Accurately perceiving others’ personalities helps people to successfully navigate their social relationships. However, it is not yet clear whether people can accurately perceive one aspect of people’s personalities that may be especially important to understand: motivations. Using the fundamental social motives framework, we examined the extent to which people accurately perceived a friend’s motivations (vs. big five traits) and how this was related to friendship quality. A sample of friend dyads completed both self- and friend-assessments of the big five traits and the fundamental motives, and rated friendship quality. Perceivers accurately detected their friend’s unique, self-reported ordering of motives (i.e., distinctive accuracy), though to a lesser extent than traits. However, accuracy for motives and traits was positively associated with greater friendship quality to a similar extent. Importantly, these associations emerged above and beyond tendencies to view others highly normatively, as socially desirable, and as similar to the self.