Fiscal Policy and Economic Growth: The Role of Government Expenditure, Taxation, and Public Investment

Fiscal policy is one of the principal instruments through which governments influence economic activity, allocate resources, redistribute income, provide public goods, and promote long-term development. Government expenditure, taxation, and public investment affect aggregate demand in the short run while also shaping productivity, capital formation, employment, private investment, and potential output over the longer term. This paper examines the relationship between fiscal policy and economic growth, with particular emphasis on the composition and efficiency of government expenditure, the structure of taxation, and the productivity of public investment. Using a systematic literature review and conceptual analytical approach, the study synthesizes theoretical and empirical perspectives on the growth effects of fiscal policy. The analysis indicates that the relationship between fiscal policy and economic growth is neither uniformly positive nor negative. Productive expenditure on infrastructure, education, healthcare, research, technology, and institutional capacity can enhance human and physical capital and improve private-sector productivity. Conversely, inefficient spending, persistent fiscal deficits, poorly targeted subsidies, excessive debt accumulation, and unproductive public expenditure can weaken fiscal sustainability and reduce the resources available for productive investment. Taxation provides the revenue necessary to finance development, but poorly designed or excessively distortionary taxes may discourage investment, entrepreneurship, labor supply, and formal economic activity. Public investment can generate substantial economic benefits where projects are carefully selected, efficiently implemented, and supported by effective institutions. The paper concludes that the quality, composition, financing, and institutional management of fiscal policy are as important as its overall size. Sustainable growth requires a balanced fiscal framework combining productive expenditure, efficient and equitable taxation, high-quality public investment, fiscal discipline, and effective public-sector governance.