This study examines the impact of Foreign Direct Investment (FDI) on the economic development of BRICS countries (Brazil, Russia, India, China, and South Africa) from 2004 to 2023. FDI plays a pivotal role in capital formation, technological advancement, and employment generation, but its impact varies across these nations due to differing economic policies, market conditions, and institutional frameworks. This study uses panel data analysis, including fixed and random effects models, to assess the relationship between FDI (inflows and outflows) and key macroeconomic indicators such as GDP growth, inflation, unemployment, and exchange rates. The findings reveal that China dominates FDI inflows and outflows, while Brazil, India, and Russia exhibit moderate trends, and South Africa lags behind. Econometric results indicate that FDI outflows significantly enhance GDP growth, whereas inflows show a weaker impact. Macroeconomic stability, particularly exchange rate management and unemployment reduction, emerges as critical for sustaining growth. The Hausman test confirms the superiority of the fixed-effects model, highlighting the importance of country-specific factors in FDI's economic impact. The study concludes with policy recommendations, emphasizing the need for BRICS nations to stabilize investment climates, address economic volatility, and implement structural reforms to maximize FDI benefits. By fostering conducive environments for foreign investment and leveraging outward FDI strategically, these economies can achieve sustainable development and global competitiveness.