The current study investigated discrepancies in self‐, partner‐, and meta‐perceptions of the Big Five traits and their associations with relationship satisfaction in intimate couples. The study was based on a subsample of the Swiss study “Co‐Development in Personality: Longitudinal Approaches to Personality Development in Dyads Across the Life Span” (CoDiP) including cross‐sectional data of 216 heterosexual couples. We adapted the Latent Congruence Model (LCM) for the study of discrepancies in personality perceptions in dyads. Beyond personality trait levels, the discrepancies between self‐ and partner‐perceptions and between partner‐ and meta‐perceptions of the Big Five traits were related to relationship satisfaction as actor and partner effects. In general, flattering and favorable partner‐perceptions in relation to self‐ and meta‐perceptions seem to positively contribute to relationship satisfaction. The present study implies that not only personality trait levels but also discrepancies between personality perceptions are important for understanding relationship satisfaction.