Voluminous work has catalogued the utility of Rusbult's (1980) investment model of commitment processes in understanding why some relationships persist whereas others fail. To date this work has been conducted almost exclusively with samples of English‐speaking individuals. To facilitate testing novel hypotheses among Spanish‐speaking populations as well examining various cross‐cultural questions, we present a Spanish version of the Investment Model Scale (Rusbult, Martz, & Agnew, 1998). With a sample of Spanish‐speaking individuals from Chile, we demonstrate that our translation has the same structural properties as the English version (Study 1) and has good predictive validity (Study 2). The Spanish version of the Investment Model Scale will enable researchers to sample a larger subset of the population and allow for the examination of cultural influences on relationship processes.