The purpose of this article is to construct a new theoretical framework of care-giving that places age, and the life-course stage of carers, at the centre of conceptual understanding and analysis. Although care theory is heavily gendered, it pays far less attention to age differences among the diverse participants in care-giving. This article argues that the age and life-course stage of carers is central to differential pathways into care-giving, experiences of care-giving, and effects of care-giving in the present and future. To support this, the article draws on qualitative data from a study on the circumstances and experiences of Australian children and young people who provide care for family members with disability or chronic illness. Claiming that theories of care are incomplete if age differences, intersecting with gender and other socio-demographic differences, are not treated as central to the conceptualization, the article outlines a framework for an age-sensitive theory of care-giving.