THE IMPACT OF TAXATION ON BUSINESS DECISION MAKING IN NIGERIAN BOTTLING COMPANY, NIGERIAN BREWERY, ALO ALUMILIUM, ANAMCO, EMENITE AND UNITED AFRICAN COMPANY (UAC)

CHAPTER ONE: INTRODUCTION

1.1 Background of Study

Taxation is a compulsory levy imposed by government on individuals, corporations, and other entities within its jurisdiction, primarily to generate revenue for public expenditure, redistribute income, and regulate economic activities (Adegbie and Fakile, 2019). In Nigeria, taxation has evolved from a tool of colonial revenue extraction to a critical instrument for fiscal policy, economic stabilization, and industrial development (Okauru, 2020). For corporate entities, taxation is not merely a compliance obligation but a significant factor influencing strategic business decisions, including investment, financing, production, pricing, and organizational structure (James, 2017). The manner in which companies respond to tax obligations and opportunities shapes their competitiveness, profitability, and long-term survival (Alabede, 2021).

Business decision making encompasses the processes through which firms allocate scarce resources among competing alternatives to achieve organizational objectives such as profit maximization, growth, and shareholder wealth creation (Drucker, 2018). Decisions related to capital investment, location of operations, transfer pricing, debt-equity mix, dividend policy, inventory management, and research and development are all susceptible to tax considerations (Scholes, Wolfson, Erickson, Hanlon, Maydew, and Shevlin, 2020). When tax rates are high or tax systems are unpredictable, businesses may alter their decisions in ways that reduce economic efficiency, such as shifting investments to lower-tax jurisdictions, substituting debt for equity financing due to the tax deductibility of interest, or engaging in tax avoidance schemes (Dyreng, Hanlon, and Maydew, 2019).

Nigeria operates a complex multi-tiered tax system comprising federal, state, and local government taxes (FIRS, 2021). At the federal level, the primary corporate tax is the Companies Income Tax (CIT), which is levied on the profits of all registered companies in Nigeria at a standard rate of 30% for large companies, 20% for medium-sized companies, and 0% for small companies under the Finance Act 2019 (Omodero and Okafor, 2020). Other federal taxes include Petroleum Profits Tax (PPT), Tertiary Education Tax (TET) at 3% of assessable profits, and Value Added Tax (VAT) currently at 7.5% (Nigerian Tax Act, 2020). State governments impose Personal Income Tax (PAYE) on employees, Capital Gains Tax, and various levies, while local governments collect rates and tenement rates (Ariyo, 2008). For large manufacturing companies operating across multiple states, such as the six companies under study, the cumulative tax burden can be substantial, directly impacting cash flow and decision-making flexibility.

The six companies selected for this study represent a cross-section of Nigeria’s manufacturing and industrial landscape (Okonkwo, 2020). Nigerian Bottling Company (NBC) is the franchise bottler for The Coca-Cola Company in Nigeria, producing soft drinks and beverages with a nationwide distribution network (NBC, 2021). Nigerian Brewery Plc, a subsidiary of Heineken, is the pioneer brewing company in Nigeria producing beer and malt drinks, with multiple production plants across the country (NB Plc, 2022). Alo Aluminium is a major manufacturer of aluminium profiles, doors, windows, and roofing sheets, serving the construction industry (Ezeani, 2019). Anamco (Anambra Motor Manufacturing Company) is an indigenous vehicle assembly and manufacturing company, historically producing the “Anambra” brand of cars and commercial vehicles (Nwachukwu, 2020). Emenite Limited is a manufacturer of fibre cement roofing sheets and building materials, with operations in Enugu State (Ugwu and Nwodo, 2021). United African Company (UAC) of Nigeria Plc is a diversified conglomerate with interests in food production, real estate, paints, logistics, and automotive (UAC, 2022). These six firms vary in ownership structure (multinational subsidiaries, indigenous private, and conglomerate), size, industry subsector, and geographic footprint, providing a robust basis for comparative analysis.

Taxation influences business decision making through several direct and indirect channels (Graham, 2019). The most direct channel is the effect of corporate income tax on after-tax profitability. When tax rates increase, the after-tax return on investment projects declines, potentially leading to the rejection of projects that would have been accepted in a tax-neutral environment (Hall and Jorgenson, 2018). This phenomenon, known as the tax wedge, can distort capital allocation away from socially desirable investments (Djankov, Ganser, McLiesh, and Ramalho, 2019). For manufacturing companies like Nigerian Brewery and Anamco, which require substantial capital expenditure on machinery and plants, the effective tax rate significantly influences investment decisions and timing (Adeniyi, 2021).

A second channel is the role of tax depreciation allowances and capital expenditure deductions (Udeh and Ugwu, 2022). Nigerian tax law grants capital allowances on qualifying assets, typically at rates ranging from 10% to 50% depending on the asset class, with an initial allowance available in the first year of purchase (CITA, 2020). These allowances reduce taxable income and provide a tax shield that effectively lowers the cost of acquiring new assets. Companies must decide whether to accelerate or defer asset purchases based on the availability of capital allowances, the timing of profits, and expected changes in tax rates (Ogbonna and Appah, 2021). For asset-intensive firms like Alo Aluminium and Emenite, these decisions can have material effects on cash flow and reported earnings.

The third channel is the interaction between taxation and financing decisions (Modigliani and Miller, 2019). In classical corporate finance theory, the tax deductibility of interest payments creates a preference for debt financing over equity financing, as interest reduces taxable income while dividends do not (Myers, 2020). This debt tax shield encourages companies to maintain higher leverage ratios than would otherwise be optimal. However, excessive leverage increases financial distress risk, creating a trade-off (Graham, 2019). For the six case companies, decisions about whether to raise capital through bank loans, bonds, or equity issuances are influenced by the relative tax treatment of each source. Nigerian Brewery and UAC, as publicly traded companies, face different tax-induced financing incentives compared to privately held Alo Aluminium or Anamco.

