Following the enactment of the Commonwealth Bank Act in late 1911, the practical task of establishing the institution commenced with earnest. A crucial first step was the appointment of its inaugural Governor, Sir Denison Miller. Miller, a highly respected and experienced figure, had previously held the position of General Manager of the Bank of New South Wales, one of Australia’s leading private trading banks. His appointment was strategic, intended to bridge the gap between the bank's public mandate and the commercial realities of the financial industry. Miller brought invaluable private sector acumen to a public enterprise, a critical factor in navigating the complex process of building a new banking infrastructure from the ground up. Operating initially from temporary offices in Melbourne with a lean team, his expertise was instrumental in recruiting initial staff, establishing robust operational procedures, and designing systems that would ensure the bank could operate effectively while fulfilling its government-backed objectives. The initial capitalisation for the bank was modest, with a government grant of £10,000, but a significant foundational asset was the strategic transfer of the Post Office Savings Bank deposits from state control, which provided an immediate and substantial deposit base exceeding £2.3 million.
On 15 July 1912, the Commonwealth Bank of Australia officially opened its doors for business in Melbourne at 379 Collins Street, with branches in other state capitals, including Sydney, following rapidly. Initially, the bank focused primarily on its savings bank function, a strategic decision designed to appeal directly to the general public and accumulate a stable deposit base. This approach allowed the bank to quickly build trust and demonstrate its reliability, emphasizing its explicit federal government guarantee as a key differentiator in a competitive market that included state-run savings banks and the savings departments of private trading institutions. The accessibility of its savings accounts, often featuring lower minimum deposits and competitive interest rates (typically 3% on deposits up to £300), was specifically designed to attract ordinary Australians, including wage earners, rural communities, and new immigrants, who might have been underserved by existing private institutions. This focus on the "people's bank" aspect was central to its early public relations strategy.
Early operations were focused on establishing a robust, national presence across Australia's vast geography. The bank quickly expanded its network, notably by forging a crucial partnership with Australia Post. This arrangement allowed the Commonwealth Bank to operate agencies within post offices across the country. This partnership was a critical enabler, providing the Commonwealth Bank with an unparalleled reach, particularly into regional and remote communities where private banks often had limited physical presence or found it uneconomical to establish full branches. By 1913, the bank had approximately 600 agencies, a number that rapidly grew to over 2,000 by 1914. This extensive network was vital for fulfilling the bank’s mandate of serving the entire nation and facilitating economic development in areas that traditionally lacked access to formal financial services. By leveraging existing government infrastructure, the bank was able to scale its operations rapidly and efficiently, reaching a broad customer base in a relatively short period, despite the logistical challenges of manual ledger systems and dispersed communication channels.
The onset of World War I in 1914 profoundly shaped the Commonwealth Bank's early trajectory and significantly accelerated its development. The bank quickly assumed a pivotal role in war finance, acting as the Commonwealth Government's primary agent for raising funds through war loans and managing the country's wartime finances. This responsibility extended to issuing Australian Treasury Notes, which effectively functioned as the nation's currency and provided a mechanism for controlling the money supply. Between 1915 and 1919, the Commonwealth Bank managed the issuance of nine major war loans, successfully raising over £250 million from the public, a monumental sum for Australia at the time. This function, initially unforeseen in its commercial capacity, demonstrated the bank's capacity to serve as a de facto central bank, providing critical financial stability and fiscal management during a period of unprecedented national expenditure and economic uncertainty. Its involvement in war finance cemented its position as a vital national institution, distinguishing its role significantly from that of private commercial banks.
Concurrent with its wartime contributions, the Commonwealth Bank gradually expanded its commercial banking activities. This expansion was critical for diversifying its revenue streams and competing more directly with the established private trading banks, often referred to as the "Big Four" (Bank of New South Wales, Commercial Banking Company of Sydney, National Bank of Australasia, and Union Bank of Australia). The bank began offering a broader range of services, including current accounts, overdraft facilities for businesses, trade finance, and foreign exchange facilities. This move was essential for attracting corporate clients and larger businesses, transforming it from a mere savings institution into a comprehensive commercial bank. Wartime needs further spurred this expansion, as government contracts and industries supporting the war effort required sophisticated commercial banking services. The expansion into commercial banking marked a significant evolution, signalling its intent to become a full-service financial provider rather than solely a public savings repository.
Throughout its foundational years, the bank also began to build a distinct company culture, characterized by its public service ethos and national mission. Employees, numbering over 1,000 by 1920, many of whom were recruited from other government departments or the private sector, were instilled with a strong sense of responsibility towards the Australian public. The bank's commitment to accessibility, stability, and its unique government guarantee helped to foster a widespread perception of it as a trustworthy and reliable institution, earning it the moniker "the people's bank." Early advertising efforts consistently highlighted its security and national reach, reinforcing this image. This foundational period saw the bank establish not only its physical presence across the continent but also its reputation as an integral part of Australia's economic fabric, a reputation that would serve as a strong base for future growth and influence.
By the end of its first decade, the Commonwealth Bank had achieved significant milestones. It had successfully launched its operations, established a nationwide network of branches and post office agencies, and amassed a substantial deposit base, exceeding £100 million by 1920. It had also demonstrated its critical importance during a national crisis, the First World War. Its initial product-market fit was clearly validated through its widespread adoption, particularly in the savings sector, and its growing commercial activities, which were further formalised by amendments to the Commonwealth Bank Act in 1920 that expanded its central banking powers. The bank had transitioned from a legislative concept to a tangible, operational entity, firmly embedded in the Australian financial system at an unprecedented speed compared to its private sector counterparts. This solid footing, established during a period of national and global upheaval, positioned the Commonwealth Bank as a significant market player, ready to further expand its influence and capabilities in the subsequent decades, setting the stage for its emergence as a powerful national institution.