Premarital cohabitation has been understudied in China, and its impact on marriages in the region remains largely unexplored. This study examines the implications of premarital cohabitation for gender inequalities in Chinese marriages. The author analyzes how married couples with and without the experience of premarital cohabitation compare in the amounts of time they spend doing housework, whether the differences can be attributed to social and economic factors, and to what extent the experience of cohabitation equalizes the gendered division of housework. Drawing on four waves of data (2010, 2014, 2016, and 2018) from the China Family Panel Studies, this study is one of the first to provide nationally representative evidence on the relationship between premarital cohabitation and housework in China. Propensity score weighting and linear mixed effect models were employed. In contrast to findings from Western contexts, this study finds that in China, premarital cohabitation is not associated with a smaller gender gap in housework time after accounting for factors that affect selection into cohabitation. However, premarital cohabitation was associated with a significant decrease in women's housework time among urban residents and couples married after 1995, while its effect on men's housework time was not significant. Findings from this study highlight a gendered cohabitation effect on housework hours in China and underscore the importance of contextualizing the meanings of cohabitation and housework in non-Western contexts.