BackgroundFuture medical and financial planning is important for persons with dementia given the impact of the disease on capacity for decision making.AimsTo explore from the perspective of carers of persons with dementia: (1) Participation in future medical and financial planning by the person they care for, including when planning was undertaken and the characteristics associated with having an advance care directive completed; (2) The type of healthcare providers who discussed advance care planning following diagnosis; and (3) Preferences for timing of discussions about advance care planning following diagnosis.MethodsRecruitment and data collection took place between July 2018 and June 2020. Carers of persons with dementia aged 18 years and older were mailed a survey. Participants completed questions regarding completion of various future planning documents by the person they support, including time of completion and who discussed advance care planning following diagnosis. Participants were presented with information about the benefits and consequences of early and late discussions of advance care planning and asked when discussions about advance care planning were best initiated.Results198 carers participated. Most participants were female (74%) and had been a carer for more than 2 years (82%). Most participants reported that the person with dementia they support had made a Will (97%) and appointed an Enduring Guardian (93%) and Enduring Power of Attorney (89%). Only 47% had completed an advance care directive. No significant associations were found between characteristics of persons with dementia and completion of an advance care directive. Geriatricians (53%) and GPs (51%) most often discussed advance care planning following diagnosis. Most carers thought that discussions about advance care planning should occur in the first few weeks or months following diagnosis (32%), at the healthcare provider’s discretion (31%), or at the time of diagnosis (25%).ConclusionsMore than half of persons with dementia do not have an advance care directive. There is variability in preferences for timing of discussions following dementia diagnosis.