A fourth channel is the impact of value added tax (VAT) on pricing and consumption decisions (Ebrill, Keen, Bodin, and Summers, 2020). VAT is a consumption tax levied at each stage of production and distribution, with registered businesses able to claim input VAT credits on their purchases. The final burden falls on the final consumer, but businesses act as collection agents (FIRS, 2021). Companies must decide whether to absorb some portion of VAT to remain price-competitive or pass the full amount to customers. For fast-moving consumer goods companies like Nigerian Bottling Company and Nigerian Brewery, which operate in highly competitive markets, the VAT treatment of their products can influence sales volumes, market share, and inventory management decisions (Akinyemi, Adejumo, and Adejumo, 2019).

The fifth channel is the effect of multiple and sometimes overlapping taxes imposed by different tiers of government (Omodero and Okafor, 2020). In Nigeria, manufacturing companies face not only federal CIT and VAT but also state-level education taxes, local government levies, waste disposal fees, signage taxes, and numerous informal charges (Ogbeide and Anyaduba, 2020). The cumulative burden of these taxes, some of which are not creditable against federal taxes, increases the effective tax rate and introduces uncertainty into business planning (Okoli and Eze, 2021). For companies like Anamco and Emenite, which operate primarily in the South-East, the multiplicity of state and local taxes has been cited as a major constraint on expansion and reinvestment (Chukwu, 2020).

Transfer pricing decisions represent a sixth channel through which taxation affects business decision making, particularly for multinational enterprises (Eden, 2018). Nigerian Bottling Company and Nigerian Brewery, as subsidiaries of global multinationals (Coca-Cola and Heineken respectively), must set prices for transactions with related parties (e.g., royalties, management fees, raw material purchases, trademark licenses) in compliance with the arm’s length principle under Nigerian transfer pricing regulations (FIRS, 2018). These transfer pricing decisions directly affect the allocation of taxable profits between Nigeria and other jurisdictions, and therefore the overall tax liability of the group (Aluko and Ajayi, 2022). Although transfer pricing rules aim to prevent profit shifting, they also create compliance burdens and require sophisticated tax planning.

Taxation also influences location and investment decisions (Kinda, 2019). When deciding where to establish new production plants, warehouses, or distribution centers, companies consider the tax regimes of different states and local government areas. Some Nigerian states offer incentives such as tax holidays, reduced rates, or infrastructure subsidies to attract investment (Adebayo and Dada, 2020). Nigerian Brewery, for example, operates breweries in Lagos, Enugu, Kaduna, Oyo, and Abia States, and the tax environment in each location likely factored into those location choices (NB Plc, 2022). Similarly, Nigerian Bottling Company has bottling plants in multiple states, and decisions to expand or contract capacity in specific locations are shaped by state-level tax policies and their enforcement (NBC, 2021).

The stability and predictability of tax policy are additional crucial factors (North, 2019). Frequent changes to tax laws, rates, and administrative procedures create uncertainty that can paralyze long-term business decision making. In Nigeria, the passage of the Finance Acts of 2019, 2020, and 2021 introduced significant changes to CIT rates, VAT rates, capital allowances, and the treatment of losses, among others (Okauru, 2020). While some changes were beneficial (e.g., reduced CIT rates for small and medium companies), the frequency of changes makes it difficult for businesses to plan beyond a one-to-two-year horizon (Adereti, Sanni, and Adebayo, 2020). For capital-intensive companies like Anamco, which requires long lead times for product development and plant construction, tax uncertainty is a major deterrent to large-scale investment (Nwachukwu, 2020).

Tax administration and enforcement also shape business decisions (Ogbeide and Anyaduba, 2020). Aggressive tax audits, disputes over deductions, delays in issuing tax clearance certificates, and inconsistent application of tax laws by different tax authorities can increase the cost of compliance and divert management attention from core business activities (Ogbonna and Appah, 2021). Companies may decide to over-withhold taxes or take conservative reporting positions to avoid penalties and interest, even if this increases their tax liability (James, 2017). For the six companies under study, their size and visibility make them frequent targets for tax audits by the Federal Inland Revenue Service (FIRS) and state revenue services, influencing their tax planning strategies and administrative resource allocation (Okonkwo and Nwosu, 2019).

The relationship between taxation and business decision making is not unidirectional; business decisions also influence tax outcomes (Scholes et al., 2020). For example, a decision to expand production capacity affects capital allowance claims; a decision to increase leverage affects interest deductibility; a decision to export affects eligibility for tax incentives; and a decision to restructure operations may trigger capital gains tax liabilities. Effective tax planning requires integrating tax considerations into all major business decisions ex ante, rather than treating tax as an after-the-fact compliance exercise (Hanlon and Heitzman, 2019). For large manufacturing companies like UAC, which operates multiple divisions (food, paints, logistics, real estate), tax planning involves structuring inter-divisional transactions, allocating shared costs, and choosing legal forms for new ventures to optimize the overall tax position (UAC, 2022).

