IMB Bank (formerly Illawarra Mutual Building Society), founded in 1880,  is the mutual financial institutions with more than 180,000 members and branches in Illawarra, Sydney, Melbourne, NSW South Coast and the Australian Capital Territory (ACT). With 550 employees, IMB provides a full suite of banking products and services including transaction and savings accounts, personal and car loans, home loans, credit and debit cards, term deposits, online banking as well as business loans, business accounts, merchant services, payroll facility, asset finance and debtor finance. It also offers treasury services for local governments, state statutory bodies, commonwealth government agencies, private and public corporations, institutions, clubs and not-for-profit organizations. Its insurance products include home and contents insurance, motor vehicle insurance, credit protection insurance, travel insurance, landlords insurance and caravan insurance.

As of June 2016, it had $5.2 billion in total assets, $3.9 billion in loans and $4.3 billion in deposits. In 2016, IMB Bank merged with Sutherland Credit Union.

Head office address:
253-259 Crown Street
Wollongong NSW 2500
Phone number: 133 462
BSB: 641 800
ABN: 92 087 651 974