Background: Joint physical custody is a parental care arrangement in which children live roughly an equal amount of time with each parent after family dissolution, residing alternately in each of the two parental households. Because joint physical custody is characterised by fathers' continued involvement in their children's lives, this care arrangement is believed to compensate for the negative effects of family dissolution, and to contribute to children's well-being in post-separation families. Objective: This study aims to investigate potential differences in the experiences of stress of children living in joint physical custody and sole physical custody arrangements, while considering both the proportion of time the children spend with each of their parents and the number of transitions the children make between the parental households. Methods: Based on data from the Family Models in Germany (FAMOD) study, a national convenience sample, linear regression models were estimated for 297 children between the ages of 11 and 14. Results: The statistical analysis suggests that there was no significant association between the physical custody type (sole physical custody vs. joint physical custody) and the children's levels of stress. In addition, the results revealed that children's experiences of stress did not depend on how often they moved between their parents' households. Conclusions: This study does not corroborate the assumption that joint physical custody has a protective effect on children, but instead suggests that different physical custody arrangements are associated with different stressors that lead to similar levels of stress in children living in different post-separation families.