The objective of this paper is to investigate the service needs and support costs of elderly people with cognitive impairment on hospital and community health services, primary health care, social services, and informal carers in England. It examines the resource consequences of major changes in the provision of care, exploring the implications for both cost and effectiveness. The study was designed to provide a secondary analysis of the OPCS disability surveys in order to estimate the balance of care, and current provision of services. It also estimates of costs of present provision and potential policy options. Results show large scale improvements in the provision of care for people living in private households and local authority homes require significant increases in funding, but reductions in the provision of long-stay hospital beds can significantly reduce the cost burden to the public purse. Given the increasing demand pressure on health and social care expenditure, it seems unlikely that large scale improvements in the care supplied to elderly people with cognitive impairment can be achieved without some change in the balance of care. The cost of implementing improvements in care for the 200000 people living in private households and the 45000 people in local authority homes could be offset by reducing the provision of costly long stay hospital provision with alternative institutional care such as NHS nursing homes.