Australian banks breached the industry's code of conduct 7,973 times between March 2025 and June 2025, with the "big four" banks, Commonwealth Bank of Australia (ASX:CBA), ANZ Group Holdings (ASX:ANZ, NZE:ANZ), National Australia Bank (ASX:NAB), and Westpac Banking (ASX:WBC, NZE:WBC), accounting for 83%, or 6,598, of the breaches, the Banking Code Compliance Committee said in a report.

The financial impact to customers as a result came in at AU$19.8 million, while the impact to banks came in at AU$16.9 million. Around 5.9 million customers were impacted.

The lenders detected 91% of breaches, or 7,240 of 7,973, internally through the three lines of defence or by staff outside of formal monitoring.