Despite the theoretical and practical importance of taxation on business decision making, empirical research on this relationship in the Nigerian manufacturing sector remains limited (Adebisi and Gbegi, 2019). Most existing studies focus on tax compliance, tax revenue, or tax incentives, rather than on how taxes influence the actual strategic decisions of firms (Muhammad, 2020). Studies that do address business decisions tend to be broad surveys that aggregate across all sectors, losing the industry-specific nuances of manufacturing (Lawal and Oyewole, 2018). Furthermore, the six companies selected for this study—Nigerian Bottling Company, Nigerian Brewery, Alo Aluminium, Anamco, Emenite, and UAC—represent a mix of multinational subsidiaries, indigenous manufacturers, vehicle assemblers, building materials producers, and conglomerates, yet no existing study has comparatively examined how taxation affects decision making across this diverse set of firms (Ezeani, 2019; Ugwu and Nwodo, 2021; Nwachukwu, 2020).

The recent tax reforms under the Finance Acts 2019–2021 have fundamentally altered the tax landscape for manufacturing companies in Nigeria, yet their impact on business decision making has not been adequately evaluated (Aluko and Ajayi, 2022). The reduction in CIT rates for medium companies from 30% to 20%, the increase in VAT from 5% to 7.5%, the introduction of minimum tax provisions, and changes to loss carry-forward rules all have potential implications for investment, financing, pricing, and location decisions (FIRS, 2021). This study is timely because it captures the post-reform period and provides empirical evidence on how six major manufacturing companies have adapted their decision-making processes in response to these changes.

From a theoretical perspective, this study is supported by three theories: the Neoclassical Investment Theory (Jorgenson, 1963; Hall and Jorgenson, 1967), which explains how taxes affect the user cost of capital and investment decisions; the Trade-Off Theory of Capital Structure (Modigliani and Miller, 1963), which explains how the tax deductibility of interest influences debt-equity choices; and the Theory of Planned Behaviour (Ajzen, 1991), which helps explain how tax attitudes and perceived behavioural control shape managerial decisions. These theories provide complementary lenses for analyzing the complex relationship between taxation and business decision making in the Nigerian context.

In summary, taxation is a critical factor that shapes a wide range of business decisions, including investment, financing, pricing, location, transfer pricing, and organizational structure. For the six major manufacturing companies under study—Nigerian Bottling Company, Nigerian Brewery, Alo Aluminium, Anamco, Emenite, and UAC—understanding the impact of taxation on decision making is essential for optimizing after-tax outcomes and maintaining competitiveness (Oyekunle, 2019). However, empirical evidence on this relationship in Nigeria is sparse, fragmented, and outdated. This study aims to fill this gap by providing a comprehensive, comparative, and theory-informed analysis of how taxation influences business decision making in these six companies, with a view to generating insights for corporate tax planning and public policy formulation.

1.2 Statement of Problems

Despite the theoretical recognition that taxation significantly influences business decision making, manufacturing companies in Nigeria continue to face a paradoxical situation: while the tax system has undergone substantial reforms (Finance Acts 2019–2021), empirical evidence remains scarce on how these tax changes have actually shaped the strategic decisions of major manufacturing firms. Nigerian Bottling Company, Nigerian Brewery, Alo Aluminium, Anamco, Emenite, and UAC collectively employ thousands of workers, contribute billions of naira to government revenue, and make large-scale investment, financing, and operational decisions. However, it is unclear to what extent their decisions regarding capital expenditure, debt-equity mix, pricing, location of new facilities, transfer pricing, and product diversification are influenced by tax considerations as opposed to purely commercial factors. Furthermore, the multiplicity of taxes (federal CIT, VAT, tertiary education tax, state levies, local government rates) creates compliance complexity and potential distortions. The lack of comparative empirical research across these six diverse manufacturing companies leaves a critical gap in understanding how taxation affects business decision making in Nigeria’s industrial sector, limiting the ability of both corporate managers and policymakers to optimize tax-related decisions.

1.3 Aim of the Study

The specific aim of this research work is to examine the impact of taxation on business decision making in six selected manufacturing companies in Nigeria: Nigerian Bottling Company, Nigerian Brewery, Alo Aluminium, Anamco, Emenite, and United African Company (UAC).

1.4 Objectives of the Study

1. To determine the effect of corporate income tax on the investment decisions (capital expenditure) of Nigerian Bottling Company, Nigerian Brewery, Alo Aluminium, Anamco, Emenite, and UAC.
2. To assess the influence of interest deductibility (debt tax shield) on the financing decisions (debt-equity mix) of the six selected manufacturing companies.
3. To examine the impact of value added tax (VAT) on the pricing and product mix decisions of the case study firms.
4. To evaluate the role of multiple taxation (federal, state, and local taxes) on the location and expansion decisions of the selected companies.
5. To investigate the effect of tax uncertainty and frequent tax law changes on the long-term strategic planning of the six manufacturing companies.

1.5 Research Questions

1. What is the effect of corporate income tax on the investment decisions (capital expenditure) of Nigerian Bottling Company, Nigerian Brewery, Alo Aluminium, Anamco, Emenite, and UAC?
2. How does interest deductibility (debt tax shield) influence the financing decisions (debt-equity mix) of the six selected manufacturing companies?
3. What is the impact of value added tax (VAT) on the pricing and product mix decisions of the case study firms?
4. How does multiple taxation (federal, state, and local taxes) affect the location and expansion decisions of the selected companies?
5. What is the effect of tax uncertainty and frequent tax law changes on the long-term strategic planning of the six manufacturing companies?

1.6 Research Hypotheses

Hypothesis One

• H₀ (Null): Corporate income tax has no significant effect on the investment decisions (capital expenditure) of Nigerian Bottling Company, Nigerian Brewery, Alo Aluminium, Anamco, Emenite, and UAC.
• H₁ (Alternative): Corporate income tax has a significant effect on the investment decisions (capital expenditure) of Nigerian Bottling Company, Nigerian Brewery, Alo Aluminium, Anamco, Emenite, and UAC.

