A self-managed superannuation fund (SMSF) is a trust structure that provides benefits to its members upon their retirement. The difference between a SMSF and other superannuation funds is that they are, as the name suggests, controlled by the members of the fund. That means the members are also the trustees running the fund for their own benefit. In the case of a corporate trustee, all eligible members of the fund must also be directors of the trustee company.