This study examines the role of political power on the process of budget monitoring in the context of the fertilizer manufacturing industry in Indonesia. The objectives of this study are: (a)to investigate the relationship between budget monitoring and managerial roles, (b) to examine the two-way interaction effect between budgets monitoring and politics on managerial roles, and (3)to identify the effect of departmental power on the two-way interaction between budgets monitoring and politics affecting managerial roles. The sample for this study consists of four public sector fertilizer-manufacturing enterprises in Indonesia. This study uses a questionnaire survey supplemented by structured interviews. The questionnaire, adapted from previous studies, utilizes a seven-point Lilcert scale. Respondents to the questionnaire were middle managers. The results provide substantial evidence that interaction between budget monitoring and politics affect managerial roles; and that the departmental power plays a significant role on such interactions.