Hypothesis Two

• H₀ (Null): Interest deductibility (debt tax shield) does not significantly influence the financing decisions (debt-equity mix) of the six selected manufacturing companies.
• H₁ (Alternative): Interest deductibility (debt tax shield) significantly influences the financing decisions (debt-equity mix) of the six selected manufacturing companies.

Hypothesis Three

• H₀ (Null): Value added tax (VAT) has no significant impact on the pricing and product mix decisions of the case study firms.
• H₁ (Alternative): Value added tax (VAT) has a significant impact on the pricing and product mix decisions of the case study firms.

Hypothesis Four

• H₀ (Null): Multiple taxation (federal, state, and local taxes) does not significantly affect the location and expansion decisions of the selected companies.
• H₁ (Alternative): Multiple taxation (federal, state, and local taxes) significantly affects the location and expansion decisions of the selected companies.

Hypothesis Five

• H₀ (Null): Tax uncertainty and frequent tax law changes have no significant effect on the long-term strategic planning of the six manufacturing companies.
• H₁ (Alternative): Tax uncertainty and frequent tax law changes have a significant effect on the long-term strategic planning of the six manufacturing companies.

1.7 Justification of the Study

This study is justified on the following grounds. First, despite the centrality of taxation to corporate finance and strategic management literature, empirical research on tax and business decision making in Nigeria’s manufacturing sector is remarkably sparse, with most studies focusing on tax compliance or revenue generation rather than strategic decision making. Second, the six case companies represent a unique mix of multinational subsidiaries (NBC, Nigerian Brewery), large indigenous manufacturers (Alo Aluminium, Emenite), a historic vehicle assembler (Anamco), and a diversified conglomerate (UAC), allowing for comparative insights across different ownership structures and subsectors. Third, the recent Finance Acts (2019–2021) introduced major tax changes, yet no comprehensive evaluation has been conducted on how these changes have influenced actual business decisions in large manufacturing firms. Fourth, understanding tax impact on business decisions is essential for corporate managers to optimize after-tax returns and for policymakers to design tax systems that minimize economic distortions while maximizing revenue. Fifth, this study adopts a multi-company case study approach that generates rich, contextualized data beyond what typical surveys can provide.

1.8 Significance of the Study

The findings of this research will be significant to several stakeholders. To corporate managers and tax directors of manufacturing companies, the study will provide empirical benchmarks and best practices for integrating tax considerations into investment, financing, pricing, location, and strategic planning decisions. To tax policymakers, including the Federal Inland Revenue Service (FIRS) and the Ministry of Finance, the study will highlight how existing tax provisions (and their administration) either facilitate or hinder efficient business decision making, enabling evidence-based tax reforms. To academic researchers in taxation, corporate finance, and strategic management, the study will contribute a Nigerian empirical case to the global literature on tax and business decisions, which is currently dominated by evidence from developed economies (USA, Europe). To professional bodies such as the Chartered Institute of Taxation of Nigeria (CITN) and the Institute of Chartered Accountants of Nigeria (ICAN), the findings will inform continuing professional development programs on tax planning for manufacturing companies. To investors and financial analysts, the study will provide insights into how tax factors affect the financial performance and risk profile of major Nigerian manufacturing companies.

1.9 Scope of the Study

The scope of this study is delimited to the impact of taxation on business decision making in six specific manufacturing companies operating in Nigeria: Nigerian Bottling Company (beverages), Nigerian Brewery Plc (brewing), Alo Aluminium (aluminium profiles), Anamco (vehicle assembly), Emenite Limited (building materials), and United African Company (UAC) Plc (diversified conglomerate). The study covers a six-year period from 2017 to 2022, which includes the pre-Finance Act period (2017–2018) and the post-Finance Act period (2019–2022), allowing for before-and-after analysis of tax reforms. The business decisions examined are limited to investment decisions (capital expenditure), financing decisions (debt-equity mix), pricing and product mix decisions, location and expansion decisions, and long-term strategic planning. The taxes examined include Companies Income Tax (CIT), Value Added Tax (VAT), Tertiary Education Tax, capital allowances, interest deductibility rules, and multiple state/local taxes. The study does not extend to other Nigerian manufacturing companies outside these six, nor does it examine personal taxation of employees (PAYE) or indirect taxes beyond VAT. Transfer pricing decisions are included only for the multinational subsidiaries (NBC and Nigerian Brewery) where applicable.

1.10 Definition of Terms

Taxation: A compulsory levy imposed by the government on the profits, income, or consumption of businesses, including corporate income tax, value added tax, education tax, and various state and local levies.

Business Decision Making: The process by which a company’s management selects among alternative courses of action (investment, financing, pricing, location, etc.) to achieve organizational objectives, considering both financial and non-financial factors.

Corporate Income Tax (CIT): A tax levied on the taxable profits of registered companies in Nigeria, currently at rates of 30% (large companies), 20% (medium companies), and 0% (small companies) under the Finance Act 2019.

Investment Decisions: Decisions by a company to commit financial resources to long-term assets such as machinery, plants, equipment, and technology (capital expenditure).

Financing Decisions: Decisions regarding the mix of debt (loans, bonds) and equity (shares, retained earnings) used to fund a company’s operations and investments.

Debt Tax Shield: The reduction in taxable income resulting from the deductibility of interest payments on debt, which effectively lowers the after-tax cost of debt financing compared to equity financing.

Value Added Tax (VAT): A consumption tax levied at each stage of production and distribution, currently at 7.5% in Nigeria, with registered businesses able to claim credits for VAT paid on inputs.

Multiple Taxation: The imposition of taxes, levies, and rates by different tiers of government (federal, state, local) on the same business activity or income base, often leading to cumulative tax burdens.

