Project – Tax Compliance and Revenue Generation in Nigeria: A Case Study of Lagos State Internal Revenue Service.

CHAPTER ONE

INTRODUCTION

Topic: Tax Compliance and Revenue Generation in Nigeria: A Case Study of Lagos State Internal Revenue Service

1.1 Background to the Study

Taxation is one of the major instruments through which governments mobilise financial resources to provide public goods and services, finance infrastructure, maintain public institutions and promote economic development. It involves the compulsory financial contributions imposed by government on individuals, businesses and other taxable entities in accordance with established laws. Revenue generated through taxation enables governments to finance essential responsibilities such as education, healthcare, security, transportation, environmental management and public administration. A functional tax system therefore provides a relatively dependable source of government revenue and reduces excessive dependence on borrowing and other sources of public finance. The Organisation for Economic Co-operation and Development (OECD, 2023) explains that effective tax systems are essential for domestic resource mobilisation and the financing of sustainable development. Similarly, the International Monetary Fund (IMF, 2011) identifies effective revenue administration and improved tax compliance as important elements of strengthening domestic revenue mobilisation. These perspectives demonstrate that taxation is not merely a means of collecting money from citizens but also an important mechanism for promoting fiscal responsibility, economic stability and the provision of public services. Consequently, the ability of government to generate adequate revenue depends substantially on the effectiveness of its tax administration and the willingness of taxpayers to comply with their tax obligations.

Tax compliance refers to the willingness and actual behaviour of taxpayers in fulfilling their obligations under applicable tax laws. It involves registering with the appropriate tax authority, providing accurate information about taxable income, submitting required returns, making correct tax payments and meeting relevant filing deadlines. Tax compliance may be voluntary, where individuals and organisations fulfil their obligations without direct enforcement pressure, or enforced, where compliance is achieved through audits, penalties, investigations and other regulatory measures. Kirchler (2007) explains that tax compliance is influenced by economic considerations, taxpayers’ attitudes, perceptions of fairness, trust in government and the relationship between taxpayers and tax authorities. Similarly, Alm (2019) observes that tax compliance is affected by the structure of tax administration, enforcement mechanisms, social norms and the perceived legitimacy of the tax system. These explanations suggest that taxpayers are more likely to comply when tax rules are clear, administrative procedures are convenient, public institutions are perceived as accountable and enforcement is fair and consistent. Therefore, improving tax compliance requires a combination of effective enforcement, taxpayer education, administrative efficiency and public confidence in the tax system.

Revenue generation is closely connected to tax compliance because the amount of revenue collected by government depends partly on the proportion of taxable individuals and organisations that fulfil their statutory obligations. When taxpayers accurately declare their income and pay the correct taxes, government is better positioned to mobilise the resources required for public expenditure. Conversely, tax evasion, under-declaration of income, non-registration, late payment and deliberate refusal to comply can create revenue leakages and reduce the amount of money available for development. The relationship between taxation and revenue generation is particularly important at the subnational level, where state governments depend significantly on internally generated revenue to finance their responsibilities. Enahoro and Jayeola (2012), in their study of tax administration and revenue generation in Lagos State, found that tax administration, tax regulations and tax laws were significantly related to revenue generation. Their findings demonstrate that the effectiveness of revenue mobilisation is influenced not only by the existence of tax laws but also by the administrative systems through which tax obligations are assessed, collected and remitted. Similarly, Asaolu, Dopemu and Monday (2015) found that tax reforms had a positive and significant effect on the revenue structure of Lagos State, showing the importance of effective tax administration and reforms in strengthening internally generated revenue.

