Help with activities of daily living for people in the community is provided through formal services (public and private) and informal (often unpaid) care. This paper investigates how these systems interlock and who is at risk of unmet need. It begins by mapping differences between OECD countries in the balance between formal and informal care, before giving a detailed breakdown for the UK. New analysis of UK Family Resources Survey data for 2012/13 and 2013/14 suggests high levels of unmet need.