SOX Compliance: What Internal Auditors Need to Do Now

The Sarbanes-Oxley Act (SOX), enacted over two decades ago, remains a cornerstone of corporate governance, ensuring the accuracy and reliability of financial reporting for publicly traded companies. While its principles are well-established, the SOX compliance landscape is anything but static. As internal auditors, our role is more critical than ever, not just in checking boxes, but in truly understanding and assuring the integrity of our organizations' financial data in an increasingly complex and technologically driven world.

Moving Beyond Static Compliance

For internal auditors focused on SOX compliance, the most important thing is to move beyond a static, once-a-year approach to embrace continuous vigilance, leverage technology, and deeply understand the evolving risks to financial data. This means focusing on proactive risk identification, robust control testing, efficient documentation, and a strong partnership with management and external auditors.

The Core Mandate: Why SOX Still Matters

At its heart, SOX aims to protect investors by ensuring that financial information disclosed by public companies is accurate, transparent, and free from material misstatement. Sections 302 and 404 are particularly relevant for internal audit. Section 302 requires CEO and CFO certification of financial reports and the effectiveness of internal controls, while Section 404 mandates management to establish and assess the effectiveness of internal controls over financial reporting (ICFR), with external auditors providing an attestation on that assessment.

In 2025, the emphasis has shifted towards continuous control over data, not just point-in-time checks. Regulators and external auditors expect organizations to demonstrate ongoing assurance that financial data is accurate, complete, and trustworthy across all systems and processes, including those influenced by new technologies like AI or operating in hybrid work environments.

What Internal Auditors Need to Undertake and Follow

1. Re-evaluate and Refine Your Risk Assessment

The foundation of any effective SOX program is a thorough and dynamic risk assessment. This isn't a one-time exercise; it's an ongoing process.

• Identify Materiality: Work closely with finance to understand what truly matters. What accounts, transactions, and disclosures are "material" – meaning they could influence the economic decisions of financial statement users? This helps narrow your focus to the most critical areas.
• Map Processes and Data Flows: Go beyond simple process narratives. Understand the end-to-end data lineage for key financial processes (e.g., order-to-cash, procure-to-pay, hire-to-retire). Where does data originate? How does it flow through various systems (ERPs, CRMs, specialized financial applications)? Where are the critical intersections and potential points of failure or manipulation?
• Conduct a Robust Fraud Risk Assessment: This should be integrated into your overall risk assessment. Think about common fraud schemes (e.g., revenue recognition fraud, expense manipulation, asset misappropriation) and how they could occur within your specific processes. Consider the human element and potential for collusion.
• Assess Emerging Technology Risks: As organizations adopt AI, cloud computing, robotic process automation (RPA), and other advanced technologies, new risks to financial data integrity emerge. How are these technologies designed, implemented, and controlled to prevent errors or manipulation of financial information? Internal audit must understand the inherent risks of these new tools.

2. Identify and Document Key Controls (and Their Underlying Information)

Once risks are identified, the next step is to pinpoint the controls designed to mitigate them.

• Focus on Key Controls: Not every control is SOX-relevant. Concentrate on "key controls" – those that, if they fail, could lead to a material misstatement in the financial statements. These are the controls that directly address significant risks.
• Document Control Design: For each key control, clearly document its purpose, who performs it, how often, what evidence is generated, and what specific risk it addresses. This documentation should be clear, concise, and easy for anyone (including external auditors) to understand.
• Understand Information Used in Controls (IUC) / Information Produced by Entity (IPE): A critical aspect often overlooked is the information that controls rely on (IUC) or that processes produce (IPE). Auditors need to ensure this information is accurate, complete, and reliable. This involves testing the source data, calculations, and reports. For instance, if a control relies on a spreadsheet, how is that spreadsheet's integrity maintained? If a system-generated report is used, are the underlying system configurations and data integrity reliable?

3. Develop and Execute a Comprehensive Testing Strategy

Testing controls is where internal audit provides assurance. Your testing approach should be systematic and evidence-based.