In Nigeria, taxation plays an important role in supporting government finances at the federal, state and local government levels. However, tax administration has historically faced challenges such as low levels of voluntary compliance, inadequate taxpayer information, informal economic activities, weak enforcement, multiple taxation concerns, poor record-keeping and limited public understanding of tax obligations. These challenges can make it difficult for tax authorities to identify eligible taxpayers, assess taxable income accurately and collect the revenue legally due to government. The Federal Government has introduced reforms to improve tax administration, broaden the tax base and strengthen compliance. A significant recent development is the Nigeria Tax Act 2025 and the Nigeria Tax Administration Act 2025, which commenced on 1 January 2026. The Nigeria Tax Administration Act provides a harmonised framework for tax assessment, collection and administration, with the stated objectives of facilitating tax compliance and optimising tax revenue (Federal Republic of Nigeria, 2025). These reforms demonstrate the importance attached to improving compliance and revenue mobilisation within Nigeria’s evolving tax system. However, the effectiveness of any tax reform depends on its implementation, public awareness, institutional capacity and the willingness of taxpayers to fulfil their obligations.

Lagos State occupies an important position in Nigeria’s economic and commercial activities because of its concentration of businesses, financial institutions, industries, professionals, workers and other income-generating activities. This creates a substantial potential tax base for the state, but it also presents administrative challenges because taxpayers operate across different sectors and levels of economic activity. The Lagos State Internal Revenue Service (LIRS) is the principal state agency responsible for administering taxes assigned to the state under the applicable legal framework. Its responsibilities include taxpayer registration, tax assessment, collection, enforcement, taxpayer education and the administration of relevant state taxes. The importance of effective tax administration in Lagos State has been demonstrated by empirical studies. Asaolu et al. (2015) reported that tax revenue constituted a major component of internally generated revenue in Lagos State and that tax reforms contributed significantly to the state’s revenue structure. Isimoya (2022), in a study specifically titled Tax Compliance and Revenue Generation in Lagos State, found a statistically significant relationship between tax compliance and revenue generation. The study also identified tax audit and investigation and electronic tax filing as relevant factors associated with compliance and revenue generation. These findings establish the relevance of examining tax compliance as a major determinant of revenue mobilisation in Lagos State.

One important factor influencing tax compliance is the effectiveness of tax audit and enforcement. Tax audit involves the examination of taxpayers’ financial records, declarations and supporting documents to determine whether their tax obligations have been accurately reported and fulfilled. Enforcement involves the application of relevant legal and administrative measures to address non-compliance, including assessments, penalties, recovery procedures and prosecution where appropriate. Effective audit and enforcement can discourage tax evasion, identify under-declared income and encourage taxpayers to comply with established regulations. Agbede (2024), in a study of tax audit and government revenue generation in Lagos State, examined Pay-As-You-Earn and Direct Assessment revenues over the period 2012–2023 and found that tax audits positively and significantly influenced both revenue categories. Similarly, Alm (2019) explains that enforcement can influence compliance, although its effectiveness is strengthened when taxpayers also perceive the tax system as fair and legitimate. These findings indicate that tax audit and enforcement are important instruments for improving compliance and protecting government revenue. However, enforcement must be carried out transparently and consistently to avoid discouraging willing taxpayers or creating unnecessary administrative burdens.

Technological development has also changed the way tax authorities register taxpayers, process returns, assess liabilities, receive payments and monitor compliance. Electronic tax administration allows taxpayers to perform certain tax-related activities through digital platforms, reducing dependence on manual procedures and improving the accessibility of tax services. These systems can improve record management, reduce administrative delays, support the identification of taxpayers and make it easier for tax authorities to reconcile payments with tax liabilities. Ajape, Afara and Uthman (2018) examined the influence of electronic tax systems on tax administration and revenue generation in Lagos State, reporting that respondents recognised the positive contribution of electronic tax systems to administrative efficiency and revenue-generating capacity. Anioke (2024), in a study of digital tax administration and revenue generation in Lagos State between 2008 and 2018, found that automated tax collection and self-assessment filing contributed to improvements in internally generated revenue. Furthermore, Isimoya (2022) identified electronic tax filing as a significant factor associated with tax compliance and revenue generation in Lagos State. These studies suggest that digital tax administration can support compliance by improving convenience, accessibility and administrative monitoring. Nevertheless, the effectiveness of digital systems may depend on taxpayers’ digital literacy, system reliability, data accuracy, internet access and the ability of the tax authority to provide adequate technical support.

