwealth Bank of Australia Aa3 AA- AA-
3 National Australia Bank Aa3 AA- AA-
4 Westpac Banking Corporation Aa3 AA- AA-
5 Rabobank Australia Ltd Aa3 - -
6 Bankwest (1) Aa3 AA- AA-
7 HSBC Bank Australia Limited A1 A+ n/r
8 Suncorp Bank A1 A+ A+
9 AMP Bank Ltd A2 A -
10 Macquarie Bank Limited (MBL) A2 A A
11 Bendigo and Adelaide Bank A3 BBB+ A-
12 ING Bank (Australia) Ltd n/a n/a n/a
13 Bank of Queensland Limited A3 BBB+ A-
14 Citigroup Pty Limited A3 - -
15 Members Equity Bank Pty Ltd (ME Bank) Baa1 BBB -
16 Arab Bank Australia Limited (ABAL) - BB+ BBB-
22 Bank Australia Baa1 BBB  
17 Auswide Bank Baa2 BBB- BBB+
18 Defence Bank  - BBB  -
19 G&C Mutual Bank Baa1 BBB- -
20 Greater Bank  - BBB -
24 Heritage Bank Baa1  - BBB+
21 IMB Bank Baa1 BBB BBB+
23 MyState Bank Ltd Baa1 BBB  -
25 Police Bank   BBB BBB+
26 Qudos Mutual (trading as Qudos Bank)   BBB-  
27 QPCU Ltd (trading as QBANK)   BBB-  
28 Rural Bank (2)   BBB+  
29 Teachers Mutual Bank Baa1 BBB  

Credit Ratings as of March 2019.
1 - Bankwest (formerly The Bank of Western Australia) has credit ratings through its parent company the Commonwealth Bank of Australia.
2 - Rural Bank is a wholly-owned subsidiary of Bendigo and Adelaide Bank.

Standard & Poor's (S&P)
Standard & Poor's, with offices in 24 countries and a history that dates back more than 150 years, is a global leader in objective risk analyses and evaluations of the credit worthiness of issuers worldwide.

Fitch Ratings
Fitch Ratings, founded in December 1913 by John Knowles Fitch, is an international rating agency that provides global capital market investors with ratings and research.

Moody's Investor Services
Moody's maintains a presence in 28 countries and is one of the world's most widely utilized sources for credit ratings, research and risk analysis. The company was established in 1909.