The context of this paper is the changing nature of later life in the United Kingdom. It examines some of the broader issues of early retirement. While there has been considerable debate about the restructuring of employment during the latter part of the 20th century which led to a shake-out of older workers from the labour force, less attention has been given to those who take voluntary early retirement. Given the importance of early retirement to the economy and to social policy, it is important to find out how individuals make retirement decisions. The paper examines the results of a semi-structured interview study of the decisions made by a purposively drawn sample of British civil servants who are participants in the Whitehall II study. The sample included participants who chose early retirement and those who did not. From the interview data, ideal types of possible routes into retirement have been constructed. Illustrating these ideal types, individual life histories are drawn upon to show how responses to the issues surrounding retirement feature in people's lives. It is argued that decisions about early retirement are not made in a vacuum, neither are they free from pressures or inducements. Some are to do with organisational restructuring, some are about financial offers, and some are influenced by the opportunities for leisure and self-fulfilment that early retirement offers. The paper concludes by arguing that early retirement needs to be studied as a process involving the interplay between structure and agency.