Financial inclusion, or equal access to financial services, is crucial to global economic progress. This extensive study examines how financial technology (fintech) advances this noble cause. The introduction sets the stage for our study of fintech’s transformational potential in financial inclusion. The literature study explains fintech’s history and complex relationship with financial inclusion. Our analysis is set against the backdrop of fintech technologies’ transformation of the financial services sector. The next part discusses fintech developments like mobile banking and blockchain and their substantial benefits in decreasing financial inclusion barriers. We examine how new technologies have increased financial access, especially for marginalized people. The authors also aim to identify and analyse financial exclusion barriers such as lack of financial services, literacy, and infrastructure impacting equal access for all. The study also explains how financial inclusion boosts economic growth, poverty alleviation, and social development beyond morality. Digital payment systems, peer-to-peer lending, and new credit scoring algorithms are examples. We recognize fintech’s implementation issues and concerns, but its potential is promising. Regulatory frameworks, cybersecurity hazards, and data privacy are important here. Our study examines how governments promote financial inclusion. The paper also studies impact evaluation and measurement methods to evaluate financial inclusion activities. The next section lists metrics for measuring financial inclusion programmes. While the impact assessment is difficult, measures provide vital insights. Complexities including context, data restrictions, and long-term consequences must be considered. Finally, our research shows how fintech supports the sustainable development goals. We examine how fintech-driven financial inclusion affects sustainable development. This report provides a detailed overview of fintech and financial inclusion’s dynamic relationship. It highlights fintech’s disruptive promise while navigating its intricacies and pitfalls. We have vital insights to improve financial inclusion in our ever-changing financial landscape as researchers, educators, policymakers, and practitioners.