The mission of the Internal Audit and Investigations Department (IAID) is to provide government with a centralised, functionally independent and professionally competent appraisal, consulting and investigative function established within Government to examine, evaluate, inspect, scrutinize and recommend on government activities as a service to Government itself.

The primary objective of the IAID is to assist Permanent Secretaries in the effective discharge of their duties. IAID furnishes Permanent Secretaries with analyses, recommendations, counsel and information concerning activities reviewed and/or investigated.

The IAID is independent of the activities it audits to ensure objective judgement essential to its proper conduct and impartial advice to Government. No member of the IAID shall have authority over, or responsibility for, any of the activities reviewed. The involvement of the Department in developing or implementing departmental policies, systems and procedures shall be in an advisory capacity, in adherence to any past and/or present recommendations made by the IAID itself.