Taxpayer education and public awareness are equally important to the achievement of effective tax compliance and revenue generation. Some taxpayers may fail to meet their obligations because they do not understand the relevant tax laws, filing procedures, assessment requirements or payment deadlines. Others may deliberately avoid taxation because of negative perceptions about government accountability, the use of public revenue or the fairness of the tax system. Taxpayer education helps to explain tax responsibilities, clarify procedures, correct misconceptions and encourage voluntary compliance. Kirchler (2007) emphasises that tax behaviour is influenced by taxpayers’ perceptions of fairness, trust and their relationship with tax authorities, while Alm (2019) highlights the relevance of institutional legitimacy, social norms and administrative practices in shaping compliance decisions. In Lagos State, the importance of taxpayer education is reinforced by the findings of Isimoya (2022), which connect tax compliance with revenue generation and identify administrative measures such as tax audits and electronic filing as relevant to the tax system. Although the state has introduced several administrative and technological measures to strengthen revenue collection, the extent to which taxpayer education, audit and enforcement, electronic tax administration and voluntary compliance contribute to revenue generation remains an important subject for empirical investigation. This study therefore examines tax compliance and revenue generation in Nigeria, using the Lagos State Internal Revenue Service as its case study.

1.2 Statement of the Problem

Tax revenue is essential to the ability of government to finance public services, execute development projects and meet its statutory responsibilities. However, the capacity of government to generate adequate revenue depends not only on the existence of taxable economic activities but also on the extent to which individuals and organisations comply with their tax obligations. In Nigeria, tax compliance remains an important concern because non-registration, under-declaration of income, tax evasion, late payment and failure to submit accurate returns can reduce the revenue available to government. These challenges are particularly significant in a commercially active state such as Lagos, where the volume and diversity of economic activities create a broad tax base that requires effective administration. Although the Lagos State Internal Revenue Service has responsibility for administering relevant state taxes, the existence of an established tax authority does not automatically guarantee that all eligible taxpayers will comply with their obligations. Enahoro and Jayeola (2012) found that tax administration in Lagos State was not entirely efficient and that administrative effectiveness was significantly related to revenue generation. This raises concern about the extent to which existing tax administration practices have succeeded in achieving adequate compliance and maximising the revenue potential of the state.

Another problem concerns the persistence of tax evasion and other forms of non-compliance, which can undermine government revenue even when tax laws and assessment procedures are in place. Some individuals and business organisations may fail to register with the appropriate tax authority, provide incomplete financial information, understate taxable income or delay the payment of assessed liabilities. Such practices create revenue leakages and place additional pressure on compliant taxpayers and government institutions. Although tax audits, investigations and enforcement procedures are intended to identify and discourage these activities, their effectiveness may be affected by inadequate personnel, limited access to reliable financial information, weak monitoring systems and the complexity of economic transactions. Agbede (2024) found that tax audits positively and significantly influenced Pay-As-You-Earn and Direct Assessment revenue generation in Lagos State, suggesting that audit activities can strengthen revenue collection. Nevertheless, the extent to which tax audit and enforcement are consistently applied by LIRS to improve taxpayer compliance and reduce revenue leakages requires further examination.

Furthermore, the transition towards electronic and digital tax administration has created opportunities for improving tax compliance, but it has also introduced challenges that may affect its effectiveness. Electronic registration, filing and payment systems can reduce manual processes, improve record management and make tax services more accessible. However, taxpayers may experience difficulties arising from inadequate digital knowledge, unreliable internet access, technical problems, limited awareness of available platforms and concerns about the security or accuracy of electronic transactions. Similarly, tax authorities may encounter challenges relating to system maintenance, data integration and the effective use of digital information for monitoring compliance. Ajape, Afara and Uthman (2018) reported that electronic tax administration was positively recognised as a means of improving tax administration efficiency and revenue generation in Lagos State, while Anioke (2024) found that digital tax administration contributed to improvements in internally generated revenue. Despite these findings, it remains necessary to determine whether electronic tax administration is translating into improved compliance and sustainable revenue generation in the operations of LIRS.

