실제감사시간과 표준감사시간의 차이가 조세회피에 미치는 영향

According to the External Audit Act revised in 2017, Korean Institute of Certified Public Accountants(KICPA) has implemented the standard audit hours(“SAH”) system as of 2019. This study aims to verify if the system helped reduce tax avoidance of companies. The samples were taken from 5,352 of yearly data of stock-listed companies on Korea Exchange from 2015 to 2019. The results of the empirical analysis are as follows. First, it was found that the corporations that meet the SAH were lower in tax avoidance than the others, and also that the better the corporations met the SAH, the less they avoided taxation. From the results using abnormal audit hours, it was found that the effect of the corporations with the abnormal audit hours being positive on tax avoidance was not different from those without. The results show that the implementation of the SAH system can lead to reduce tax avoidance, and that the normal audit hours estimated using the actual audit hours are limited as criteria for appropriate audit hours. Second, it was found that the corporations that got audited by Big4 auditors with meeting the SAH were lower in tax avoidance than those that didn’t. Third, it was found that the corporations that listed on the KOSDAQ with meeting the SAH were lower in tax avoidance than those that didn’t. Meanwhile, when comparing the results using the SAH with those using the abnormal audit hours, consistent results were found from the SAH and inconsistent from the abnormal hours.