Westpac Banking Corporation

Westpac Banking Corporation is an Australian banking and financial services group and an authorised deposit-taking institution. Its origins trace to the Bank of New South Wales, established in 1817, and it is one of Australia’s major banks, offering consumer, business, institutional, wealth and New Zealand banking services under several brands.^[1][2]

Overview

Westpac Banking Corporation, commonly called Westpac, is a public company and banking group based in New South Wales. The Australian Business Register records its entity name as Westpac Banking Corporation, ABN 33 007 457 141, with Australian Public Company status, active ABN status from 1 November 1999, GST registration from 1 July 2000 and a main business location in NSW 2000.^[3]

In Australia, Westpac operates as an authorised deposit-taking institution, or ADI. The Australian Prudential Regulation Authority lists Westpac Banking Corporation among registered ADIs and states that the listed institutions are regulated by APRA under the Banking Act 1959.^[2] As a bank, Westpac therefore sits within Australia’s prudential framework overseen by APRA, while conduct, markets and disclosure matters may also involve ASIC and listed-company rules associated with the Australian Securities Exchange.

Westpac is generally grouped with Australia’s large domestic banks, alongside Commonwealth Bank of Australia and National Australia Bank. Its ordinary shares have their principal listing on the Australian Securities Exchange under code WBC, and Westpac ordinary shares are also listed on the New Zealand Exchange.^[4] Westpac’s American Depositary Shares were delisted from the New York Stock Exchange on 31 January 2022, and the former ticker WBK is no longer available for NYSE trading.^[4]

Historical development

Westpac describes itself as Australia’s first bank and oldest company, tracing its lineage to the Bank of New South Wales.^[1] The Bank of New South Wales was established in 1817 under a charter of incorporation signed by Governor Lachlan Macquarie.^[1] Westpac’s own history notes that the bank emerged from colonial Sydney efforts to provide banking services and issue currency, and that its early role was connected with financial infrastructure for the developing colony.^[1]

The modern Westpac name dates from the early 1980s. In October 1982, the Bank of New South Wales merged with the Commercial Bank of Australia and took the name Westpac Banking Corporation.^[1] The name “Westpac” was adopted as a contraction of “Western Pacific,” reflecting the geographic scope implied by the merged institution’s strategic ambitions.^[1]

A later major corporate event was the merger with St.George Bank in 2008. Westpac’s historical summary states that Westpac and St.George Bank merged after St.George shareholders voted in favour of the transaction, and that the merger brought the St.George and BankSA brands into the group; Westpac had also acquired RAMS in 2007, contributing to a broader multi-brand structure.^[1] Westpac’s investor materials separately note that the Federal Court of Australia approved the St.George-Westpac merger on 17 November 2008.^[5]

Business lines and brands

Westpac Group operates through a portfolio of brands that includes Westpac, St.George, BankSA, Bank of Melbourne and BT. The group’s own business overview states that this brand portfolio supports and serves more than 12.7 million customers.^[6] The multi-brand structure is important in Australian retail banking because St.George, BankSA and Bank of Melbourne retain distinct customer-facing identities even though they form part of the Westpac group.

Westpac’s 2025 annual report describes key operating segments: Consumer; Business & Wealth; Institutional; New Zealand; and Group Businesses.^[7] The Consumer segment provides banking products and services in Australia across mortgages, consumer finance, and cash and transactional banking.^[7] These activities place Westpac in major household banking markets, particularly home lending and deposits, where Australian banks are materially affected by the Australian cash rate and broader monetary policy conditions set by the Reserve Bank of Australia.

The Business & Wealth segment includes business banking for customers generally up to $200 million in exposure, wealth management, private wealth and Westpac Pacific.^[7] The Institutional segment provides services for larger corporate, institutional and government customers; Westpac’s business overview describes Westpac Institutional Bank as delivering a broad range of financial services to commercial, corporate, institutional and government customers operating in, and with connections to, Australia and New Zealand.^[6]

Westpac’s New Zealand business is a significant part of the group’s trans-Tasman profile. In the 2025 segment table, Westpac reported New Zealand net profit attributable to owners of WBC of A$1.087 billion, compared with A$2.282 billion for Consumer, A$2.186 billion for Business & Wealth and A$1.575 billion for Institutional.^[7] Westpac’s annual report also discusses New Zealand regulatory settings, including Reserve Bank of New Zealand proposals affecting overseas bank branches, indicating that New Zealand prudential rules are relevant to parts of the group’s structure.^[7]

Financial profile

Westpac’s financial statements are prepared for a 30 September financial year. For the year ended 30 September 2025, Westpac reported consolidated net interest income of A$19.380 billion, total non-interest income of A$3.004 billion and net operating income of A$22.384 billion.^[7] In the same year, the group reported operating expenses of A$11.916 billion, impairment charges of A$424 million, profit after income tax expense of A$6.933 billion and net profit attributable to owners of Westpac Banking Corporation of A$6.916 billion.^[7]

Westpac’s balance sheet is dominated by lending, deposits, wholesale funding and financial-market assets and liabilities. In its 2025 annual report extract, the parent entity reported total assets of A$1.065 trillion and deposits and other borrowings of A$696.660 billion at 30 September 2025.^[7] In Westpac’s 2025 segment reporting, group loans were A$851.853 billion and deposits and other borrowings were A$770.457 billion across the segment presentation, which includes Consumer, Business & Wealth, Institutional, New Zealand and Group Businesses.^[7]

