Child maltreatment represents a prevalent public health issue that has been shown to predict both adolescent and young adult depressive symptoms and heavy episodic drinking; however, little is known regarding how associations between specific types of maltreatment (e.g., physical abuse, sexual abuse, care neglect, supervisory neglect) and depressive symptoms and heavy episodic drinking change across adolescence and into young adulthood. Similarly, there is lack of research that has examined how an accumulation of child maltreatment types relates to depressive symptoms and heavy episodic drinking across ages. Time-varying effect models—a statistical approach that allows researchers to pinpoint specific ages where the association between two variables is strongest—were used in the current study to address these gaps. Nationally representative data came from the first four waves of the National Longitudinal Study of Adolescent to Adult Health (Add Health; N = 16,053; 49.4% female; 51.0% European American/White, 21.0% African American, 10.2% Biracial, 9.1% Hispanic; MAGE W1 = 17.00). Results suggested that certain types of maltreatment are more predictive of negative outcomes than others and that different types of maltreatment confer greater risk in different developmental periods. In addition, while victims of between one and three types of maltreatment had comparable prevalence of depressive symptoms and heavy episodic drinking across adolescence and young adulthood, victims of four types of maltreatment had a much higher prevalence of these outcomes indicating the extreme risk that accompanies an accumulation of maltreatment.