This study aims to examine and analyze the effect of information asymmetry, voluntary disclosure, earnings management and firm size on the cost of equity capital. The sample selection in this research was done by purposive sampling. Based on the criteria obtained as many as 125 of the 43 population manufacturing companies that became the sample. The data analysis techniques used in this research are descriptive statistical test, normality test, multicollinearity test, heteroscedasticity test, autocorrelation test, multiple regression analysis, F statistic test and hypothesis testing. The results of the analysis show that partially information asymmetry does not have a significant positive effect on the cost of equity capital, meanwhile voluntary disclosure has a significant positive effect on the cost of equity capital, then earnings management does not have a significant positive effect on the cost of equity capital and partially company size has a negative effect. significant to the cost of equity capital.