With the use of a modified job-search theory, a conceptual framework is developed to show that some factors influence marriage timing by either facilitating or impeding assortative mating. Transition-to-work is emphasized because work structures people’s lifestyles and is the major source of socioeconomic status; however, its nature is often unpredictable in early adulthood, while other personal attributes emerge early. The theory is applied to the dynamics of assortative mating under two contrasting scenarios: when gender roles are highly segregated, and when women’s economic roles start to resemble those of men. Finally, the implications of the analysis for Becker’s reduced-gains-to-marriage argument are assessed.