As members of the Australian workforce approach retirement, they are being presented with increased choice in their superannuation investments. With increased choice has come greater personal responsibility for ensuring adequate retirement savings. This paper explores gender differences in superannuation investment choices through a range of interactions with individual demographics and in doing so a gender effect can be further refined than previous research has identified. The data for this paper comes from a survey of members of the Superannuation Scheme for Australian Universities (SSAU).