This study investigated the social psychology of Malaysian migrants and their ethnocentric purchase behavior as they assimilate into the local culture. A theoretical framework consisting of acculturation, consumer ethnocentrism, time, and demographics was assembled; and an exploratory study was undertaken involving 255 samples of Malaysian consumers residing in the UK. The findings suggest that levels of consumer ethnocentrism are inversely related to their length of residence in the host country. Hence, respondents who reside longest exhibit less ethnocentric behavior. Contrary to our prediction, no significant relationship exists between assimilation and consumer ethnocentrism. Of significance, however, highly assimilated individuals are likely to be young male and single persons, with low assimilation most likely found in middle-aged to older married females.