Abstract
Over one half of young adults have lived or will live with a partner before marriage. Many studies indicate that the majority of cohabitors plan to marry their partners, yet research examining relationship progression is rare. This article deciphers the processes underlying entrance into informal unions. Data are from 25 open‐ended interviews with cohabitors who had lived together for at least 3 months. For many, the relationship progressed rapidly; over one half moved in with partners within 6 months of initiating romantic relationships. Primary reasons for cohabiting included finances, convenience, and housing needs; cohabiting as a trial marriage was not mentioned as the principal reason for moving in together. Plans for marriage remain abstract even when respondents determine that they and their partners are compatible.