Economic restructuring and welfare reform are driving new forms of urban poverty in the global north. Shadow care infrastructures is a new frame for conceptualising the complex and interconnected practices through which marginalised people seek survival in this context. It remaps welfare landscapes across a continuum that includes formal and informal, established and improvised practice, the not-for-profit sector, informal community networks and exchange and the black market. Conceptually, it centres the care practices that sustain life and the infrastructures that sustain them. Activating a ‘shadow geographies’ tradition it foregrounds care infrastructures that are necessary, but rarely visible within, welfare discourse.