Financial technology (FinTech) has emerged as a transformative force reshaping financial systems, particularly in developing economies such as Nigeria. This study examines the influence of FinTech adoption on financial inclusion within Nigeria’s evolving digital economy, positioning the analysis within the broader context of financial system development and economic growth dynamics reflected in existing fiscal and taxation literature. Although prior studies have extensively explored taxation, revenue generation, and economic growth relationships in Nigeria, limited attention has been given to how technological innovation in financial services contributes to inclusive economic participation. Drawing insights from empirical studies on fiscal development and economic structures (Abomaye-Nimenibo, W. A. S., Micheal, J. E. M., & Friday, H. C., 2018), this paper constructs a conceptual-analytical framework linking digital financial adoption to expanded access to financial services. Using a qualitative synthesis methodology, the study integrates findings from existing Nigerian economic literature to establish how structural financial reforms, policy shifts, and institutional readiness influence inclusion outcomes. The results suggest that financial system efficiency, policy stability, and revenue structures indirectly shape digital financial inclusion pathways. The study concludes that FinTech adoption significantly enhances financial accessibility, reduces exclusion barriers, and improves economic participation, while also identifying infrastructural and regulatory constraints. Policy implications highlight the need for strengthened digital infrastructure, regulatory harmonization, and inclusive financial innovation strategies.