This study investigates the impact of financial technology (FinTech) on the financial performance of listed commercial banks in Nigeria, focusing on the effects of Automated Teller Machines (ATM), Point of Sale (POS) systems, Internet Banking (IB), and Mobile Banking (MOB) on Net Profit Margin (NPM). Using panel data from 2013 to 2022, the study analyzes four systematically selected Deposit Money Banks (DMBs)—Zenith Bank, UBA, Access Bank, and Wema Bank—chosen based on their consistent reporting and representative scale in Nigeria’s banking sector. Employing Pooled Ordinary Least Squares (POLS) regression, the results show that POS and Mobile Banking significantly and positively affect profitability, while ATM has a significant negative impact and Internet Banking shows no significant effect. The findings suggest that newer FinTech channels such as POS and Mobile Banking outperform legacy systems due to their cost-efficiency, scalability, and alignment with consumer preferences in low-infrastructure environments. Conversely, ATMs and Internet Banking are hindered by high maintenance costs, limited accessibility, and slower adoption, reflecting structural and infrastructural constraints within Nigeria’s digital ecosystem. These results underscore the need for banks to reconfigure their FinTech strategies in favor of mobile-first and POS based innovations that align with evolving market dynamics and consumer behaviors. Moreover, the findings have broader policy implications for regulators and stakeholders seeking to deepen financial inclusion and digital transformation across the banking industry. This study contributes to the growing literature by offering a channel-specific analysis that emphasizes contextual realities in emerging markets.