How the internal audit contributes to effective corporate governance

Effective corporate governance is crucial for building and maintaining stakeholder trust within an organization. It encompasses a framework of principles, policies and processes that guide how a company operates ethically, transparently and accountably.

Within this framework, internal audits play a vital role in ensuring that governance practices are sound and deficiencies are identified and addressed. The Institute of Internal Auditors' (IIA) 2025 Pulse Report reveals that 73% of organizations now outsource internal auditing, while only 27% operate without any outsourced audit services — showing how specialized risks are driving organizations to seek external expertise for complex audit areas.

This guide covers everything organizations need to know about optimizing internal audits for corporate governance:

• How internal audits support core governance objectives through risk management, compliance oversight, and control evaluation
• Key characteristics of effective internal audit functions that drive sustainable outcomes
• The critical role internal audit plays in fostering ethical culture and organizational integrity
• Best practices for internal audit collaboration with boards and audit committees
• Current trends shaping internal audit evolution, including AI governance, continuous monitoring, and ESG assurance
• How AI-powered audit management platforms transform internal audit effectiveness

How internal audits contribute to governance objectives

An internal audit acts as an independent and objective evaluator within an organization. It provides assurance to the board of directors and senior management on the effectiveness of various elements that are crucial for good governance, including:

1. Risk management assurance

Internal audits assess organizational risk management frameworks, identifying potential threats and evaluating control adequacy for mitigation strategies. For mid-market and enterprise companies managing complex risk environments, this systematic approach provides essential efficiency in resource allocation and strategic decision-making.

Cybersecurity has emerged as a dominant governance priority, with most audit committees now identifying it among their top concerns. Internal audit functions must now provide specialized assurance on emerging risks, including AI governance, data privacy, geopolitical threats, and third-party vendor management.

This proactive risk identification provides essential support for strategic decision-making and helps organizations allocate resources effectively across their most critical threat areas.

2. Internal controls evaluation

Internal audits evaluate the design and operating effectiveness of internal controls across financial reporting, operational activities, and compliance processes. This evaluation ensures accuracy and reliability of information while safeguarding against fraud, errors, and operational failures that could impact stakeholder confidence.

3. Regulatory compliance oversight

With the SEC designating AI as a disclosure priority and requiring company-specific risk disclosures, internal audit assists in verifying adherence to evolving regulatory requirements across multiple jurisdictions. This includes compliance monitoring for Sarbanes-Oxley requirements, GDPR data protection, climate disclosure mandates, and emerging AI governance frameworks.

4. Governance processes

Internal audit reviews the design and effectiveness of governance processes, including board composition, board procedures and communication channels. This ensures transparency and accountability within the organization's leadership structure.

Key characteristics of effective internal audit functions

An internal audit function that supports good governance possesses several key characteristics that align with the IIA's 2024 Global Internal Audit Standards:

• Independence and objectivity: Internal audits must remain free from management influence while maintaining dual reporting relationships — administratively to senior management for daily operations and functionally to the audit committee for governance oversight. This structural independence enables objective assessments and unbiased reporting.
• Competence: Internal audit professionals require relevant certifications (CIA, CPA, CPA-IT, or similar) plus extensive risk management experience. The new IIA standards emphasize enhanced professional skepticism and continuing professional development to address evolving business complexities.
• Integrity: Internal audit teams must uphold the highest ethical standards and maintain professional integrity in all aspects of their work.
• Proactive approach: Forward-thinking internal audit functions anticipate emerging risks and proactively adjust focus areas to address them. This includes developing capabilities in AI auditing, ESG assurance, cybersecurity risk assessment, and third-party vendor oversight.
• Effective communication: The internal audit team should maintain clear and transparent communication channels with the board, management and other stakeholders, keeping them informed of audit findings, recommendations and action plans.

