Its report said suspicious funds from countries including Mexico, Iran and Syria had passed through the bank.
The committee is hearing from HSBC officials, one of whom said he found it “painful and embarrassing” to talk about the bank’s shortcomings.
HSBC’s head of group compliance, David Bagley, stepped down at the hearing.
Mr Bagley told the committee that the bank had “fallen short of our own and regulators’ expectations but that a major overhaul of the bank’s compliance activities was underway and that HSBC had “learned a lot of valuable lessons”.
He said despite being head of compliance he had not had full authority to act over all parts of the bank.