E-commerce adoption offers significant opportunities for small and medium-sized enterprises (SMEs), particularly in developing economies. However, numerous financial barriers negatively impact the uptake of e-commerce technologies as well as continuous use of those who have adopted e-commerce which hampers these businesses from achieving their full potential. This paper investigates these barriers through a comprehensive literature review, focusing majorly on SMEs’ financial constraints. The study initially discusses the rationale for choosing financial barriers and then further categorizes barriers into internal and external financial constraints and evaluates their impact on e-commerce adoption. The findings highlight the need for targeted financial support mechanisms and strategic interventions to facilitate e-commerce integration among SMEs as well as gives core findings which can be targeted by stakeholders which includes policymakers, researchers as well as owner/managers.