Capital Structure of Nigerian Construction Firms

Background to the Study

The Enduring Relevance of Capital Structure Theory

The modern study of capital structure begins with a provocation. In 1958, Franco Modigliani and Merton Miller argued, under a set of idealised conditions — no taxes, no transaction costs, no bankruptcy risk, symmetric information — that how a firm finances itself is simply irrelevant to its value. The proposition was elegant and counterintuitive in equal measure, and it set off more than six decades of scholarly effort to explain why, in real markets filled with frictions and imperfections, the financing mix actually matters a great deal.

Three theoretical frameworks now dominate the field. The trade-off theory (Kraus & Litzenberger, 1973; Bradley et al., 1984) holds that firms balance the interest-tax shield — the tax deductibility of debt — against the costs of financial distress. A firm with stable, predictable earnings and a large stock of physical assets can carry more debt safely and benefits from doing so. A firm with volatile earnings and mostly intangible assets faces higher distress risk at any given leverage level and should lean toward equity. The theory predicts that firms gravitate toward a target leverage ratio that maximises firm value.

The pecking order theory (Myers & Majluf, 1984; Myers, 1984) tells a different story. It argues that information asymmetry between company insiders and outside investors creates a hierarchy of financing preference. Managers prefer retained earnings above all — they involve no information disclosure and no cost of adverse selection. When internal funds are insufficient, they turn to debt. Equity issuance is the last resort because it signals to the market that management believes shares are overvalued, triggering a price drop. The implication is that a firm's leverage at any given moment reflects the cumulative history of its financing gaps, not a deliberate optimisation exercise.

The agency cost theory (Jensen & Meckling, 1976) focuses on conflicts of interest: between shareholders and managers over the deployment of free cash flow, and between shareholders and creditors over investment and risk-taking decisions. Debt can actually reduce some agency costs — forcing managers to generate cash to service loans limits their ability to waste it — while creating others, such as the asset substitution problem, where highly leveraged firms have incentives to take on excessive risk at the expense of debtholders.

Nigeria's Construction Sector: Strategic Importance and Financing Pressures

Nigeria's construction industry directly enables economic development through housing delivery, commercial real estate, road and bridge construction, and industrial infrastructure. According to the National Bureau of Statistics, the sector contributed approximately 3.45% to Nigeria's GDP in 2022, a figure that understates its indirect multiplier effects on employment, materials supply chains, and ancillary services.

Financing this sector in Nigeria is structurally difficult. The country's Monetary Policy Rate breached 24% in early 2024, making formal bank credit expensive for firms already operating on margins that rarely exceed single digits on large public infrastructure contracts. The corporate bond market remains thin and largely inaccessible to mid-size construction companies. Foreign currency volatility adds a layer of cost risk for firms importing equipment and materials. Public sector contracts — a major revenue source — are subject to delayed payments and politically driven allocation patterns that create cash flow unpredictability unlike almost any other industry.

These institutional features mean that Nigerian construction companies may not be able to implement the capital structure their underlying economic characteristics would dictate. A firm with strong asset tangibility might be a theoretically ideal debt user, but if lenders face severe information problems and collateral enforcement is unreliable, the firm may still be rationed out of long-term credit markets. Understanding what actually drives leverage in this environment — as opposed to what theory predicts in an ideal market — is the central intellectual contribution of this study.

Students approaching this topic for the first time may find it helpful to review foundational concepts through the undergraduate finance project guides available on ScholarNestHub, which cover capital structure, leverage ratios, and financial analysis techniques relevant to Nigerian corporate environments.

Statement of the Problem

Three overlapping problems motivate this study. The first is a structural financing mismatch observable in the published accounts of listed construction companies on the NGX. These firms routinely finance long-duration projects — spanning one to five years or more — with short-term bank facilities and supplier credit lines. This duration mismatch is not primarily a strategic choice; it reflects the near-total absence of long-term project finance and bond market instruments accessible to Nigerian construction companies at reasonable cost. The practical consequences include recurring refinancing risk, liquidity crises at project transition points, and a chronic inability to bid for the largest infrastructure contracts that require balance sheet depth as a pre-qualification criterion.

