Extensive research has demonstrated that couples' communication quality is related to many aspects of couples' lives, including relationship satisfaction. However, the possibility that the quality of couples' communication might vary as a function of the topic of communication and the implications of this variability have received relatively little attention. Accordingly, this study sought to examine (a) within-person variability in communication quality between topics, (b) associations with relationship satisfaction, and (c) associations with stressors focal to specific topics. Black coparenting couples (N = 344) reported on their communication quality around four topics: finances, children, racial discrimination, and kinfolk. Results indicated that communication quality significantly differed across topics. Communication quality was lowest for finances and kinfolk, significantly higher when discussing problems with children, and highest when discussing racial discrimination. Moreover, communication quality when discussing finances, kinfolk, and racial discrimination each uniquely predicted relationship satisfaction, even after controlling for each other and for general communication skills. Experiencing more stress around finances and children was associated with poorer communication quality in the focal area (and for financial stress, in some other communication topics as well), whereas the extent of racial discrimination was not significantly associated with communication quality for any topic. These findings reveal significant variability in couples' communication across topics and demonstrate that considering communication for different topics can offer unique information about couples' relationship satisfaction beyond general communication skills. Further research examining topic-specific communication quality may enhance understanding of and interventions for couples' communication. (PsycInfo Database Record (c) 2023 APA, all rights reserved).