Australian Unity Bank is a customer-owned bank part of the Australian Unity mutual company (until the business is merged into Bank Australia).

The bank was formed in 2012 after Big Sky Credit Union merged with Australian Unity to become the latter's banking division.

Australian Unity Bank represents a small fraction of the total business. As a whole, Australian Unity is dubbed a "wellbeing company", with forays into private health and general insurance, wealth management, and home health services, among others.

It has just over $1.3 billion in residents' assets on its books, less than $1 billion in owner-occupied home loans, $300 million in investment loans, and about $1.2 billion in household deposits. Despite its small size, Australian Unity Bank offers a suite of financial products, including home loans, personal loans, savings accounts, term deposits, and credit cards.

In late 2025, however, approximately 25,000 customers of the bank will be transferred to Bank Australia following the decision of Australian Unity to offload its $1.6-billion banking business in a bid to concentrate on its core health and wealth services arms.

The planned transfer is also aimed at ensuring the mutual company's banking division will remain competitive, particularly in the digital space, to keep pace with its peers and provide a "positive banking experience" to its customers.

Australian Unity reviews from its customer base highlight low fees and ease of online payments as some of the strengths of the bank. However, limited banking options and app functionality have been noted. As with any product or service, experiences vary.