회계이익과 과세소득 차이, 일시적 차이가 KIS 신용평점에 미치는 영향

This study analyzes the differences between book income and taxable income as well as its temporary differences, and relations between KIS credit scores of corporate listed in the Korea Stock Exchange from 2001 to 2005. According to the findings, first, the difference between book income and taxable income gave a significant positive(+) effect on KIS credit scores, which supports the study of hypothesis 1. This means that the bigger differences between accounting earnings and taxable income; the lower continual earnings become, which is the negative information, thus corporate KIS credit scores are highly given. Second, the temporary differences between accounting earnings and taxable income gave a significant positive impact on KIS credit scores. This means that if the managers earning is not permanent there is a decrease on its continual earnings of next fiscal year due to the reversal, hence, corporate KIS credit scores are highly given. As the study limits, its collected taxable income data of sample companies from the auditors’ report notes but failed to confirm the consistency with actual taxable income data. Moreover, it is difficult to generalize the hypothesis of the study with the credit score data of the specific company. Through credit scores of the specific company as well as credit-rating agencies’ credit scores by improving the study limits, the follow-up study needs to conduct the comparison analysis between accounting earnings and taxable income.