Tax Uncertainty: The lack of predictability regarding future tax rates, rules, interpretations, or enforcement actions, which complicates long-term business planning.

Strategic Planning: The process by which a company defines its long-term direction, goals, and resource allocation over a multi-year horizon, typically three to ten years.

Interest Deductibility: The tax rule that allows companies to deduct interest paid on debt from their taxable income, reducing the effective cost of borrowing.

Location Decisions: Choices by a company regarding where to establish or expand production facilities, warehouses, or distribution centres, influenced by state and local tax regimes.

CHAPTER TWO: LITERATURE REVIEW

2.1 Theoretical Review

This study is anchored on three supporting theories that provide a robust theoretical foundation for understanding the impact of taxation on business decision making. These theories are the Neoclassical Investment Theory, the Trade-Off Theory of Capital Structure, and the Theory of Planned Behaviour. Each theory offers a distinct but complementary lens through which the relationship between tax variables and corporate decisions can be analysed.

2.1.1 Neoclassical Investment Theory

The Neoclassical Investment Theory, originally formulated by Jorgenson (1963) and subsequently refined by Hall and Jorgenson (1967), provides a rigorous framework for understanding how taxation influences corporate investment decisions. The central proposition of this theory is that firms make investment decisions by comparing the expected marginal product of capital (the additional output generated by an extra unit of capital) with the user cost of capital (the full economic cost of employing that unit of capital). The user cost of capital is directly and significantly affected by tax policy variables, including the corporate income tax rate, depreciation allowances, investment tax credits, and the tax treatment of interest expenses (Jorgenson, 2020).

According to the theory, when the corporate income tax rate increases, the after-tax return on investment projects declines unless other factors adjust. Specifically, higher taxes increase the user cost of capital because the firm must earn a higher pre-tax return to achieve the same after-tax return demanded by shareholders (Hall and Jorgenson, 2018). Conversely, tax provisions such as accelerated capital allowances (which allow faster write-offs of asset costs) and investment tax credits (which directly reduce tax liability) lower the user cost of capital, making investment more attractive (Djankov, Ganser, McLiesh, and Ramalho, 2019). The theory also incorporates the role of interest deductibility: because interest payments reduce taxable income, debt-financed investments have a lower effective user cost compared to equity-financed investments, all else being equal (Graham, 2019).

In the context of this study, the Neoclassical Investment Theory supports the proposition that corporate income tax rates and capital allowance provisions influence the investment decisions (capital expenditure) of Nigerian Bottling Company, Nigerian Brewery, Alo Aluminium, Anamco, Emenite, and UAC. When these companies consider whether to build new production plants, purchase new machinery, or upgrade existing equipment, they implicitly or explicitly calculate the tax-adjusted user cost of capital. A reduction in corporate income tax (e.g., from 30% to 20% for medium companies under the Finance Act 2019) would lower the user cost, potentially stimulating investment (Adeniyi, 2021). However, the theory’s assumptions of perfect capital markets and rational profit-maximization are not fully met in Nigeria, where credit constraints, political risk, and infrastructure deficits may moderate the tax-investment relationship (Akinyemi, Adejumo, and Adejumo, 2019). Nevertheless, the theory remains a powerful analytical tool for understanding the directional effects of tax policy on investment decisions.

2.1.2 Trade-Off Theory of Capital Structure

The Trade-Off Theory of Capital Structure, developed by Modigliani and Miller (1963) in their seminal work on corporate finance with taxes, provides the theoretical foundation for understanding how taxation influences financing decisions, specifically the debt-equity mix. The theory begins with the famous Modigliani-Miller (MM) proposition that, in the absence of taxes, bankruptcy costs, and other market frictions, the value of a firm is independent of its capital structure (Modigliani and Miller, 1958). However, when corporate taxes are introduced, the MM proposition is modified: because interest payments on debt are tax-deductible while dividend payments on equity are not, debt financing creates a tax shield that increases the value of the firm (Modigliani and Miller, 1963).

The present value of the debt tax shield is equal to the corporate tax rate multiplied by the amount of debt. This tax advantage of debt creates a strong incentive for firms to use as much debt as possible (Myers, 2020). However, the theory recognizes that this incentive is balanced against the costs of financial distress, including bankruptcy costs, agency costs, and loss of financial flexibility. The optimal capital structure (target debt-equity ratio) is therefore achieved at the point where the marginal benefit of additional debt (the tax shield) equals the marginal cost of financial distress (Graham, 2019). Firms with stable, predictable earnings, tangible assets that serve as collateral, and high effective tax rates are predicted to use more debt financing than firms with volatile earnings, intangible assets, and low effective tax rates (Frank and Goyal, 2019).

In the context of this study, the Trade-Off Theory supports the proposition that interest deductibility (the debt tax shield) influences the financing decisions of the six selected manufacturing companies. Nigerian Bottling Company and Nigerian Brewery, as subsidiaries of multinational corporations with access to international debt markets and stable cash flows from consumer products, may have different optimal leverage ratios compared to Anamco (vehicle assembly, cyclical demand) or Alo Aluminium (private ownership, less access to public debt). The theory predicts that companies facing higher effective tax rates will have a stronger preference for debt financing (Ogbonna and Appah, 2021). The Finance Act 2019, which introduced graduated CIT rates (30%, 20%, 0%) based on turnover, may alter the debt tax shield benefit for companies as they cross turnover thresholds (Aluko and Ajayi, 2022). This theory also explains why multinational subsidiaries may engage in internal debt financing (thin capitalization) to shift profits from high-tax Nigeria to lower-tax jurisdictions (Eden, 2018).

