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CHAPTER ONE
INTRODUCTION
1.1 Background of the Study
Taxation is one of the oldest and most important instruments used by governments to generate revenue for public expenditure and economic development. In modern economies, taxes remain a central pillar of fiscal policy and a key driver of national development. In countries such as Nigeria, taxation is especially critical because it supports government spending on infrastructure, education, healthcare, and security (Ola, 2017).
Over the years, tax revenue has been recognized as a more stable and sustainable source of income compared to oil revenue and external borrowing. However, in many developing economies, including Nigeria, the efficiency of tax systems is often weakened by compliance challenges such as tax evasion and avoidance (Appah and Eze, 2013).
Tax evasion is the illegal act of deliberately refusing to pay taxes or underreporting taxable income to reduce tax liability. It undermines government revenue generation and distorts economic planning. When taxpayers evade taxes, the government loses funds needed for development projects and public services (Aguolu, 2015).
In Nigeria, state governments depend heavily on internally generated revenue (IGR) to complement federal allocations. One of the major sources of IGR is taxation administered by agencies such as the Enugu State Board of Internal Revenue. Despite this, many states still struggle with low revenue performance due to widespread tax evasion.
The importance of taxation cannot be overstated because it provides the financial base for government operations. Without adequate tax revenue, governments are unable to provide basic infrastructure such as roads, electricity, water supply, and healthcare services (James and Alley, 2014).
Tax evasion has become a major obstacle to revenue generation in developing countries. It occurs in both formal and informal sectors of the economy and is often facilitated by weak enforcement systems, corruption, and lack of taxpayer education (Ojo, 2018).
In Enugu State, tax evasion has continued to affect the efficiency of revenue collection. Many individuals and corporate bodies fail to declare their actual income, while others completely avoid tax registration. This results in significant revenue losses to the state government. The problem of tax evasion is further worsened by poor record keeping among businesses and inadequate data management systems within tax authorities. These weaknesses make it difficult for tax administrators to accurately assess taxable income and enforce compliance (Aguolu, 2015).
Another major issue is low tax morale among citizens. Many taxpayers feel that government does not adequately utilize tax revenue for public benefit. This perception discourages voluntary compliance and increases the tendency to evade taxes (Ola, 2017).
Corruption and lack of transparency in public expenditure also contribute to tax evasion. When taxpayers believe that public funds are mismanaged, their willingness to comply with tax obligations reduces significantly (Appah and Eze, 2013).
The informal sector in Nigeria also poses a major challenge to tax administration. A large portion of economic activities operate outside the tax net, making it difficult for tax authorities to capture potential revenue (James and Alley, 2014).
Technological limitations further compound the problem. Inadequate use of digital tax systems, poor automation, and lack of integrated taxpayer databases reduce the efficiency of tax collection processes in Enugu State. Efforts have been made by the Enugu State Board of Internal Revenue to improve compliance through enforcement, taxpayer education, and reforms, but tax evasion continues to persist. This suggests that existing strategies may not be fully effective (Appah and Eze, 2013).
The consequences of tax evasion are severe. Reduced government revenue leads to poor infrastructure development, unemployment, inadequate social services, and increased dependence on federal allocations and borrowing. Tax evasion also creates inequality in the tax system because compliant taxpayers bear a heavier burden while evaders benefit unfairly. This discourages voluntary compliance and weakens trust in the tax system (Ola, 2017).
Furthermore, persistent tax evasion affects economic planning because government budgets are based on projected revenue. When actual revenue falls short, planned development projects may be delayed or abandoned. The issue of tax evasion also affects investor confidence. Poor tax systems and weak enforcement create an unstable fiscal environment that may discourage investment and economic growth (Ola, 2017).
Given the importance of taxation to development, understanding the causes and effects of tax evasion is essential for improving revenue generation strategies in Enugu State. It is therefore necessary to examine the underlying factors responsible for tax evasion and how they affect the revenue performance of Enugu State Government. This study is therefore undertaken to critically analyze tax evasion, its causes, and its implications on the revenue generation capacity of Enugu State Government with reference to the Enugu State Board of Internal Revenue (James and Alley, 2014).
1.2 Statement of the Problem
Despite the importance of taxation as a major source of government revenue, Enugu State continues to experience low internally generated revenue due to widespread tax evasion. This has created a major fiscal challenge for the state government in financing development projects. Tax evasion has become a persistent issue in the Nigerian tax system, particularly at the state level where enforcement capacity is often weak. In Enugu State, many taxable individuals and businesses deliberately avoid paying taxes or underreport their income.
One major problem is the inability of tax authorities to fully capture taxpayers within the tax net. Many businesses operate informally without proper registration, making it difficult for the Enugu State Board of Internal Revenue to assess and collect taxes effectively. Another issue is the deliberate falsification of financial records by taxpayers. Many individuals and corporate organizations understate their income to reduce tax liabilities, thereby reducing government revenue.
