Many studies in the marketing literature focus on investigating the effects of brand attachment and self-congruence on favorable consumer behavior, such as brand loyalty, positive Word-of-Mouth, resilience to negative information (Thomson et al., 2005, Japutra et al., 2014a). However, limited studies examine the relationship between brand attachment, self-congruence and negative consumer behavior. For instance, Johnson et al. (2011) posit that when consumers are in relationships with brands and more self-relevant, they are more likely to induce retaliatory actions when the relationship ends. Highlighting the dark side of brand attachment, Japutra et al. (2014b) show that stronger brand attachment leads to a wide range of unwanted consumer behaviors including trash-talk, Schadenfreude, and anti-brand actions. These studies show how brand attachment is capable of hurting consumers. However, only limited studies pay attention on the negative consequences of brand attachment (e.g. Johnson et al., 2011; Japutra et al., 2014b). The purpose of this study is to investigate the effect of self-congruence and brand attachment on compulsive buying behavior.