This study examined the mediating function of green motivation in the association between green social support and electronic finance repurchase behavior, utilizing social support theory. Data were gathered using an online survey in Vietnam and analyzed utilizing SmartPLS 4. The findings validated that green information support and green emotional support substantially impacted green motivation, which therefore enhanced electronic finance repurchase behavior. Green motivation was identified as a partial mediator in the interactions between both types of green social support and repurchase behavior. The findings underscore the significance of social impact in facilitating the adoption of electronic finance and indicate that enhancing green motivation through information and emotional support can promote sustainable financial habits.