Internal Audit Methodologies: Episode 11, Matrix of Assertions & Internal Controls, Example: HR Information Systems (HRIS)

HR Information Systems (HRIS) are critical for maintaining accurate, secure, and accessible employee data. These systems support HR functions such as payroll, benefits, recruitment, and reporting. Internal auditors must assess the controls embedded within HRIS processes to ensure data integrity, proper access, and regulatory compliance. The matrix of assertions and internal controls provides a structured method to evaluate system reliability and control adequacy.

Elements of HRIS

  • Employee Data Management – Maintaining accurate, up-to-date personnel records.

  • HR Software Tools – Managing payroll, benefits, leave, and compliance.

  • Reporting and Analytics – Generating workforce metrics and compliance reports.


Assertions and Internal Controls Matrix – HRIS Example

Assertion Potential Misstatement Example of Internal Control Relevant Questions / Audit Tests
Occurrence Records exist without actual employees (ghost employees) Biometric or ID badge access tied to HRIS system Are all active employee records linked to valid employment records?
Completeness Missing employee records or incomplete updates Automated reminders for document uploads or contract expirations Is all required employee information captured and updated timely?
Authorization Unauthorized changes to personnel or payroll data Role-based access and approval workflows Are all changes to HR records approved by authorized personnel?
Accuracy Incorrect employee data or pay rates Reconciliation between payroll records and employment contracts Are HRIS records consistent with physical or legal documents?
Cutoff Delays in updating terminations or onboarding Real-time updates and batch sync with system logs Are employment status changes reflected in HRIS without delay?
Classification Misclassification of roles affecting benefits or tax reporting Defined role codes and benefits mapping in the system Are employee classifications correctly recorded for reporting purposes?

Practical Example:

An audit at a logistics firm uncovered that terminated employees were still active in the HRIS system, resulting in payroll errors—a breach of cutoff and occurrence assertions. The firm had no automatic deactivation linked to termination status. The auditor recommended integrating termination processing with real-time HRIS updates and introducing automated alerts.

Through a well-structured assertion-based review, auditors help ensure that HRIS functions are secure, accurate, and aligned with HR and organizational policies.