Weak enforcement of tax laws also contributes significantly to tax evasion. Penalties for non-compliance are often not strictly enforced, allowing offenders to continue evading taxes without serious consequences. Inadequate manpower and limited technical capacity within tax authorities further worsen the problem. Tax officials may lack the resources needed to effectively monitor, audit, and enforce tax compliance across all sectors.
Corruption within tax administration systems also reduces efficiency. In some cases, tax officials may collude with taxpayers to reduce tax liabilities illegally, leading to revenue leakage. Low public trust in government is another major problem. Many taxpayers believe that tax revenue is not properly utilized for public benefit, which discourages voluntary compliance. This perception of poor accountability reduces taxpayers’ willingness to fulfill their obligations, thereby increasing tax evasion levels in the state.
Another problem is the dominance of the informal sector, which is difficult to regulate and tax. Many small businesses and self-employed individuals operate outside the formal tax system. Lack of proper taxpayer education and awareness also contributes to tax evasion. Many taxpayers are not fully informed about their tax obligations or the consequences of non-compliance. Technological inefficiency in tax administration systems also limits effective revenue collection. Manual processes and poor data integration make it easier for taxpayers to evade detection.
Economic hardship among citizens is another contributing factor. Many individuals and businesses evade taxes due to financial constraints and inability to meet tax obligations. The combined effect of these problems is a significant reduction in internally generated revenue in Enugu State. This limits the government’s ability to provide essential services such as infrastructure, education, healthcare, and security.
Persistent tax evasion also creates inequality in the tax system, where compliant taxpayers bear a disproportionate burden while evaders benefit unfairly. This situation undermines public confidence in the tax system and discourages future compliance among honest taxpayers. The inability of the state government to effectively address tax evasion raises concerns about the efficiency of existing tax policies and enforcement strategies.
Despite reforms introduced by the Enugu State Board of Internal Revenue, tax evasion continues to persist, suggesting that current measures are not sufficient. It is therefore necessary to critically investigate the causes of tax evasion and its impact on government revenue generation in Enugu State. This study seeks to fill this gap by providing empirical insights into the relationship between tax evasion and revenue performance in Enugu State Government.
1.3 Aim of the Study
The aim of this study is to examine tax evasion: causes and its implications on Enugu State Government revenue with particular reference to the Enugu State Board of Internal Revenue.
1.4 Objectives of the Study
The specific objectives of the study are to:
- Identify the causes of tax evasion in Enugu State.
- Examine the effect of tax evasion on internally generated revenue.
- Assess the effectiveness of tax enforcement mechanisms in reducing tax evasion.
- Determine the relationship between taxpayer compliance and government revenue.
- Propose measures to reduce tax evasion in Enugu State.
1.5 Research Questions
- What are the causes of tax evasion in Enugu State?
- How does tax evasion affect internally generated revenue?
- How effective are tax enforcement mechanisms in reducing tax evasion?
- What is the relationship between taxpayer compliance and government revenue?
- What measures can reduce tax evasion in Enugu State?
1.6 Research Hypotheses
Hypothesis One
H0₁: There is no significant relationship between tax evasion and government revenue in Enugu State.
H1₁: There is significant relationship between tax evasion and government revenue in Enugu State.
Hypothesis Two
H0₂: Tax evasion does not significantly affect internally generated revenue in Enugu State.
H1₂: Tax evasion significantly affects internally generated revenue in Enugu State.
Hypothesis Three
H0₃: Tax enforcement mechanisms do not significantly reduce tax evasion.
H1₃: Tax enforcement mechanisms significantly reduce tax evasion.
Hypothesis Four
H0₄: There is no significant relationship between taxpayer compliance and revenue generation.
H1₄: There is significant relationship between taxpayer compliance and revenue generation.
Hypothesis Five
H0₅: Taxpayer awareness does not significantly influence tax compliance.
H1₅: Taxpayer awareness significantly influences tax compliance.
1.7 Significance of the Study
This study will be beneficial to tax authorities such as the Enugu State Board of Internal Revenue by providing insights into the causes of tax evasion and strategies for improving tax compliance and revenue generation.
It will also assist government policymakers in designing effective tax reforms that will strengthen enforcement mechanisms and reduce revenue leakages.
Academically, the study will contribute to existing literature on taxation, public finance, and revenue generation, serving as a reference for students and researchers.
1.8 Scope of the Study
The study focuses on tax evasion: causes and its implications on Enugu State Government revenue. It is limited to the activities of the Enugu State Board of Internal Revenue and covers issues relating to taxpayer compliance, tax administration, and revenue generation.
1.9 Limitation of the Study
The study may be limited by factors such as difficulty in accessing accurate tax records, unwillingness of respondents to disclose sensitive financial information, time constraints, and financial limitations in carrying out extensive field research.
1.10 Definition of Terms
Taxation: A compulsory levy imposed by government on individuals and businesses to generate revenue.
