Testing Internal Control

How do auditors test internal controls? This auditing lecture explains the process of testing internal controls for accounting students and CPA Exam candidates, covering when auditors test controls, the four main testing procedures, and how the results affect substantive testing. A core topic for the AUD section of the CPA Exam. Try it free at farhatlectures.com — interactive exercises, lectures, simulations, cases, multiple choice, and AI tools for CPA, CMA, EA and students. Video Timeline & Key Concepts: 0:00 — Introduction 0:06 — Understand and assess controls before deciding whether to rely on them 3:30 — The four main methods for testing controls 3:48 — Inquiries of client staff (least reliable on their own) 4:55 — Examination of documents for evidence controls were applied 5:40 — Observation of employees performing controls that leave no paper trail 7:15 — Re-performance: the auditor independently executes the control 8:08 — Extent of testing based on assessed risk, including interim testing 10:08 — Understanding vs. testing: same methods, but testing requires more evidence 12:21 — Linking control reliance to the scope of substantive testing Frequently Asked Questions: Why do auditors test internal controls? Auditors test controls to determine whether they operate effectively enough to rely on. If controls are effective and control risk is low, the auditor can reduce the amount of substantive testing needed to achieve an acceptably low audit risk. What are the four methods for testing controls? The four methods are inquiry of personnel, examination of documents, observation of the control being performed, and re-performance of the control by the auditor. Re-performance and observation generally provide stronger evidence than inquiry alone. Why is observation important for testing controls? Observation is essential for controls that leave no documentary trail, such as segregation of duties. By watching employees perform their tasks, the auditor gathers evidence that would not appear in the records. What is the difference between understanding and testing controls? The same procedures — inquiry, inspection, observation, and re-performance — are used both to understand the control system and to test its operating effectiveness. However, testing effectiveness requires more extensive evidence and broader sampling than gaining an understanding. How does testing controls affect substantive testing? The results of control testing determine how much the auditor can rely on the controls. Greater reliance reduces the extent of substantive procedures, while weak or ineffective controls require more substantive testing to keep overall audit risk low. #TestingInternalControls #InternalControl #AUD #Auditing #ControlRisk #ProfessorFarhat #accountingstudents #CPAexam #CMAexam #enrolledagentexam #accountingcourses #collegecourses #courses