The second problem is an empirical gap in sector-specific research. A review of the Nigerian corporate finance literature finds a concentration of capital structure studies in banking, manufacturing, and consumer goods, with the construction and real estate sector largely absent as a focused unit of analysis. Studies that pool all non-financial firms together are of limited use to construction company managers or to policymakers designing sector-specific capital market instruments, because the pooled estimates mask the industry-level dynamics that are precisely what practitioners need to understand.

The third problem is a theoretical ambiguity that has practical consequences. If Nigerian construction companies are trade-off theory followers, their leverage ratios should exhibit mean reversion around an optimal target — which implies that deviations from target are costly and managers should actively correct them. If they are pecking order followers, leverage is largely a passive outcome of earnings variability, and the managerial prescription is simply to maximise retained earnings. These two theories imply very different financial management strategies, yet no study has empirically adjudicated between them for Nigerian construction firms specifically. This study addresses that gap.

Aim and Objectives of the Study

The overarching aim of this study is to identify and evaluate the firm-specific determinants of capital structure among listed construction companies in Nigeria, with a view to establishing which variables exert statistically significant influence on leverage decisions and in what direction.

The specific objectives are:

i.   To determine the effect of asset tangibility on the capital structure of listed construction companies in Nigeria.

ii.  To examine the relationship between profitability and the capital structure of these firms.

iii. To assess how firm size influences capital structure decisions in the sector.

iv.  To evaluate the effect of business risk on observed leverage ratios.

v.   To investigate the relationship between short-term liquidity and capital structure choice.

Research Questions

The following questions guide the empirical investigation:

i.   To what extent does asset tangibility determine the capital structure of listed construction companies in Nigeria?

ii.  What is the direction and magnitude of the relationship between profitability and capital structure in these firms?

iii. How does firm size shape access to, and preference for, debt or equity financing among Nigerian construction companies?

iv.  In what way does business risk — measured by earnings volatility — affect the leverage decisions of listed construction companies?

v.   What is the nature of the relationship between short-term liquidity and capital structure in the Nigerian construction sector?

Null Hypotheses for Empirical Testing:

H01: Asset tangibility has no significant effect on the capital structure of listed construction companies in Nigeria.

H02: Profitability has no significant relationship with capital structure in this sector.

H03: Firm size has no significant influence on capital structure decisions.

H04: Business risk has no significant effect on observed leverage ratios.

H05: Liquidity has no significant relationship with capital structure choice.

Significance of the Study

Contribution to Corporate Finance Theory

Theoretically, this study advances the application of capital structure theory in a developing-economy, sector-specific context. By examining whether trade-off or pecking order logic better explains financing behaviour in an industry characterised by high asset tangibility, volatile contract revenues, and limited long-term debt market access, the study contributes nuance to a theoretical debate that remains empirically unsettled in sub-Saharan African markets. The findings will indicate whether Western-derived capital structure models retain explanatory power when institutional frictions are severe, or whether the Nigerian construction context demands a modified theoretical lens.

Practical Value for Corporate Managers

For chief financial officers and boards of directors in Nigerian construction companies, the study provides an evidence-based map of which internal financial characteristics most reliably predict — and, by implication, should guide — financing choices. Rather than making leverage decisions by convention or by what peers appear to be doing, managers equipped with the findings of this study can make more deliberate, analytically grounded capital structure choices that align with their firm's specific risk and asset profile.

Policy Implications for Capital Market Development

Regulators and capital market development agencies — including the Securities and Exchange Commission (SEC) and the Debt Management Office (DMO) — face ongoing policy decisions about how to deepen Nigeria's long-term debt markets and make them accessible to infrastructure companies. If this study finds, for example, that asset tangibility is the primary enabler of debt access but that the translation of physical assets into loanable collateral is inhibited by weak legal enforcement mechanisms, the policy implication is clear: legal and institutional reform in collateral enforcement is a prerequisite for expanding construction sector leverage capacity.