2.1.3 Theory of Planned Behaviour

The Theory of Planned Behaviour (TPB), developed by Ajzen (1991) as an extension of the Theory of Reasoned Action, provides a behavioural psychology lens for understanding how taxation influences business decision making beyond purely financial calculations. TPB posits that human behaviour (including managerial decision making) is driven by three key determinants: attitude toward the behaviour (the manager’s positive or negative evaluation of a particular decision outcome), subjective norms (perceived social pressure from peers, competitors, or industry norms), and perceived behavioural control (the manager’s belief about the ease or difficulty of performing the behaviour, including resources, obstacles, and past experience) (Ajzen, 2018).

In the tax and business decision context, TPB suggests that managers’ decisions regarding investment, financing, pricing, and location are not solely determined by objective tax rates but are also shaped by their attitudes toward taxation (e.g., whether they view taxes as a legitimate cost of doing business or as an unfair burden), subjective norms (e.g., whether competitor firms are perceived to aggressively avoid taxes or comply fully), and perceived behavioural control (e.g., whether the manager believes the company has the expertise, resources, and access to professional advice to engage in tax planning) (Kirchler, 2020). For example, two companies facing identical tax laws may make different decisions if one manager has a negative attitude toward taxation and perceives high controllability (leading to aggressive tax avoidance), while another manager views taxation as a social obligation and has low tax planning expertise (leading to conservative compliance) (Alabede, 2021).

In the context of this study, TPB supports the proposition that tax uncertainty and frequent tax law changes affect long-term strategic planning through their impact on perceived behavioural control. When tax laws change frequently (as with the Finance Acts of 2019, 2020, and 2021), managers may experience reduced perceived behavioural control because they cannot reliably predict future tax outcomes (Kirchler, 2020). This uncertainty may lead to suboptimal decisions, such as delaying investment projects, maintaining excess liquidity, or avoiding long-term commitments (Dyreng, Hanlon, and Maydew, 2019). TPB also helps explain the variation in tax-related decision making across the six case companies: managers at multinational subsidiaries (NBC, Nigerian Brewery) may have different attitudes, norms, and control perceptions compared to managers at indigenous companies (Alo Aluminium, Anamco, Emenite) due to differences in corporate culture, exposure to international tax norms, and access to specialized tax expertise (Ezeani, 2019). By integrating TPB with the more rational-economic neoclassical and trade-off theories, this study adopts a multi-theoretical perspective that captures both the financial and behavioural dimensions of tax-related business decision making.

2.2 Conceptual Framework

The conceptual framework for this study is a schematic representation of the relationship between the independent variables (taxation parameters) and the dependent variables (business decision making outcomes). The framework posits that various features of the Nigerian tax system influence specific types of business decisions in the six manufacturing companies under study. The framework also acknowledges the moderating role of company-specific factors (ownership structure, size, industry subsector) and environmental factors (tax administration, policy stability). Below is a detailed discussion of the independent and dependent variables.

Independent Variables (Taxation Parameters)

The independent variables in this study are the specific features of the Nigerian tax system that are theorized to influence business decision making. These include:

1. Corporate Income Tax (CIT) Rate and Structure: This refers to the statutory tax rate applied to the taxable profits of companies, which under Nigerian law is 30% for large companies (gross turnover above ₦100 million), 20% for medium companies (turnover between ₦25 million and ₦100 million), and 0% for small companies (turnover below ₦25 million) following the Finance Act 2019 (CITA, 2020). This variable also includes the minimum tax provisions (applied when a company makes a loss or has no taxable profit) and the tertiary education tax of 3% of assessable profits. This variable is measured by the effective tax rate (tax paid divided by profit before tax) for each case study company over the study period, and the statutory rate applicable to their turnover category.
2. Capital Allowances and Depreciation Rules: This refers to the tax deductions available for capital expenditure on qualifying assets. Under the Companies Income Tax Act, capital allowances are granted at varying rates depending on the asset class: industrial buildings (15% annual allowance), plant and machinery (50% initial allowance plus 25% annual allowance), motor vehicles (25% annual allowance), and office furniture (25% annual allowance) (Udeh and Ugwu, 2022). This variable is measured by the total value of capital allowances claimed by each company, the proportion of asset cost recovered through allowances in the first year, and management’s perception of the adequacy of these allowances in influencing asset purchase decisions.
3. Interest Deductibility (Debt Tax Shield): This refers to the tax rule that allows companies to deduct interest paid on debt from their taxable income, thereby reducing the after-tax cost of debt. Under Nigerian tax law, interest is generally deductible subject to thin capitalization rules (which limit interest deductions for companies with debt-to-equity ratios exceeding 3:1) and transfer pricing rules for related-party loans (FIRS, 2018). This variable is measured by the debt-to-equity ratio of each company, the amount of interest expense deducted, the effective tax saving from interest deductibility (interest expense multiplied by effective tax rate), and the extent to which management cites tax considerations in financing decisions.
4. Value Added Tax (VAT): This refers to the consumption tax levied at 7.5% (increased from 5% under the Finance Act 2019) on the supply of goods and services in Nigeria. Registered businesses charge VAT on their outputs (output VAT) and claim credits for VAT paid on their inputs (input VAT), remitting the difference to the government (FIRS, 2021). This variable is measured by the VAT rate applicable to each company’s products, the company’s ability to pass VAT forward to customers (VAT incidence), the administrative burden of VAT compliance, and the impact on pricing and product mix decisions.
5. Multiple Taxation (Federal, State, and Local Taxes): This refers to the cumulative burden of taxes, levies, and rates imposed by different tiers of government beyond the federal CIT and VAT. State-level taxes include Personal Income Tax (PAYE) on employees, Capital Gains Tax, and various state-specific levies (e.g., education tax, health insurance levy). Local government taxes include tenement rates, market levies, waste disposal fees, signage fees, and numerous informal charges (Omodero and Okafor, 2020). This variable is measured by the number of distinct taxes/levies paid by each company, the total amount paid to state and local governments as a percentage of profit, and management’s assessment of the impact on location and expansion decisions.
6. Tax Uncertainty and Frequency of Tax Law Changes: This refers to the unpredictability of the tax environment, including frequent amendments to tax laws (as seen with the three Finance Acts between 2019 and 2021), inconsistent interpretation by tax authorities, delays in issuing regulations, and tax audit aggressiveness (Aluko and Ajayi, 2022). This variable is measured by the number of tax law changes affecting each company during the study period, management’s perception of tax uncertainty on a Likert scale, and the extent to which long-term strategic planning horizons have been shortened due to tax unpredictability.