• Walkthroughs: Start with walkthroughs to confirm your understanding of the process and controls. This involves tracing a transaction from initiation to financial statement impact, observing control performance, and asking process owners questions. This helps identify design gaps early.
• Interim and Year-End Testing: Plan your testing throughout the year. Interim testing allows for early identification of deficiencies and provides time for remediation before year-end. Year-end testing confirms ongoing operating effectiveness.
• Design Effectiveness vs. Operating Effectiveness:
  • Design Effectiveness: Does the control, if performed as prescribed, effectively prevent or detect a material misstatement?
  • Operating Effectiveness: Is the control actually being performed as designed, and by the right people, consistently throughout the period?
• Sampling Methodology: For controls performed frequently, use appropriate statistical or judgmental sampling techniques. Ensure your sample size is sufficient to draw conclusions about the population.
• Leverage Technology for Continuous Monitoring/Auditing: This is a major area of evolution. Instead of manual sampling, use data analytics tools, such as Supervizor, to:
  • Test 100% of the population: For certain automated controls or data points, this is now feasible.
  • Identify anomalies: Detect unusual transactions or control deviations in real-time or near real-time.
  • Automate evidence collection: Integrate with systems to automatically pull relevant data and logs.

  This moves SOX compliance from periodic checks to a more dynamic, "always-on" assurance model.

4. Manage and Remediate Deficiencies Promptly

Finding deficiencies is not a failure; it's an opportunity for improve business processes.

• Clearly Document Deficiencies: Describe the deficiency, its root cause, the impacted controls, and the potential financial statement impact. Classify deficiencies (e.g., control deviation, significant deficiency, material weakness).
• Collaborate on Remediation Plans: Work with management to develop clear, actionable remediation plans with assigned responsibilities and timelines.
• Monitor and Retest: Follow up on remediation efforts. Once management implements changes, retest the controls to confirm that the deficiency has been effectively resolved and the control is now operating as intended.
• Communicate Effectively: Keep management, the Audit Committee, and external auditors informed about identified deficiencies and remediation progress. Transparency is key.

Best Practices for Internal Auditors in SOX Compliance

• Adopt a Risk-Based Approach: Don't treat all controls equally. Focus your efforts on the highest-risk areas that could lead to a material financial misstatement. This ensures your resources are deployed efficiently and effectively.
• Foster a Strong Partnership with Management: Internal audit is there to support management in achieving their SOX compliance objectives, not just to find fault. Collaborate, educate, and offer solutions. A strong relationship facilitates smoother information flow and more effective remediation.
• Maintain Independence and Objectivity: While partnering with management, internal audit must always maintain its independence. Your assessments and findings should be unbiased and evidence-based.
• Embrace Technology and Automation:
  • GRC (Governance, Risk, and Compliance) Tools: Utilize GRC software to centralize your risk and control library, document processes, track testing, manage deficiencies, and generate reports. This improves efficiency and consistency.
  • Data Analytics and AI: Invest in tools and training for data analytics, including financial risk discovery platforms. Explore how AI can automate control testing, identify anomalies, and provide continuous insights into your control environment. This shifts audit from sampling to a more comprehensive review of populations.
  • Continuous Control Monitoring (CCM): Work towards implementing CCM where possible. This involves setting up automated rules to monitor controls and transactions in real-time, alerting you to potential issues immediately.
• Stay Current with Regulatory Changes and Industry Trends: The PCAOB (Public Company Accounting Oversight Board) continuously issues guidance and inspection observations. Stay informed about these, as well as emerging risks like cybersecurity threats, privacy regulations (e.g., GDPR, CCPA), and ESG reporting requirements that can impact financial data.
• Invest in Your Team's Skills: SOX auditing today requires a blend of accounting, finance, IT, and data analytics skills. Provide ongoing training for your team to keep them abreast of new technologies, risks, and audit methodologies.
• Align with External Auditors: Regular communication with external auditors is crucial. Share your risk assessment, audit plan, testing results, and deficiency remediation progress. This collaboration can streamline their audit and reduce duplication of effort. External auditors often rely on the work of internal audit, provided it meets their quality standards.
• Focus on Root Cause Analysis: When a control fails, don't just identify the symptom. Dig deeper to understand why it failed. Was it a design flaw, a lack of training, insufficient resources, or a breakdown in oversight? Addressing the root cause prevents recurrence.

SOX compliance is a journey of continuous improvement, not a destination. For internal auditors, the most important aspects are proactive risk management, rigorous and tech-enabled control testing, transparent communication, and an unwavering commitment to data integrity. By embracing best practices and adapting to the evolving landscape of technology and risk, internal audit can provide invaluable assurance to management, the board, and ultimately, to investors.