This dissertation examines how digital wallets influence consumer spending behavior in Greece, with a focus on the psychological mechanisms that may explain this relationship. Although digital wallet use has grown rapidly, most prior research has focused on why consumers adopt these tools rather than how they shape spending once in use. Evidence from Greece also remains limited. The study focuses on two key psychological perceptions: Psychological visibility of spending and perceived spending control. It also examines impulse buying as a mediating mechanism between these perceptions and spending behavior.

A quantitative, cross-sectional research design was adopted. Primary data were collected through an online questionnaire completed by 153 active digital wallet users living in Greece. The main constructs measured were Psychological Visibility of Spending, Perceived Spending Control, Impulse Buying, and Spending Behavior. The data were analyzed in SPSS using descriptive statistics, reliability tests, Pearson correlation, linear and multiple regression, and mediation analysis through PROCESS Model 4.

The findings show that reduced psychological visibility of spending and reduced perceived spending control are both strongly associated with impulse buying. Impulse buying also significantly predicts spending behavior. Reduced psychological visibility of spending has both a direct positive relationship with spending behavior and an indirect relationship through impulse buying, indicating partial mediation. The role of perceived spending control is more complex and operates mainly through impulse buying.

This study contributes to the limited research on digital wallets and consumer spending behavior in Greece by showing that psychological factors may play an important role in how consumers spend when using these payment methods. The findings offer practical value for consumers, digital wallet providers, and policymakers as digital payments continue to expand.