Membership runs in calendar years and is available in several categories:

Fellow (FIBS)
Fellowship of the Institute may be awarded at the discretion of the Executive Committee following nominations from members (including existing Fellows). To qualify, a person must be "(operationally) outstanding in their area and/or have performed a long, honourable and highly regarded service to the IBS and/or to Broadcasting". Current Fellows of the Institute

Full Member (MIBS)
In a fragmenting industry, the Institute's rigorous criteria for full membership are becoming increasingly valuable as a seal of competence and professionalism. To qualify for Full membership, applicants have to show that they hold, or have held, a position with full responsibility for the sound output for broadcast productions, including planning and post-production work where appropriate.

Associate (AMIBS) and Student Membership
Open to all sound staff with current experience in broadcasting. At least five years broadcast experience is required for Associate membership. Those with less experience are encouraged to join as Student members and benefit form the training aspects of the Institute.

Affiliate (AIBS) and Student Affiliate
These are special categories open to those who would not otherwise be eligible for membership. An Affiliate will typically be engaged at a senior level in manufacturing, research or training, or in some other activity closely connected with broadcasting.

The category of Student Affiliate is available to those undergoing full or part time education whose studies, activities or interests are closely associated with broadcasting.