Oversight of the External Auditor
Beyond strong, robust independence rules, there is oversight of the external auditor by the audit committee and the PCAOB. The Sarbanes-Oxley Act stipulates that the audit committee, not the Chief Executive Officer or Chief Financial Officer, has responsibility for the appointment, compensation, retention, and oversight of the company’s independent external auditor and must preapprove all non-audit and audit services provided. Placing responsibility to oversee, and compensate, the external auditor in the hands of the audit committee is a feature of the U.S. system designed to protect the independent work of auditors.
The audit committee is responsible for negotiating the level of fees (i.e., compensation) paid to the independent auditor. The PCAOB inspects audit firms, including overseeing compliance with independence regulations.
Within an audit firm, there are incentives for the audit engagement team to deliver a high-quality audit. Performance evaluations are driven by audit quality events – both positive and negative. This is a strong incentive for audit staff and partners. There are layers of review such that the engagement partner does not work in a silo. The Engagement Quality Reviewer is a second partner review and firms have specific required consultation protocols which necessitate national officer review of certain complex audit matters.