This study aims to determine the effect of Operating Costs, Operating Income, and Net Interest Margin on Return on Assets at PT Bank Danamon Tbk for the 2014-2024 period. The method used is a quantitative method. The sample used in this study is the financial statements of PT Bank Danamon Tbk for the 2014-2024 period. Data analysis used is a classical assumption test, regression analysis, Coefficient of Determination that the Coefficient of Determination (R Square) is 0.754 or 75.4% and hypothesis testing. The results of this study are in the hypothesis test stating that BOPO has no effect on Return on Assets with a t count of 1.788 0.05. While on the Net Interest Margin variable, the hypothesis test shows that there is an influence on the Return on Assets variable with a t count of 2.452> t table 2.306. and the sig value is 0.040, and the simultaneous test results state that BOPO and NIM have a significant effect on ROA with the results of F count > F table, where the amount is (12.238 > 4.46) and the sig value is 0.004 < 0.05.
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