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Internal auditing's role in fostering an ethical culture in an organization

A strong ethical culture is central to good governance, fostering trust, transparency and responsible decision-making. Internal audits promote organizational integrity through several key mechanisms:

• Identifying and reporting potential ethical breaches: Internal audit activities can uncover instances of unethical behavior, such as conflicts of interest, accounting fraud or employee misconduct. Prompt reporting of such findings allows the organization to take corrective action and address systemic issues.
• Promoting ethical awareness: Internal audit can raise awareness about ethical considerations throughout the organization by conducting training programs, communicating company policies and procedures, and promoting ethical decision-making through workshops and communication channels.
• Assessing the effectiveness of the ethics and compliance program: Internal audits can evaluate the adequacy of the organization's ethics and compliance program, identify areas for improvement, and ensure its effectiveness in promoting ethical conduct.
• Assessing tone at the top: Internal audits evaluate whether leadership's actions align with stated organizational values. They observe management behavior, review decision-making processes, and assess whether executives demonstrate the ethical standards they expect from employees. This "tone at the top" assessment helps boards understand cultural risks that could impact the entire organization.

How can internal audit teams collaborate with the board of directors to enhance corporate governance?

Effective collaboration between internal auditors and the board is critical for optimizing the internal audit function's contribution to good governance. For internal audit functions managing complex risk environments, this collaboration becomes essential for establishing robust governance frameworks required by stakeholders. This collaboration can be facilitated through:

1. Establishing regular communication protocols

Timely communication between internal audit teams and boards enables directors to stay informed of key findings, risk assessments, and emerging compliance issues. This includes quarterly reporting cycles plus immediate escalation for critical matters requiring board attention.

2. Conducting private executive sessions

Internal audit committees should meet regularly with the board in executive sessions — without management present. These private discussions allow for frank conversations about management performance, cultural concerns, and sensitive issues that might not surface in regular meetings.

3. Providing board education on emerging risks

Internal audits help keep board members current on evolving threats and regulatory changes that affect the organization. This includes briefings on new cybersecurity risks, regulatory updates, industry-specific threats, and best practices from other organizations that directors can apply to governance oversight.

4. Ensuring direct board access

Direct internal audit access to the board without management intervention ensures independent reporting and facilitates transparent communication about governance matters, control deficiencies, and organizational culture issues.

5. Aligning with board priorities

Internal audits should tailor audit plans and activities to address specific board priorities and concerns regarding risk management, governance effectiveness, and regulatory compliance.

How is the role of the internal audit evolving in the current business environment?

Internal audits continue evolving alongside changing business environments and regulatory requirements. Recent regulatory developments are driving specific changes in the internal audit’s focus and capabilities:

Adapting to shifting regulations

Internal audit functions must quickly adapt as regulatory requirements change. For example, Corporate Transparency Act requirements were suspended for U.S. domestic companies in March 2025, reducing compliance burdens but requiring internal audit teams to rapidly adjust their monitoring programs. These constant regulatory shifts — both adding and removing requirements — demand agility from internal audit functions.

Enhanced audit evidence standards

The Public Company Accounting Oversight Board’s amended auditing standards emphasize internal controls over technology and electronic evidence reliability. Internal audit must assess how organizations and external auditors adapt to new expectations for digital audit evidence, documentation standards, and evidence validation as more processes move to electronic systems.

AI governance and disclosure oversight

Rising regulatory expectations for AI-related risk disclosures in 10-K filings mean internal audit must ensure accurate, complete AI risk reporting. This includes assessing governance over AI systems, evaluating related controls, and managing risks like "AI washing," data integrity issues, and third-party AI exposures.

Embracing continuous monitoring and real-time analytics

Internal audits are shifting from periodic, sample-based testing to continuous, comprehensive data analysis. Modern audit teams now use automated tools that analyze 100% of transactions rather than statistical samples, enabling them to detect anomalies and control failures immediately rather than months after they occur.

This evolution requires internal auditors to develop new technical skills in data analytics, understand automated testing tools, and redesign audit programs around continuous assurance rather than point-in-time reviews.

