This study inherits and develops the Kovach model (1987), also references researches related to employee motivation to find out factors affecting the work motivation of staff working at official credit institutions in Ham Thuan Bac district, Binh Thuan province. Research data are collected from 176 employees working at official credit institutions by convenient sampling. Applying exploratory factor analysis and multivariate linear regression, the study has demonstrated impacting factors to employee motivation. They include learning and promotion opportunities, income and benefit, care and recognition, working environment, leadership style, nature of work, workplace relationship, empowerment, and job stability. Especially, the factor of learning and promotion opportunities has the most influence on the working motivation of official credit employees in Ham Thuan Bac district, Binh Thuan province