This paper investigates the influence of remittance inflows on Nigeria’s economic growth over the period 1981–2024. The analysis focuses on both short-run dynamics and long-run relationships, while also considering the roles of foreign direct investment (FDI) and foreign portfolio investment (FPI). Annual data were obtained from the Central Bank of Nigeria and World Bank statistics. Using the autoregressive distributed lag (ARDL) framework and an associated error correction model, the study finds that remittances consistently promote economic growth in Nigeria in both the short and long horizon, with household consumption serving as the main transmission pathway. By contrast, FDI and FPI did not demonstrate long-run growth-enhancing effects during the study period. The significance of the error correction coefficient affirms a stable adjustment toward long-run equilibrium among the variables. Based on these results, the study suggests that policymakers should improve formal remittance channels, lower transfer costs, and design incentives to channel part of remittance inflows into productive investment to enhance their sustained growth contribution.