A further concern is that taxpayers’ understanding of their obligations and perceptions of the tax system may influence their willingness to comply. Where taxpayers have inadequate knowledge of tax laws, filing requirements and payment procedures, they may unintentionally fail to meet their obligations. Similarly, perceptions of unfair taxation, poor public accountability and inadequate communication between the tax authority and taxpayers may discourage voluntary compliance. While enforcement can compel some taxpayers to fulfil their obligations, sustainable revenue generation also requires public awareness, accessible tax information and confidence in the administration of the tax system. Isimoya (2022) found a significant relationship between tax compliance and revenue generation in Lagos State and identified tax audit and investigation and electronic tax filing as relevant factors. However, there is still a need to examine how voluntary compliance, tax audit and enforcement, electronic tax administration and taxpayer education collectively relate to revenue generation in the specific context of LIRS. The central problem addressed by this study is therefore the need to establish the extent to which tax compliance influences revenue generation in Lagos State and identify the administrative factors that can strengthen compliance and improve the revenue performance of the Lagos State Internal Revenue Service.

1.3 Objectives of the Study

The main objective of this study is to examine tax compliance and revenue generation in Nigeria, using the Lagos State Internal Revenue Service as a case study.

The specific objectives are to:

1. Examine the effect of voluntary tax compliance on revenue generation by the Lagos State Internal Revenue Service.

2. Assess the influence of tax audit and enforcement on revenue generation by the Lagos State Internal Revenue Service.

3. Determine the effect of electronic tax administration on revenue generation by the Lagos State Internal Revenue Service.

4. Examine the influence of taxpayer education and awareness on revenue generation by the Lagos State Internal Revenue Service.

1.4 Research Questions

The following research questions will guide the study:

1. What effect does voluntary tax compliance have on revenue generation by the Lagos State Internal Revenue Service?

2. How does tax audit and enforcement influence revenue generation by the Lagos State Internal Revenue Service?

3. What effect does electronic tax administration have on revenue generation by the Lagos State Internal Revenue Service?

4. How does taxpayer education and awareness influence revenue generation by the Lagos State Internal Revenue Service?

1.5 Research Hypothesis

The following null hypothesis will be tested at a 0.05 level of significance:

H₀: Tax compliance has no significant effect on revenue generation by the Lagos State Internal Revenue Service.

1.6 Significance of the Study

This study will be significant to the Lagos State Internal Revenue Service, Lagos State Government, taxpayers, tax professionals, policymakers, researchers and students.

Lagos State Internal Revenue Service: The findings will provide useful information on the relationship between tax compliance and revenue generation. The study may assist the Service in identifying areas where tax administration can be improved, particularly in voluntary compliance, tax audits, enforcement, electronic tax administration and taxpayer education. It may also support the development of strategies for reducing revenue leakages and improving the effectiveness of tax collection.

Lagos State Government: The study will provide information that may assist the state government in strengthening internally generated revenue and reducing excessive dependence on external sources of funding. The findings may support decisions concerning tax administration reforms, revenue mobilisation strategies and the financing of public infrastructure and social services.

Taxpayers: The study will increase awareness of the importance of fulfilling tax obligations and the relationship between compliance and government revenue. It may also help taxpayers understand the importance of accurate tax declarations, timely filing and payment, and the use of approved electronic tax platforms.

Tax professionals and consultants: Accountants, tax practitioners and consultants may benefit from the findings by gaining further understanding of the administrative and behavioural factors that influence taxpayer compliance. The study may also provide useful insights for improving tax advisory services and supporting clients in meeting their statutory obligations.

