Objective. This study sought to identify processes linking daily parental need experiences to daily parenting, focusing on the intervening role of parental psychological availability and stress. Design. In total, 206 mothers (Mage = 40.33 years) and 206 fathers (Mage = 42.36 years) and their elementary school child (Mage = 9.93 years; 46.6% female) participated in a 7-day multi-informant diary study. Results. Parents' daily need satisfaction was related to more daily psychological availability and lower daily stress in parent-child interactions, but parental need frustration related to less daily psychological availability and more stress. Psychological availability and stress were related to more daily parent-reported and child-perceived autonomy support and psychological control, respectively. However, parental need-based experiences were related to children's reported parenting only indirectly (i.e., through psychological availability and stress). These associations were obtained at the within-day level but not in models predicting parenting the next day. Conclusion. Parental need-based experiences are a critical resource for parenting.