The development of accounting conservatism has progressed, though with various pros and cons. Therefore, this study aimed to examine the relationship between managerial ability, convergent interest, and accounting conservatism for manufacturing companies on the Indonesia Stock Exchange from 2018 to 2019. The internal quality control was used as a mediating variable of the relationship between managerial ability and convergent interest in accounting conservatism. The results showed that managerial ability and convergent interest affect internal quality control and accounting conservatism, which benefit the company and stakeholders. The Sobel test identified internal quality control as mediating variable of the relationship between managerial ability and convergent interest with accounting conservatism. This study contributed to the accounting conservatism literature and its additional determinants. This study contributes in several different ways. First, to the knowledge, this is the first study to examine a comprehensive model between managerial ability, convergent interest, internal control quality, and accounting conservatism. Second, this study contributes to the literature on accounting conservatism and produces additional determinants of accounting conservatism.