This study investigates the effects of covariates on the probability of placement breakdown in non‐kinship family foster care. Breakdowns are distinguished according to the initiator: children, carers, foster parents and the local child welfare authorities. The children concerned had entered foster care at ages ranging from 0 to a maximum of 17 years (n = 14 171). A significantly higher risk of breakdown on the initiative of the foster parents is found in male children, children whose parents receive financial support, children whose parents were removed from the register of carers, children who were between 6 and 15 years old when they joined the foster family, children who had earlier lived in a different foster family or residential care, children from patchwork families and children whose joining of a foster family was the result of disruptive social behaviour. Two‐thirds of the children from non‐kinship family foster care who stay in the foster family was ended on the initiative of the foster parents are subsequently looked after in residential care. That is three times the rate for all terminated foster relationships. Breakdowns on the initiative of the foster parents thus indicate a high risk of unstable care history developing and accordingly necessitate prevention strategies.