The strongest bank in Australia, by most metrics like market capitalization, total assets, and home lending, is the Commonwealth Bank (CBA), consistently leading the "Big Four" (CBA, Westpac, NAB, ANZ) in size and scale as of late 2025/early 2026 data. While other banks like Westpac and NAB are close competitors, CBA holds the top position across key indicators for the Australian financial landscape.
1. Commonwealth Bank of Australia. Commonwealth Bank dominates the Australian banking landscape as the nation's largest financial institution by every major measure including assets, market capitalisation, deposits and customer numbers.
CommBank, ANZ, NAB and Westpac all now rank among the 25 safest banks in the world. As you can see, the big four have identical scores, all very strong indicating a very low credit risk.
While Bendigo Bank consistently held the title for years, recent 2025 data from Roy Morgan shows the Commonwealth Bank (CBA) has taken over as Australia's most trusted bank, recognized for digital security and customer service, though customer-owned banks (like Bendigo) are noted for strong sector-wide trust.
Best National Banks
Australia's Best Major Bank: Commonwealth Bank
“If you prefer the national branch network of a major bank, CommBank is once again the standout of the big four” explains Marshall.
If you are an Australian tax resident and you have an account in a financial institution overseas, we will receive your information from the tax authority of that jurisdiction. All information reported under these laws is handled in the strictest confidence by the ATO and foreign tax authorities.
New financial data from Roy Morgan's Wealth Report shows that among the larger banks, Macquarie has the wealthiest customers. Macquarie customer net wealth per capita is a market leading $943,000 in March 2024.
The banks of greatest concern are Flagstar Bank and Zion Bancorporation, according to the screener. Flagstar Bank reported $113 billion in assets with a total CRE of $51 billion. The bank, however, only had $9.3 billion in total equity, making its total CRE exposure 553% of its total equity.
SoFi® (Member FDIC) is a top choice for online banking security, thanks to its robust fraud protection, two-factor authentication, and FDIC insurance covering deposits up to $3 million ⁴.
Commonwealth Bank of Australia (CBA)
It is the largest of the banks in Australia and offers a diversified range of financial products and services. It currently provides retail, business, institutional banking, and wealth management products and services to its 16.6 million customers.
5 Australian bank accounts with no monthly fees
A United States person that has a financial interest in or signature authority over foreign financial accounts must file an FBAR if the aggregate value of the foreign financial accounts exceeds $10,000 at any time during the calendar year. The full line item instructions are located at FBAR Line Item Instructions.
Australian banks and other institutions provide your information to the ATO because they legally have to. The ATO has even extended its reach to overseas institutions as well. Our finances are definitely not private anymore!
If you transfer over A$10,000 in Australia, financial institutions must report it to AUSTRAC (Australian Transaction Reports and Analysis Centre) as a Threshold Transaction Report (TTR) for anti-money laundering, requiring you to provide personal details and ID. For physical cash movements across borders, you must declare it to customs, or face penalties. For electronic transfers, banks automatically report them, but you may be asked for more info, and non-compliance could see the transaction blocked.
Here, we'll take a quick look at the top three banks from the study and what they offer.
While Bendigo Bank consistently held the title for years, recent 2025 data from Roy Morgan shows the Commonwealth Bank (CBA) has taken over as Australia's most trusted bank, recognized for digital security and customer service, though customer-owned banks (like Bendigo) are noted for strong sector-wide trust.
In terms of absolute size based on tier one capital, ANZ remains the largest Australian lender, followed by Commonwealth Bank and National Australia Bank. Based on improvement across a number of indicators, however, Westpac comes out on top of The Banker's performance table.
9 of The Best Banks For High Net Worth Individuals
Capital One ranks highest in overall satisfaction for a sixth consecutive year, with a score of 702. U.S. Bank (679) ranks second and Chase (677) ranks third.