Membership is open to Independent schools operating in South Australia. Most members are standalone schools, though a number of small systems and single-campus schools within a larger association also hold membership in their own right.

Applications are reviewed by the Board and take into account the school's registration status with the SA Department for Education and its standing with the relevant regulatory bodies.

Membership covers advocacy and representation to government, industrial relations advice, a full calendar of professional learning for teaching and non-teaching staff, and access to the member portal for policy templates, compliance guidance and event bookings.

Larger member benefits — enterprise bargaining support, WHS advice, and the school finder and MP finder tools — are bundled in rather than charged separately.

The PD calendar is built from a needs survey circulated to member schools each term, supplemented by legislative or curriculum changes that require sector-wide briefing. Sessions run both in person and online, and most carry a certificate for teachers' registration records.

Member schools can also request a tailored in-school session for whole-staff PD days, subject to facilitator availability.

Member schools have access to a dedicated IR and compliance advisory line during business hours. Requests are usually triaged within one business day, and complex matters are escalated to AISSA's external legal panel where needed.

The member portal also holds a library of current award summaries, template policies and compliance checklists that cover most day-to-day questions without needing to call.