Background and aims Approximately one quarter of adults aged 65 or older receive aged care services in their home, yet limited information exists on this population. This research aimed to explore their characteristics through secondary analysis of the 45 & Up longitudinal cohort study, and determine how they differ from those who do not receive in-home services. Methods We used Wave 4, Phase 1 of the 45 & Up study, a large prospective longitudinal study of adults aged 45 and older when recruited in 2005-2009. Data for this wave were collected in 2023-2025 and included questions regarding in-home aged care utilisation. Descriptive statistics were calculated, and logistic regression was completed to ascertain factors associated with in-home aged care use. Results A total of 14,799 individuals provided data for Phase 1 of Wave 4 of the 45 & Up survey, with a mean age of 74.1 (SD 6.5). Overall, 10.9% of respondents indicated they were receiving in-home aged care services, while 3.0% were waiting for approved services to commence. The most common services were domestic support (80.3%), home or garden maintenance (39.5%) and allied health (32.2%). Results of a logistic regression to examine factors associated with home care use, utilising the social-ecological framework will also be described. Conclusion In-home aged care use is common for older adults in Australia, and growing. A deep understanding of the characteristics and requirements of those seeking support is required to ensure appropriate tailoring of aged care services, and enable older Australians to age in place.