Tax Evasion: Illegal act of deliberately avoiding tax payment through false declaration or non-disclosure of income.
Revenue: Income generated by government through taxes and other sources.
Tax Compliance: The degree to which taxpayers adhere to tax laws and regulations.
Internally Generated Revenue (IGR): Revenue generated by a state government from internal sources such as taxes, levies, and fees.
CHAPTER TWO
REVIEW OF RELATED LITERATURE
2.1 Conceptual Review
Taxation is a compulsory levy imposed by government on individuals and corporate organizations for the purpose of generating revenue to finance public expenditure. In developing economies such as Nigeria, taxation remains a major source of internally generated revenue, especially at the state level where agencies such as the Enugu State Board of Internal Revenue are responsible for tax administration.
Tax evasion is a deliberate and illegal act of refusing to pay tax or underreporting taxable income in order to reduce tax liability. It is considered a criminal offense because it deprives government of revenue needed for development (Aguolu, 2015).
Tax compliance refers to the willingness of taxpayers to obey tax laws, declare their true income, and pay taxes as at when due. High compliance leads to increased revenue generation, while low compliance results in revenue losses (James and Alley, 2014).
Government revenue refers to income generated by the state through taxes, levies, fines, and other sources. In Nigeria, tax revenue is a key component of internally generated revenue (IGR), which supports economic development and public service delivery (Ola, 2017).
The relationship between tax evasion and government revenue is inverse; as tax evasion increases, government revenue decreases, leading to poor infrastructure, weak public services, and economic stagnation (Appah and Eze, 2013).
Independent Variables (Causes of Tax Evasion):
- High tax rates
- Weak tax administration
- Corruption in tax system
- Low tax morale / poor civic responsibility
- Poor taxpayer education
- Dominance of informal sector
- Ineffective enforcement
Dependent Variable:
- Enugu State Government Revenue (IGR)
2.2 Causes of Tax Evasion
Several factors contribute to tax evasion in developing economies. One major cause is high tax rates, which discourage compliance and push individuals into illegal tax avoidance strategies.
Another cause is weak tax administration systems, including poor record keeping, lack of updated taxpayer databases, and inefficient monitoring systems. These weaknesses create loopholes exploited by taxpayers (Aguolu, 2015).
Corruption within tax institutions also encourages evasion. When taxpayers believe that tax officials are corrupt, they are less motivated to comply with tax obligations (Ojo, 2018).
Low tax morale is another major cause. Many taxpayers feel that government does not utilize tax revenue effectively, leading to reduced willingness to comply.
The dominance of the informal sector also contributes significantly to tax evasion in Nigeria, as many businesses operate outside formal regulatory frameworks.
2.3 Effects of Tax Evasion on Government Revenue
Tax evasion has serious negative effects on government revenue generation. It reduces the amount of funds available for public spending on infrastructure, education, healthcare, and security.
According to Appah and Eze (2013), persistent tax evasion weakens fiscal capacity and increases dependence on external borrowing and federal allocations.
Tax evasion also leads to inequality in the tax system, where compliant taxpayers carry a heavier burden while evaders benefit unfairly.
Furthermore, it affects economic planning because government budgets are based on projected revenue, which becomes unreliable when evasion is high.
2.4 Strategies for Reducing Tax Evasion
Governments adopt several strategies to reduce tax evasion. One key strategy is tax education and awareness campaigns to improve taxpayer knowledge and compliance.
Another strategy is strengthening enforcement mechanisms through audits, penalties, and legal sanctions against defaulters.
The use of digital tax systems and automation has also improved tax collection efficiency by reducing human interference and corruption.
Improving transparency and accountability in public spending can also increase tax morale and voluntary compliance (James and Alley, 2014).
The Enugu State Board of Internal Revenue has also introduced reforms aimed at improving tax collection efficiency and reducing evasion.
2.5 Theoretical Framework
2.5.1 Fiscal Exchange Theory
Fiscal Exchange Theory was developed by Erik Lindahl. The theory explains that taxpayers are more willing to pay taxes when they perceive a direct relationship between taxes paid and public services received.
In relation to tax evasion, the theory suggests that when government provides adequate services, taxpayers are more likely to comply, thereby reducing evasion (Ola, 2017).
2.5.2 Economic Deterrence Theory
Economic Deterrence Theory was developed by Gary Becker. It explains that individuals make rational decisions based on costs and benefits. Taxpayers will evade taxes if the benefits outweigh the expected penalties.
The theory suggests that increasing penalties, improving detection probability, and strengthening enforcement can reduce tax evasion (Becker, 1968).
This theory is highly relevant to Nigeria where weak enforcement encourages non-compliance.
2.5.3 Ability to Pay Theory
Ability to Pay Theory states that taxes should be levied based on the taxpayer’s financial capacity. It assumes that individuals with higher income should pay more tax than those with lower income.
When tax systems are perceived as unfair, taxpayers may resort to evasion as a form of resistance (Aguolu, 2015).