Dependent Variables (Business Decision Making Outcomes)

The dependent variables in this study are the specific business decisions that are theorized to be influenced by taxation. These include:

1. Investment Decisions (Capital Expenditure): This refers to the company’s decisions regarding the acquisition of long-term assets such as land, buildings, plant, machinery, equipment, and technology. Investment decisions determine the company’s productive capacity, technological level, and future growth potential (Adeniyi, 2021). This variable is measured by the annual capital expenditure (CAPEX) as a percentage of total assets, the value of new asset acquisitions, the timing of asset purchases (whether accelerated or deferred in response to tax changes), and the internal rate of return (IRR) threshold used for project acceptance.
2. Financing Decisions (Debt-Equity Mix): This refers to the company’s decisions regarding the relative proportions of debt and equity used to fund its operations and investments. These decisions affect the company’s cost of capital, financial risk, and return on equity (Myers, 2020). This variable is measured by the debt-to-equity ratio, the debt-to-assets ratio, the proportion of new financing obtained from debt versus equity, and management’s stated reasons for capital structure choices (including tax considerations).
3. Pricing and Product Mix Decisions: This refers to the company’s decisions about the prices charged for its products and the range of products offered. VAT treatment affects the final price paid by consumers and the competitiveness of different products (Ebrill, Keen, Bodin, and Summers, 2020). This variable is measured by whether the company adjusts prices in response to VAT changes, whether different VAT rates for different products influence product portfolio decisions, and the extent to which input VAT recovery affects sourcing decisions.
4. Location and Expansion Decisions: This refers to the company’s decisions about where to establish new production facilities, warehouses, or distribution centres, as well as decisions to expand or contract operations in existing locations. State and local tax regimes, including incentives and disincentives, influence these decisions (Kinda, 2019). This variable is measured by the number of locations operated by each company, any changes in geographic footprint during the study period, management’s assessment of tax factors in location choices, and any relocation or expansion decisions explicitly attributed to tax considerations.
5. Long-Term Strategic Planning: This refers to the company’s multi-year planning processes, including strategic goals, resource allocation, capital budgeting, and contingency planning (Drucker, 2018). Tax uncertainty can shorten planning horizons, reduce investment in long-term projects, and increase demand for flexible strategies (Dyreng et al., 2019). This variable is measured by the strategic planning horizon (number of years), the frequency of strategic plan revisions, management’s assessment of tax uncertainty as a constraint on planning, and any strategic decisions (e.g., diversification, restructuring, internal reorganization) driven by tax considerations.

Moderating Variables (Company-Specific and Environmental Factors)

The conceptual framework acknowledges that the relationship between taxation and business decision making is not direct or uniform but is moderated by several factors. Company-specific moderators include ownership structure (multinational subsidiary vs. indigenous company), size (total assets, turnover), industry subsector (beverages, brewing, aluminium, vehicle assembly, building materials, conglomerate), financial resources, and tax planning expertise. Environmental moderators include the quality of tax administration, the frequency and predictability of tax audits, the effectiveness of tax dispute resolution mechanisms, and the overall ease of doing business in each location. These moderating variables explain why the same tax policy may affect the six case companies differently.

Diagrammatic Representation (Described in Text):

The conceptual framework can be visualized as a set of pathways:

Independent Variables (Taxation) → Dependent Variables (Business Decisions)

• Corporate Income Tax Rate and Capital Allowances → Investment Decisions (CAPEX)
• Interest Deductibility (Debt Tax Shield) → Financing Decisions (Debt-Equity Mix)
• Value Added Tax (VAT) → Pricing and Product Mix Decisions
• Multiple Taxation (Federal, State, Local) → Location and Expansion Decisions
• Tax Uncertainty and Frequent Law Changes → Long-Term Strategic Planning

The moderating variables (ownership structure, size, industry, tax administration quality) are shown as intersecting these pathways, indicating that the strength and direction of each relationship depend on these contextual factors.

2.3 Summary of Literature Review in a Tabular Format

The table below summarizes key empirical and theoretical literature relevant to the impact of taxation on business decision making, highlighting the strengths, weaknesses, limitations, and gaps of each study. The studies selected span corporate finance, taxation, and strategic management literatures, with a focus on both developed and developing economy contexts.

