PT. Bank SUMUT should be able to maintain its existence and develop inthe ever-increasing competitive competition with the other banks. Implementation of intellectual capital can be used as the strategic decisions to be prioritized. One of them is by improving managerial performance to create more value than the competitors. The objective of the research is to find out and to analyze the influence of intellectual capital which consists of customer capital, human capital, and structural capital simultaneously on the managerial performance of PT. Bank SUMUT, the influence of the variables of customer capital, human capital, and structural capital partially on the managerial performance of PT. Bank SUMUT, and to find out the intellectual capital which consists of customer capital, human capital, and structural capital from the financial-ratio perspective of PT. Bank SUMUT. The research method used is a survey approach. The research type is a quantitative descriptive and the characteristic is an explanatory descriptive. Data collecting method is done by providing a list of written questions and documentation study. Data analyzing method used is the multiplelinear regression and SPSS software. The result of descriptive-statistical analysis shows that intellectual capital which consists of customer capital, human capital, and structural capital and the managerial performance of PT. Bank SUMUT is categorized very agreeable and each variable tested is normally distributed. The simultaneous-research result shows the intellectual capital which consists of customer capital, human capital, and structural capital influence positively and significantly the managerial performance of PT. Bank SUMUT. The partialresearch result shows the variables of customer capital, human capital, and structural capital influence positively and significantly the managerial performance of PT. Bank SUMUT. The financial-ratio perspective shows it is in line with the managerial performance of PT. Bank SUMUT. The determinantcoefficient value (adjusted R square) is 82.2% which means that the ability of customer capital, human capital, and structural capital can describe the variation of managerial performance of PT. Bank SUMUT, and the remaining 17.8% is influenced by other variables excluded from the analysis.Keywords: Intellectual Capital, Customer Capital, Human Capital, Structural Capital, Managerial Performance