This study explores the moderating role of management style on the relationship between budgetary control systems and investment management of tertiary institutions in Bayelsa State, Nigeria. The study adopted cross sectional survey research design and the population consisted of all the tertiary institutions in Bayelsa State and random sampling was utilized. Primary and secondary sources of data collection were employed with questionnaire as the major instrument of data collection after validity and reliability tests. A total of 343 questionnaires were administered and 241 were used for data analysis. The responses obtained from the administered questionnaires were statistically analysed using descriptive and inferential statistics. The findings reveal a positive and significant relationship between budgetary planning, budgetary coordination, budgetary monitoring, budgetary participation and budgetary reporting on investment management of tertiary institutions in Bayelsa State, Nigeria. Also, a positive and significant moderating effect of managerial style on the relationship between budgetary control system and investment management of tertiary institutions in Bayelsa State, Nigeria. The study highlights that leadership behaviour is a critical contextual factor that shapes how budgetary controls translate into strategic investment outcomes. These insights have practical implications for institutional governance, emphasizing the need to align budgeting processes with leadership development and organizational culture. The study contributes to the literature by deepening understanding of behavioral influences on financial management and recommends further research on how digital transformation and the use of financial management information systems interact with managerial styles to influence budgetary control and investment outcomes.
Keywords: budgetary monitoring, budgetary participation, budgetary planning, cash flow management, managerial experience
