In a study of predictors of tuition expenditures on postsecondary education, the role of individual differences in religious affiliation was examined with a national sample of 3,615 individuals. Based on past findings, it was hypothesized that religious affiliation may serve as a moderator of the relationship of tuition expenditures with (a) parental income and (b) prior educational involvement (i.e., type of high school attended). Analysis indicated that religious affiliation may interact with prior educational involvement and so partially account for tuition expenditures.