Expanding into ESG assurance and sustainability reporting

Internal audit roles are broadening beyond financial and operational risks to include environmental, social, and governance measurements. With EU sustainability reporting mandates, internal audit teams must now verify carbon emissions calculations, assess supply chain sustainability claims, and provide assurance over ESG data quality.

This expansion requires auditors to understand new measurement standards, develop expertise in sustainability metrics, and coordinate with environmental teams — skills that weren't traditionally part of internal audit competencies.

How AI technology transforms internal audit effectiveness

Internal audit functions face mounting pressure to provide strategic insights while managing expanding risk portfolios and shrinking timeframes. Traditional manual processes can't keep pace with the volume of data, regulatory complexity, and board expectations for real-time risk intelligence.

This operational reality requires technology infrastructure that can transform raw data into actionable audit insights while maintaining comprehensive coverage across complex organizational structures. To achieve this goal, best-in-class governance tools like Diligent provide:

Smart risk scanning and continuous monitoring

Diligent's enterprise risk management solution continuously identifies compliance risks across regulatory frameworks, providing real-time alerts for emerging threats requiring immediate audit attention. This proactive approach enables internal audit teams to address potential issues before they develop into significant governance problems or regulatory violations.

Advanced analytics and comprehensive data coverage

Diligent’s ACL Analytics transforms audit data analysis with advanced pattern recognition and anomaly detection capabilities that analyze 100% of transactional data rather than traditional sampling methods. This coverage enables internal audit teams to identify control failures, fraud indicators, and process inefficiencies with greater accuracy and speed.

Intelligent audit preparation and reporting

Diligent Audit Management provides smart audit planning capabilities that optimize resource allocation based on risk assessments, regulatory priorities, and business objectives. Automated documentation and reporting capabilities ensure audit findings translate into actionable recommendations for management and board oversight.

Diligent integrates these AI capabilities with audit management, automated compliance tracking, and real-time reporting that support both regulatory requirements and strategic decision-making.

Internal audit: A cornerstone for sustainable governance

Internal audits serve as the critical bridge between board oversight and operational reality, providing independent assurance that governance actually works in practice. Effective internal audit functions don't just find problems — they prevent governance failures that can destroy stakeholder confidence and business value.

The most successful organizations are moving beyond traditional audit approaches to AI-powered continuous monitoring that identifies risks before they become crises. Smart audit management delivers comprehensive data coverage, automated compliance tracking, and real-time risk intelligence that transforms internal audit from a compliance function into a strategic business advantage.

Ready to see how AI transforms internal audit effectiveness? Schedule a demo to discover how Diligent's solutions can strengthen your governance infrastructure and deliver measurable business impact.

FAQs about how internal audit enhances corporate governance

How often should the internal audit function report to the board?

Internal auditing should provide regular updates to the board, typically quarterly, with immediate reporting for critical issues. The IIA's 2024 Global Standards emphasize continuous communication rather than just formal reporting cycles.

What's the difference between internal audit and external audit in governance?

Internal audits provide ongoing assurance and advisory services to management and the board, while external audit focuses on annual financial statement attestation. Internal audit has a broader scope, including operational effectiveness and risk management.

How do organizations measure internal audit effectiveness?

Key metrics include audit plan completion rates, management acceptance of recommendations, and stakeholder satisfaction scores. Organizations also measure the function's ability to identify emerging risks before they impact operations.

Should internal audit teams report to the CEO or the audit committee?

Best practice requires dual reporting — administratively to senior management for daily operations, while maintaining functional reporting to the audit committee. This structure preserves independence and objectivity.

What qualifications should a chief audit executive have?

CAEs should possess relevant professional certifications (CIA, CPA, or similar) and extensive risk management experience. They must demonstrate leadership capabilities to effectively communicate with boards and senior management.

Schedule a demo to discover how Diligent can transform your internal audit effectiveness today.