Structural Inefficiencies in Cross-border Digital Payments: The Relationship Between Cost, Speed, Foreign Exchange Fluctuations, and Consumer Behavior

Abstract

Cross-border digital payments have become an essential component of global commerce and personal remittances. Despite rapid technological adoption, these payment systems continue to exhibit persistent inefficiencies, including elevated transaction costs, delayed settlement, and exposure to foreign exchange fluctuations. Existing discussions often address these issues in isolation, providing limited insight into their structural interdependence. This paper develops a structural and mechanism-based analytical framework to examine the interaction among payment costs, settlement speed, and foreign exchange volatility within cross-border digital payment systems. By positioning settlement time as a central transmission channel, the analysis explains how foreign exchange risk is converted into effective payment costs under different institutional arrangements. The study further incorporates a consumer behavior perspective, demonstrating how cognitive perception, trust, and risk tolerance mediate payment method selection under structural constraints. The findings suggest that settlement speed plays a pivotal role in reinforcing the trade-off between cost efficiency and payment predictability, with implications for both system-level performance and user behavior. Based on this framework, the paper proposes system-level improvement directions aimed at enhancing transparency, reducing structural costs, and mitigating foreign exchange risk exposure. The analytical approach developed in this study provides practical insights for fintech product design, regulatory policy, and the broader evolution of cross-border payment infrastructure.