The rise of online shopping platforms and digital payment methods has significantly influenced consumer behavior by making online purchasing more convenient and accessible. However, this convenience has also contributed to increased overspending, as many people engage in impulsive purchases without considering the financial consequences. Such behavior is often linked with psychological and cognitive factors and ,in certain cases, may be considered as behavioural addiction. The current study explores the neuropsychological and personality traits of people with high online spending habits, with special focus on the role of cognitive abilities and personality characteristics in impulsive online purchasing behavior. Cognitive functions involved in executive functioning, attention, memory, and decision-making are essential for impulse control and evaluating consequences, and deficiencies in these abilities may contribute to of excessive spending. In addiction, people with high levels of impulsivity and neuroticism, along with low conscientiousness, may be more likely to engage in excessive online spending. The study used a comparative cross-sectional design and involved adult people who frequently engage in online shopping. High online spenders were compared with individuals who showed moderate or low spending habits. Moreover, the research examined personality traits, impulsivity, self-control, executive functioning, memory, and decision-making abilities measured using standardised psychological tools. The results of the study may show that people who frequently participate in online shopping tend to show high impulsivity and poor executive control. This may indicate the interaction between neuropsychological factors and personality traits plays a strong influence in online shopping behavior.