This research explores the role of materialism, and social comparison to brand addiction in relation to compulsive buying. A structural equation modeling was used to analyze data through partial least squares by collecting online data in Vietnam. The research findings explain social comparison is an antecedent leading to addictive behavior. Materialism mediates and increases the addictive behavior when consumers are significantly impacted by social comparison. In addition, brand addiction leads to word-of-mouth and willingness to pay premium price when consumers are set under social comparison and materialistic tendency. The managerial and theoretical application is also provided in this research.