Personal money management is an important part of a self-determined life. When assistance needs increase, many care recipients require help with bills, purchases, paperwork or budget planning. Third-party money management (TPMM) is thus a prevalent care-giving task in long-term care (LTC), essential to care recipients’ wellbeing and financial security. However, research on this phenomenon is scarce, scattered over time and research locations, and lacks consistent terminology. This article sheds light on the under-explored topic of TPMM for care-dependent people. It explores the scope and characteristics of TPMM, develops dimensions to characterize practices and mechanisms of TPMM and identifies aspects of good TPMM practice to balance personal autonomy and support by care-giving. In this scoping review (PRISMA-ScR), we analysed 35 scientific and non-scientific publications, retrieved from multiple databases and via citation searching. We found reports on various TPMM practices ranging from occasional help to official substitute decision-making. To grasp the complexity of support arrangements, we synthesized four dimensions, by which TPMM practices can be characterized: (1) degree of formalization, (2) degree of collaboration, (3) type of care provision and (4) degree of digitalization. We furthermore identified six aspects constituting good practices of TPMM, from collaborative decision-making to adequate fintech design. Future key research areas include the collection of comprehensive data on money management assistance needs and related care tasks, an exploration of TPMM issues in formal care settings, the role and responsibility of financial institutions, (digital) solutions to support TPMM, and detailed insights into the support needs of informal (financial) care-givers.