표준감사시간 산출모형의 적정성 검토: 실제감사시간과의 비교 및 모형 검증을 중심으로

초록

The Standard Audit Hours (SAH) regulation was introduced in Korea in 2019 to enhance audit quality and protect stakeholders by specifying the minimum hours required for auditors to comply with auditing standards. Despite its intended role, concerns have emerged regarding the complexity of the model and the rationality of adjustment factors. This study analyzes the implementation of the SAH system and assesses the appropriateness of the current model. The research proceeds in two directions. First, firm-level SAH was estimated under current rules and compared with actual audit hours across listing status, industry, and auditor appointment type. Results show that actual audit hours generally exceed SAH for listed firms but fall short for unlisted firms, with differences varying by auditor experience. Industry- and appointment-type comparisons also revealed significant discrepancies, indicating that the SAH model only partially reflects audit practice. Second, actual audit hours were used to recalculate SAH by group, size, and industry, and compared with the current SAH table. Findings indicate that larger and listed firms require more audit hours than prescribed, and industry-specific differences highlight the need for revisions. Analysis of adjustment factors further suggests that while most remain within regulatory bounds, some exceed limits or lack statistical significance, calling for refinement. These findings are robust across stepwise analyses using recent samples and varied model specifications. This study provides empirical evidence on the discrepancies between actual and standard audit hours, identifies structural issues in the SAH model, and offers practical implications for improving the system and guiding future revisions.

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