Internal controls represent a company's plan to: (1) encourage adherence to company policies, (2) promote operational efficiency, (3) minimize errors and theft, and (4) enhance the reliability and accuracy of accounting data.
The Sarbanes-Oxley Act requires a company whose shares are traded on the open market to document and assess its internal controls.Â
Auditors are required to test the design and operating effectiveness of their clients' internal controls (example).
There is an organization called the Committee of Sponsoring Organizations (COSO) that provides a framework for designing an internal control system.