This study aimed to test the relationships between body mass index, emotional eating, compulsive behaviors, and perceived financial well-being in a single model in Türkiye. 1240 people over 18 years of age, who were determined by convenience sampling, participated in the study. Regression and mediation analyses were performed using CB-SEM. According to the results, BMI affects emotional eating and compulsive buying behavior in both men and women. While compulsive buying behavior affects current money management in both women and men, it has a significant effect on future financial security in women but no significant effect in men. Emotional eating partially mediates the relationship between body mass index and compulsive buying in women and is fully mediated in men. This study is the first to examine the relationship between body mass index as a measure of obesity and emotional eating, compulsive buying behavior as a mental disorder, and financial well-being as a result of purchasing decisions.