Basic personality features have been found to be associated with a variety of romantic relationship outcomes including the strategies that individuals employ to retain their romantic partners. In the current studies, we were interested in determining whether pathological personality features were associated with mate retention behaviors. We examined the associations between the pathological personality features captured by the PID-5 and mate retention behaviors across two samples (i.e., an undergraduate sample and a community sample). Pathological personality features reflecting negative affect, detachment, and antagonism were associated with mate retention behaviors such that individuals who possessed these features were less likely to provide benefits to their partner and more likely to inflict costs on them. Discussion focuses on the implications of these findings and how they can influence the tactics that individuals employ to maintain their romantic relationships.