In individualized marriages, spouses maintain independence in their relationship. In individualized marriages, do married couples manage their money in pooled accounts or do they keep separate accounts? We answer this question with the 2002 International Social Survey Programme (N = 18,587;31 country contexts) and examine how variation in the individualization of marriage is related to variation in resource integration within marriage. We make two contributions. First, we found that individualization matters. When couples understood and practiced individualized marriage, they were more likely to keep their money separate. The presence of individualized approaches to marriage and individualized alternatives to marriage within a country were also related to a higher likelihood of couples keeping money separate. Second, we found that integrating resources remained a constitutive part of marriage. Despite trends toward individualization and growing alternatives to marriage, most married couples continued to pool their money.