At the segment level, Consumer was the largest lending segment in 2025, with loans of A$525.447 billion and deposits and other borrowings of A$366.299 billion.^[7] Business & Wealth reported loans of A$115.203 billion and deposits and other borrowings of A$152.312 billion; Institutional reported loans of A$117.704 billion and deposits and other borrowings of A$131.379 billion; and New Zealand reported loans of A$93.443 billion and deposits and other borrowings of A$72.806 billion.^[7]

Westpac’s profitability is significantly linked to net interest income, which reflects the spread between interest-earning assets such as loans and interest-bearing liabilities such as deposits and wholesale borrowings. This makes Westpac sensitive to changes in the domestic and global interest-rate environment, funding markets, competition for deposits and loan demand. These are common characteristics of large Australian banks and are not unique to Westpac.

Prudential regulation and capital

As an ADI, Westpac is subject to APRA prudential standards, including requirements for capital adequacy, liquidity, risk management and governance. APRA’s ADI register confirms that Westpac is included among institutions regulated under the Banking Act 1959.^[2] APRA’s licensing guidance states that a business intending to conduct banking business in Australia needs an ADI licence from APRA giving authority to conduct banking business.^[8]

Westpac’s annual report describes APRA regulatory capital concepts including Common Equity Tier 1 capital, Tier 1 capital, Total Capital and the leverage ratio.^[7] It states that, under APRA prudential standards, Australian ADIs including Westpac are required to maintain minimum capital requirements: a CET1 capital ratio of at least 4.5%, a Tier 1 capital ratio of at least 6.0% and a Total Capital ratio of at least 8.0%.^[7]

In October 2025, APRA announced a decision related to Westpac’s operational risk capital overlay. Westpac’s 2025 annual report states that APRA decided on 15 October 2025 to lift the court-enforceable undertaking and remove Westpac’s remaining A$500 million operational risk capital overlay, increasing Westpac’s CET1 ratio by approximately 17 basis points through a reduction in risk-weighted assets of A$6.250 billion.^[7] This was a regulatory development after the end of Westpac’s 2025 financial year.

Market listing and shareholders

Westpac ordinary shares trade on the ASX under code WBC. The company states that the ASX is the principal listing for its ordinary shares and that ordinary shares are also listed on the New Zealand Stock Exchange.^[4] Westpac’s ASX listing links it to Australia’s public equity market and to equity indices that include major Australian listed companies, such as the S&P/ASX 200 Index and the All Ordinaries Index, subject to index-provider rules and periodic rebalancing.

Westpac’s shareholder materials include annual reports, full-year results presentations, investor discussion packs, climate reporting, corporate governance statements and Pillar 3 disclosures. Westpac’s 2025 annual reporting suite included its annual report, presentation and investor discussion pack, climate report, corporate governance statement, Pillar 3 report, notice of meeting and sustainability index and datasheet.^[9] Pillar 3 reporting is relevant for bank investors and analysts because it provides additional information about capital, risk-weighted assets and prudential exposures.

Compliance and enforcement history

Westpac has been subject to major enforcement action in Australia. On 21 October 2020, AUSTRAC announced that the Federal Court of Australia had ordered Westpac to pay a A$1.3 billion penalty for breaches of the Anti-Money Laundering and Counter-Terrorism Financing Act 2006.^[10] AUSTRAC described the penalty as the highest civil penalty in Australian history at the time, reflecting the seriousness of Westpac’s compliance failings.^[10]

AUSTRAC’s enforcement-actions record states that on 24 September 2020 AUSTRAC and Westpac jointly filed an agreed statement of facts in the Federal Court, including a proposed civil penalty of A$1.3 billion, and that on 21 October 2020 the court declared that Westpac had breached the AML/CTF Act on more than 19 million occasions and ordered the penalty.^[11] The matter is a notable example of regulatory and compliance risk at a large financial institution.

The 2020 AUSTRAC penalty was not a statement about the solvency of the bank; it related to compliance with financial-crime reporting and control obligations. In financial encyclopedia context, it is relevant because enforcement actions can affect capital planning, remediation costs, governance scrutiny, reputation and the regulatory relationship between a bank and public authorities.

Role in the Australian financial system

Westpac’s scale, ADI status and long operating history make it one of the major institutions in Australian banking. It performs core financial-intermediation functions: receiving deposits, extending credit to households and businesses, providing transaction accounts, supporting payments, offering institutional banking services and maintaining access to funding markets. Its retail banking operations connect it directly to household savings, housing credit and small-business finance.

Westpac is also part of Australia’s broader payments and financial-market infrastructure through its transaction banking, card, merchant, institutional and treasury activities. The group interacts with regulators, exchanges, clearing systems, central-bank liquidity facilities and prudential reporting frameworks. As with other large ADIs, Westpac’s balance sheet and funding structure are relevant to financial-stability analysis by Australian authorities including APRA, the Reserve Bank of Australia and the Council of Financial Regulators.

See also

Related Australian finance entries include Reserve Bank of Australia, Australian Prudential Regulation Authority, Australian Securities and Investments Commission, Australian Securities Exchange, Commonwealth Bank of Australia, National Australia Bank, Australian dollar, Australian cash rate, and Superannuation.