핵심감사제 도입의 차별적인 효과: 감사보수와 감사인 규모를 중심으로

[Purpose]According to the Key Audit Matters(KAM), the auditor selects the key audit items in communication with the company and is required to describe the reason for the selection and results performed in the audit report. This study verifies the effectiveness of the KAM. [Methodology]In order to verify the effect of the KAM by period and industry, this study used discretionary accruals(DA). In addition, we verified whether the effectiveness of the KAM is differentiated according to the size of auditor and the audit fee. The entire sample is from 2013 to 2019, and the order industries are companies belonging to the ship and construction industries. [Findings]DA of the ship and construction industries decrease after the KAM, and DA of the ship and construction industries are lower than that of the non－ship and construction industries. Furthermore, improvement of audit quality is greater in non－large accounting firms. Unlike large accounting firms that have already conducted strict audits on matters with high audit risk, non－large accounting firms conduct systematic audits only with the adoption of the KAM. Finally, in the samples where the audit fee is higher, the audit quality is improved by the KAM, which suggests that sufficient audit fees should be paid to auditors for the successful establishment of the KAM. [Policy Implications]The effect of the KAM can be differentiated depending on the size of the auditor the audit fee. Regulatory authorities should consider the size of auditor and the size of audit fee in revising and supplementing the details of the KAM.