Background: Increasing numbers of older adults with intellectual disabilities are living with ageing parents. These families need support to plan for the future to avoid crisis interventions following parental death. Method: Interviews and focus groups were conducted with people with intellectual disabilities (aged 40+) (N = 9), parents (N = 11) and siblings (N = 16) to understand their perspectives about living with parents and future planning. Data were analysed using framework analysis. Results: Four themes were identified: 'What matters to me', 'When should we plan', 'What are the options' and 'Who will help'. Participants knew they needed to make plans but did not feel supported to do so. While they viewed moving as an opportunity for independence, they feared there were no viable alternatives. Conclusion: Person-centred resources and support are needed for families to plan for transitions in care, including proactive approaches from social services and help to prepare for conversations with social care professionals.