This study examines the development of digital payment systems and the impact of FinTech innovations on payment methods within a theoretical framework. It explores the historical evolution of online payment methods, mobile wallets, “Buy Now, Pay Later” (BNPL) applications, and the contributions of alternative credit models to financial inclusion. Furthermore, the study discusses the technological innovations introduced by the FinTech ecosystem, as well as the transformations in the financial system brought about by cryptocurrencies and blockchain-based payment solutions. While digital payment systems provide speed, security, and accessibility, they also pose new challenges related to regulation, security, and the protection of consumer rights. In this context, the study not only evaluates the current state of digital payment systems but also aims to provide guidance for future research.