Internal auditing is a profession and activity involved in advising organizations regarding how to better achieve their objectives. Internal auditing involves the utilization of a systematic methodology for analyzing business processes or organizational problems and recommending solutions.

Professionals called internal auditors are employed by organizations to perform the internal auditing activity. The scope of internal auditing within an organization is broad and may involve internal control topics such as the efficacy of operations, the reliability of financial reporting, deterring and investigating fraud, safeguarding assets, and compliance with laws and regulations.