Sharia banking has an important role in the sharia finance industry in Indonesia. Sharia Bank became the media transaction of Indonesian economic activities. The important role of sharia bank in economic activities, the Bank needs to improve performance efficiently. One measures the performance of Sharia banks by using profitability ratios. Profitability ratios can be measured using Return On Assets (ROA). The purpose of this research is to find out if CAR, FDR, BOPO, Mudharabah revenue, Musyarakah revenue and inflation affect Return On Assets (ROA). This type of research is quantitative using secondary data. The research Data is obtained in the quarterly financial statements period 2012-2018 taken from the official website of Bank Indonesia. Methods of analysis use multiple linear regression, classical assumption test, descriptive analysis and hypothesis testing.
The results showed that the BOPO variable, Mudharabah revenue, Musyarakah revenue and inflation partially significantly affected ROA. CAR and FDR variables partially do not have any effect on ROA. The variable CAR, FDR, BOPO, Mudharabah revenue, Musyarakah revenue and inflation have semultan influence on ROA. The value of ajusted coefficient of determination (R2) amounted to 0.910 which means 91% of ROA variables can be described by the CAR, FDR, BOPO, Mudharabah revenue, Musyarakah and inflation revenues while the remaining 8% are described in other variables.