The objective of this study is to examine the aspects of investment in human capital like training of employees, education level of employees, knowledge level of employees, and skills of employees that influence the performance of a bank and to provide some comments to improve the banking sectors. This research included a conceptual model along with hypotheses. This empirical study is based on primary data. The data were obtained by the convenient sampling procedure with a questionnaire using the seven-point Likert scale. The hypothesized model has been validated using data from 261 participants, and an analysis was conducted using the system of structural equation modelling. The results revealed that investment in training, knowledge level and skills of the employee were positively connected to bank performance at less than 1% and a 5% level of significance. But the employee’s educational level does not substantially affect bank output in this analysis. The focus field is the study of the human capital investments of the Human Resources Division at Janata Bank Limited. It investigates different aspects of the Janata Bank’s facilities as well as the problems and prospects. Thus, this study can be a policy dialogue for the managers, owners, decision-makers, and academicians.