You can have up to four members in an SMSF. However, over 90% of SMSFs have only one or two members, with the majority having two members.*
Importantly, all SMSF members must also be trustees of the fund or, if the fund has a corporate trustee, they must all be company directors of the corporate trustee. Special rules apply in relation to these trustee requirements where an SMSF has only one member.