In Nigeria, governmental inefficiencies and mismanagement of public resources have led to challenges in fulfilling societal needs effectively. To address these issues, various financial management reforms have been implemented, aiming to enhance transparency, accountability, and efficiency. However, the impact of these reforms on government expenditure remains uncertain due to persistent corruption and operational challenges. This study investigates the influence of public sector financial management reforms, including the Government Integrated Financial Management Information System (GIFMIS) and the Integrated Personnel and Payroll Information System (IPPIS), on government expenditure in Nigeria. A conceptual framework is proposed to understand the relationship between these reforms and expenditure. Theoretical and empirical reviews provide insights into the context and previous findings related to financial management reforms. The methodology involves survey research and secondary data analysis, focusing on 16 years of data from federal ministries. Descriptive statistics and regression analysis are used to analyze the data. Results suggest mixed findings regarding the impact of GIFMIS and IPPIS on government expenditure, with some indications of potential effects but inconclusive statistical significance. Discussion of findings highlights the complexity of reform implementation and the need for further research to inform policy decisions effectively. Recommendations include conducting comprehensive studies, enhancing monitoring mechanisms, capacity building, addressing implementation challenges, promoting transparency, sustaining political will, sharing best practices, and engaging stakeholders.
 Keywords: Public Sector Financial Management Reforms, Government Expenditure, GIFMIS, IPPIS, Nigeria, Governance.