SOX Control Testing Requirements
Understanding Sarbanes-Oxley Section 404 requirements for internal control over financial reporting testing.
SOX Section 404 Control Testing
Overview
Section 404 of the Sarbanes-Oxley Act requires management to assess and report on the effectiveness of internal control over financial reporting (ICFR).
Key Requirements
Management Assessment (404a)
- Annual assessment of ICFR effectiveness
- Written report included in annual report
- Statement of management's responsibility
- Framework used (typically COSO)
- Disclosure of material weaknesses
Auditor Attestation (404b)
- External auditor opinion on ICFR
- Required for accelerated filers
- Integrated with financial audit
- Follows PCAOB standards
Scoping Process
Top-Down Risk Assessment
- Start with financial statements
- Identify significant accounts
- Determine relevant assertions
- Identify significant processes
- Evaluate fraud risk
Significance Thresholds
- Financial statement line items
- Materiality considerations
- Qualitative factors
- Fraud risk
Control Identification
Entity-Level Controls (ELCs)
- Control environment
- Risk assessment
- Information and communication
- Monitoring activities
Types of ELCs:
- Direct: Precise enough to prevent/detect misstatements
- Indirect: Important but need other controls
Process-Level Controls (PLCs)
- Transaction processing
- Account reconciliations
- Management review
IT General Controls (ITGCs)
- Access security
- Change management
- Computer operations
- Program development
Testing Approach
Design Effectiveness
- Walkthroughs required
- One transaction end-to-end
- Evaluate control design
Operating Effectiveness
- Test over entire period
- Sample transactions
- Evidence of performance
Sample Sizes (PCAOB guidance)
| Control Type | Low Risk | Higher Risk | |--------------|----------|-------------| | Annual | 1 | 1 | | Quarterly | 1 | 2 | | Monthly | 2 | 4 | | Weekly | 5 | 10 | | Daily | 15 | 25 |
Documentation Requirements
- Risk and control matrices
- Process narratives/flowcharts
- Test plans and results
- Issue management
- Management representations
Deficiency Evaluation
Severity Assessment
- Likelihood of misstatement
- Magnitude if occurs
- Compensating controls
Classification
- Deficiency → Document
- Significant deficiency → Report to audit committee
- Material weakness → Disclose publicly