Background Because of an increase in life expectancy and de-institutionalisation, many adults with intellectual disability (ID) live with and are cared for by their parents throughout their adult lives. Because of caring demands, the quality of life (QOL) of parents may be affected. The study explored the impact of caring for an adult with ID on the QOL of parents. Methods Participants were 12 parents who were the full-time carers of an adult with ID. Participants were interviewed about the effect of caring on their QOL.