The underpayments were caused by errors in the banks’ systems, including those relating to its payroll and other human resources systems.
On Friday, CBA said it would also start making a further $14.9 million in repayments next week, and it expected a further $25 million, plus interest, to be repaid to current and former by the end of June next year.
“It is unacceptable that some of our people were not paid the correct entitlements. This should never have happened and I apologise to anyone impacted by these past errors,” chief executive Matt Comyn said.
“Our priority is to complete the payments with interest and, where applicable, superannuation.”
The cost of CBA’s underpayment has increased as the bank has widened its investigation into the issue, including a review of past entitlements including wages, leave balances, overtime and superannuation.
As part of the investigation, the bank has examined the records of 250,000 current and former staff, going back to 2010, and in some cases, as far as 2002. The review included looking through 10 million payslips of a range of staff, including frontline workers and people its in head office.
The average reimbursement is about $220 per employee per year for which they were underpaid.
CBA said it had self-reported its review to the Fair Work Ombudsman and the watchdog was conducting its own investigation into the matter.