This study examined how destructive conflict behavior and relational maintenance behavior are linked to financial loss in adult romantic relationships. Based on conservation of resources (COR) theory, it was hypothesized that financial loss indirectly (through anxiety) predicts increased destructive conflict behavior and decreased relational maintenance behavior. Across three waves of data, results indicated that financial loss significantly predicted passive‐destructive conflict behavior (i.e., neglect) through anxiety. Financial loss did not, however, directly or indirectly predict active‐destructive conflict behavior (i.e., exit). Financial loss negatively predicted relational maintenance behavior, but that effect was found only from Wave 1 to Wave 2 and was not mediated by anxiety. Overall, results support COR theory and identify some of the specific relational consequences of financial difficulty.