Honesty is a virtue that is highly valued across societies, yet can be challenging to enact, especially when truthful expressions may hurt others. We tested preregistered hypotheses on the distinct personal and interpersonal effects of expressed honesty, perceived honesty, and honest connections (i.e., accurate perceptions of expressed honesty) on well-being and change among couples. Romantic partners (N = 214 couples; N = 428) discussed a desired change in the lab and reported on their well-being and motivation to change concurrently and three months later. Honesty and well-being were self-reported and rated by observers, with results indicating correspondence between self and observer reports. Results of multilevel response surface analyses showed that greater expressed and perceived honesty—but not honest connections—predicted greater personal well-being, relationship quality, and target motivation to change concurrently, with some benefits emerging over time. Results could not be explained by couples’ baseline relationship satisfaction, communication styles, or the severity of the issue discussed. Benefits were most observed for self-reported honesty, suggesting that the internal experience and perception of honesty is most consequential for relational outcomes. The current results have important implications for understanding honesty as an interpersonal communication process. We find that honesty can benefit relationships even when the truth may hurt, with more expressed and perceived honesty fostering better relationships regardless of whether couples share in that perception of honesty.