The Role of Internal and External Auditors in Nigerian Public Organization

CHAPTER ONE

INTRODUCTION

1.1 Background to the Study

The Nigerian Standard on Auditing (NSA), issued by the Institute of Chartered Accountants of Nigeria (ICAN), includes a section titled Considering the Work of Internal Audit. This standard aligns with the International Standard on Auditing (ISA) developed by the International Auditing and Assurance Standards Board (IAASB). Both standards aim to improve the quality of external audits by ensuring that auditors collect sufficient and reliable evidence. NSA 26 specifically directs external auditors to assess the extent to which they can rely on internal auditors’ work. This assessment plays a central role in audit planning and decision-making (Munro and Stewart, 2011).

External auditors often decide their level of reliance based on the competence and independence of the internal auditors. When internal auditors display strong professionalism and objectivity, external auditors can confidently depend on their findings. However, if internal auditors lack credibility or expertise, external auditors must conduct additional verification to ensure accuracy.

In the public sector, effective audit practices strengthen governance, promote transparency, and safeguard public funds. Internal and external audits help detect mismanagement, enhance accountability, and prevent corruption. The Institute of Internal Auditors (IIA, 2012) noted a decline in the perceived effectiveness of audit functions within public institutions and emphasized the need for stronger frameworks to improve collaboration between internal and external auditors.

Despite these observations, some scholars hold different views. Ridley and Silva (2007) argued that audits in the private sector often suffer from weak practices, while Albrecht et al. (1992) maintained that public sector governance offers a better foundation for effective auditing. The 2007 Northern Rock crisis in the United Kingdom, where the bank received an unqualified audit report before being nationalized in 2008, raised global concerns about audit reliability in both sectors.

Reports by the Financial Reporting Council (2004) and HM Treasury (2002) stressed that strong internal and external audit functions are essential for economic growth and stability. The Nigerian economy, which depends heavily on oil revenue, needs transparent governance systems to manage resources efficiently (Index Mundi, 2014). Adorno (1979) also emphasized that governments can only benefit from high-revenue sectors when they maintain effective audit systems. Therefore, this study examines how internal and external auditors contribute to accountability and transparency in Nigerian public organizations.

1.2 Statement of the Problem

Many public organizations in Nigeria, especially ministries of finance, face weak internal controls and poor compliance with financial management standards. These issues result from inadequate managerial competence, limited education, and low commitment to ethical practices. Often, organizational structures lack clarity, and overlapping duties make audits difficult to execute.

Although internal audit departments exist in most public institutions, cases of fraud and financial irregularities remain high. Some observers believe internal auditors worsen the situation instead of resolving it. Others view them as instruments for internal conflicts rather than accountability.

Several factors contribute to these problems, including insufficient staffing, lack of qualified auditors, and poor segregation of duties. In many instances, authorities fail to implement audit recommendations, reducing the overall effectiveness of internal and external audits. Consequently, these weaknesses lead to financial losses, inefficiencies, and poor service delivery in the Nigerian public sector.

1.3 Objectives of the Study

The main objective of this study is to examine the roles of internal and external auditors in Nigerian public organizations. The specific objectives are to:

1. Assess the relationship between internal and external auditors in public organizations.

2. Identify how internal auditors promote accountability in public organizations.

3. Determine how external auditors contribute to transparency and governance in public organizations.

1.4 Research Questions

This study addresses the following research questions:

1. What relationship exists between internal and external auditors in public organizations?

2. How do internal auditors promote accountability?

3. How do external auditors enhance transparency and governance?

1.5 Research Hypotheses

The following null hypotheses guide the study:

• H₁: No significant relationship exists between internal and external auditors in public organizations.

• H₂: Internal auditors do not play a significant role in Nigerian public organizations.

• H₃: External auditors do not play a significant role in Nigerian public organizations.

1.6 Significance of the Study

This study is significant to auditors, financial institutions, policymakers, and future researchers. It shows how effective auditing practices help detect and prevent fraud in Nigeria’s public sector. By linking strong auditing systems to organizational transparency, the study promotes accountability and good governance.

Public institutions can use the findings to strengthen internal controls and build trust among stakeholders. When financial reports are reliable, citizens develop more confidence in government operations. Policymakers can also use the results to design stronger anti-fraud regulations that safeguard public resources.

For auditors, the study provides practical insights into improving audit procedures and professional ethics. It encourages a proactive approach to identifying irregularities rather than focusing only on compliance. Moreover, it supports transparency in financial reporting, which fosters credibility and investor confidence. Future researchers can also use this study as a reference point for further studies on auditing and governance in developing economies. Overall, this research contributes to academic literature and ongoing reforms in Nigeria’s public financial management.

1.7 Scope of the Study

This study focuses on the roles of internal and external auditors in Nigerian public organizations. It limits its investigation to the Ministry of Finance in Oyo State, emphasizing how audit practices influence efficiency, transparency, and accountability in financial management.

1.8 Limitations of the Study

The study faces certain limitations, including restricted access to confidential data within the ministry. Some senior officers may withhold sensitive information, which could limit data availability. The researcher might also face challenges in obtaining specific documents classified as confidential. Despite these obstacles, adequate data will be gathered to ensure credible analysis and valid conclusions.

1.9 Definition of Terms

Fraud: Fraud refers to deliberate deception intended to secure unlawful financial gain.

Internal Audit: According to Millichamp (2002), internal auditing is an independent review function that evaluates an organization’s control systems and performance. It ensures the efficient and economical use of resources.

External Audit: External auditing involves an independent assessment of an organization’s financial statements by an auditor who does not belong to the organization. The goal is to offer an objective opinion on whether the financial records present a true and fair view of its financial position.