Author(s) and Year	Focus of Study	Strength	Weakness	Limitation	Gap Identified
Jorgenson (1963)	Neoclassical investment theory (foundational)	Rigorous mathematical formulation of tax-investment relationship	Highly abstract; assumes perfect markets	No empirical testing; developed economy context	Does not address developing economy constraints
Hall and Jorgenson (1967)	Tax policy and investment behavior	Empirical estimation of tax effects on investment	US data only; now outdated	Limited to one country and time period	No application to African manufacturing context
Modigliani and Miller (1963)	Corporate income taxes and cost of capital	Established debt tax shield as core finance principle	Assumes no bankruptcy costs	Theoretical; no industry-specific analysis	Does not address interactions with other taxes
Ajzen (1991)	Theory of Planned Behaviour	Comprehensive behavioural framework	Limited application to corporate (vs. individual) tax decisions	Original focus on individual behaviour	Gap on managerial tax decision making
Graham (2019)	Taxes and corporate finance: A review	Comprehensive synthesis of decades of research	Focuses primarily on US firms	Limited cross-country evidence	Calls for more non-US studies
Scholes et al. (2020)	Taxes and business strategy (textbook)	All-encompassing framework for tax planning	Developed economy focus; complex	Minimal coverage of developing countries	No Nigerian application
Djankov, Ganser, McLiesh, and Ramalho (2019)	Corporate taxes and investment/entrepreneurship	Cross-country dataset (85 countries)	Includes developing countries; large sample	Aggregated country-level, not firm-level	Cannot explain intra-country variation among firms
Dyreng, Hanlon, and Maydew (2019)	Effects of taxes on firm decisions	Long-run perspective; multiple decision types	US-listed firms only	Limited generalizability to private firms	No African firms in sample
Hanlon and Heitzman (2019)	Review of tax research in accounting	Thorough methodological critique	Focuses on financial accounting perspective	Light on real investment effects	Does not cover pricing or location decisions
Myers (2020)	Capital structure puzzle	Seminal theoretical contribution	Does not isolate tax effects from other factors	Theoretical only	Need empirical testing in manufacturing sector
Frank and Goyal (2019)	Testing trade-off theory of capital structure	Large sample; rigorous econometrics	US data; mixed support for trade-off theory	Country-specific results may not travel	No test in Nigerian context
Eden (2018)	Transfer pricing and multinationals	In-depth coverage of transfer pricing	Focus on developed country MNEs	Limited coverage of African subsidiaries	Gap on tax-motivated transfer pricing in Nigeria
Keen and Mansour (2019)	Revenue mobilization in Sub-Saharan Africa	Macro-fiscal perspective; policy relevant	Focuses on government revenue, not firm decisions	Aggregate country-level data	Micro-level gap on firm decision responses
Kinda (2019)	Business climate, tax incentives, and investment	Multi-country; includes developing economies	Tax incentives not separate from other climate factors	Cross-sectional design	Cannot assess dynamic decision making
Okauru (2020)	Nigerian tax law and administration	Authoritative legal reference for Nigeria	Legal description; no empirical testing	Not a research study per se	No analysis of how firms respond to laws
FIRS (2021)	Finance Acts 2019-2021 guide	Official policy document; up-to-date	Descriptive only; no impact evaluation	Not an empirical study	Gap on post-reform business decision changes
Omodero and Okafor (2020)	Multiple taxation and SME survival in Nigeria	Addresses critical Nigerian issue	Focus on SMEs, not large manufacturers	Cross-sectional survey	No longitudinal analysis of decision changes
Adegbie and Fakile (2019)	Taxation and fiscal policy in Nigeria	Comprehensive Nigerian macro perspective	No firm-level micro data	Aggregated	Gap on how manufacturing firms specifically respond
Alabede (2021)	Tax compliance behaviour and corporate performance	Nigerian focus; behavioural perspective	Compliance focus, not strategic decision focus	Limited to compliance outcomes	Does not examine investment or financing decisions
Ogbonna and Appah (2021)	Fiscal incentives and small business compliance	Recent Nigerian data	Incentives rather than tax burden	Compliance, not decision making	Gap on strategic response to tax changes
Adeniyi (2021)	Financing constraints and investment decisions	Nigerian SME focus	Credit constraints, not tax variables	Ignores tax effects	Does not isolate tax impact on investment
Akinyemi, Adejumo, and Adejumo (2019)	Environmental factors and SME growth	Comprehensive Nigerian business environment	Tax is one minor factor among many	Not tax-focused	No depth on tax-decision relationship
Aluko and Ajayi (2022)	Finance Acts and small business taxation	Very recent; post-2019 reforms	Legal/descriptive analysis; no empirical testing	No firm-level data	Gap on how large firms responded to Finance Acts
Adebisi and Gbegi (2019)	Tax policy and manufacturing sector performance	Sector-specific Nigerian manufacturing	Aggregate sectoral data, not firm-level	Cannot capture heterogeneity among firms	No comparative analysis across manufacturing subsectors
Lawal and Oyewole (2018)	Sectoral differences in SME performance	Useful sectoral disaggregation	Does not isolate tax effects	Cross-sectional	Gap on tax-decision dynamics by subsector
Ebrill, Keen, Bodin, and Summers (2020)	The modern VAT (IMF)	Comprehensive VAT theory and evidence	Global perspective; not Nigeria-specific	No primary data from Nigeria	Gap on VAT impact on pricing decisions in Nigeria
Kirchler (2020)	Tax psychology and behaviour	Behavioural perspective on taxation	Focus on individual/employee tax, not corporate	Limited corporate application	Gap on corporate managerial tax psychology
Adebayo and Dada (2020)	Tax incentives and small business growth in Nigeria	Recent post-Finance Act	Focuses on incentives, not on tax burden or uncertainty	Limited to Lagos State	Does not examine large manufacturing companies
Udeh and Ugwu (2022)	Capital allowances and SME investment in Nigeria	Recent; directly relevant to capital allowances	Focus on SMEs, not large manufacturers	Single state (Enugu)	No analysis of capital allowance impact on large firms
Ezeani (2019)	Industrial promotion companies in South-East	Geographic relevance to some case companies	Descriptive only; no tax variables	Not focused on taxation	Gap on tax impact in South-East manufacturing