Government policymakers: The findings may assist policymakers in evaluating the effectiveness of existing tax administration strategies and identifying areas requiring improvement. The study may also provide information for developing policies that promote fair taxation, strengthen enforcement and improve taxpayer confidence.

Researchers and students: The study will contribute to academic literature on taxation, tax compliance and revenue generation in Nigeria. It may serve as a reference for future research on tax administration, internally generated revenue and the effectiveness of state revenue authorities.

1.7 Scope of the Study

The study will focus on tax compliance and revenue generation in Nigeria, using the Lagos State Internal Revenue Service as its case study.

Geographically, the study will be limited to the Lagos State Internal Revenue Service and the relevant tax administration activities within Lagos State. In terms of content, it will examine four dimensions of tax compliance and administration: voluntary tax compliance, tax audit and enforcement, electronic tax administration, and taxpayer education and awareness.

Revenue generation will be examined in relation to the ability of LIRS to assess, collect and account for tax revenue, improve compliance and reduce revenue leakages. The study will obtain relevant information from appropriate personnel of the Service and, where the research design requires, taxpayers with knowledge or experience of the state’s tax administration system.

1.8 Limitations of the Study

The study may encounter certain limitations during data collection and analysis.

One possible limitation is the sensitivity of tax and revenue information. Some respondents may be unwilling to disclose information relating to tax administration procedures, compliance challenges and revenue collection. To address this challenge, respondents will be assured that the information provided will be treated confidentially and used strictly for academic purposes.

Another possible limitation is the difficulty of reaching relevant personnel within the Lagos State Internal Revenue Service because of official schedules, administrative procedures and workload. The researcher will make appropriate arrangements to administer and retrieve the research instrument at convenient times.

The study may also be affected by limited financial resources and time constraints. These challenges may restrict the number of respondents that can be reached. However, proper planning and the selection of an appropriate sample will be used to ensure that the study obtains relevant information for addressing its research objectives.

1.9 Operational Definition of Terms

Taxation: The compulsory financial contribution imposed by government on individuals, businesses and other taxable entities to finance public expenditure and provide essential services.

Tax Compliance: The extent to which taxpayers fulfil their legal obligations by registering, declaring taxable income accurately, submitting tax returns and paying the correct taxes within the prescribed period.

Revenue Generation: The process through which government mobilises financial resources, particularly through taxation and other legally recognised sources, to finance its activities and responsibilities.

Lagos State Internal Revenue Service (LIRS): The state revenue authority responsible for administering relevant state taxes, including taxpayer registration, assessment, collection, enforcement and taxpayer services in Lagos State.

Voluntary Tax Compliance: The willingness of taxpayers to fulfil their tax obligations accurately and promptly without requiring direct enforcement action from the tax authority.

Tax Audit: The examination of taxpayers’ records, declarations and financial information to determine whether their tax liabilities have been accurately reported and paid.

Tax Enforcement: The application of legal and administrative measures by a tax authority to ensure that taxpayers comply with applicable tax laws and regulations.

Electronic Tax Administration: The use of digital systems and information technology for taxpayer registration, tax assessment, filing, payment processing, record management and compliance monitoring.

Taxpayer Education: The provision of relevant information, guidance and awareness programmes to help taxpayers understand their tax obligations and the procedures for meeting them.

Tax Evasion: The illegal and deliberate act of reducing or avoiding tax liability through practices such as concealing income, falsifying records or making inaccurate declarations.

Internally Generated Revenue (IGR): Revenue raised directly by a state government through taxes, fees, levies and other approved sources within its jurisdiction.

Tax Administration: The institutional and operational processes through which a tax authority registers taxpayers, assesses tax liabilities, collects payments, monitors compliance and enforces tax laws.

Project – Tax Compliance and Revenue Generation in Nigeria: A Case Study of Lagos State Internal Revenue Service.