Researchers and postgraduate students will also find this study valuable as a methodological template for sector-focused capital structure analysis in African markets. The research methodology guides on ScholarNestHub complement this article by walking through panel data methods, variable operationalisation, and regression interpretation techniques in a Nigerian academic context.

Scope of the Study

The study is delimited in three dimensions: sector, time period, and variable selection.

Sector Scope: All companies listed under the construction and real estate segment of the Nigerian Exchange Group (NGX) are included in the population. The principal firms include Julius Berger Nigeria Plc, UACN Property Development Company (UPDC), Arbico Plc, Mixta Real Estate Plc, and several other entities with material construction operations. The focus is deliberately sector-specific to avoid the analytical dilution that occurs when construction firms are pooled with manufacturing or consumer goods companies.

Time Period: The study covers fiscal years 2019 through 2023. This five-year window is long enough to capture meaningful variation in leverage behaviour across different economic conditions — including the COVID-19 shock of 2020, the post-pandemic recovery period, and the 2022–2023 inflation and exchange rate crisis — while remaining current enough that findings are directly relevant to present-day financing decisions.

Variable Scope: The study concentrates on five firm-specific determinants: asset tangibility, profitability, firm size, business risk, and liquidity. Macroeconomic variables such as GDP growth, inflation, and interest rates are contextualised in the background discussion but are not primary independent variables in the empirical model. This constraint allows for a focused analysis of factors that firm management can actively influence, rather than external conditions they must simply navigate.

Operational Definition of Terms

Capital Structure

Capital structure refers to the specific combination of long-term debt, short-term borrowings, retained earnings, and shareholders' equity that a firm uses to finance its total asset base. In this study, it is operationalised as the leverage ratio — most commonly total debt divided by total assets — which provides a standardised measure of a firm's reliance on borrowed funds relative to its overall asset base. A higher ratio indicates greater dependence on debt; a lower ratio signals heavier reliance on equity or retained profits.

Leverage

Leverage quantifies the extent to which a company's operations and assets are financed through debt. Financial leverage amplifies both returns and risks: when a leveraged firm earns a return on assets that exceeds its cost of debt, the surplus accrues to shareholders, magnifying equity returns. When it earns less than its debt cost, losses are similarly amplified. In high-interest-rate environments like Nigeria's, even modest leverage can carry significant risk.

Asset Tangibility

Asset tangibility measures the proportion of a firm's total assets that consist of physical, fixed items — land, buildings, plant, machinery, and vehicles — as opposed to intangible or financial assets. Tangible assets are important for capital structure because they can serve as collateral: a creditor who lends against a factory or a piece of heavy construction equipment has a recoverable asset if the borrower defaults. The greater a firm's asset tangibility, the more debt capacity it theoretically possesses. In construction, tangibility ratios tend to be high given the sector's dependence on physical equipment and real property.

Profitability

Profitability in this study refers to a firm's capacity to generate earnings relative to its asset base or equity, measured by return on assets (ROA) or return on equity (ROE). The relationship between profitability and leverage is theoretically ambiguous: the trade-off theory predicts that profitable firms carry more debt because they have more taxable income to shield; the pecking order theory predicts the opposite — profitable firms accumulate retained earnings and therefore need less debt. Which relationship prevails empirically in the Nigerian construction context is a central empirical question of this study.

Firm Size

Firm size is proxied by the natural logarithm of total assets or total revenue. Large firms are generally presumed to have lower leverage risk because they are more diversified, have longer operating histories, and benefit from better access to capital markets. They also face lower information asymmetry costs because more information about them is publicly available. In Nigeria, where small and mid-size construction firms face severe credit rationing, size may be an especially powerful predictor of leverage capacity.

Business Risk

Business risk captures the volatility of a firm's earnings before interest and taxes (EBIT) over time. High earnings volatility implies that the firm is more likely to experience periods in which it cannot comfortably service debt obligations, raising the probability of financial distress. Both the trade-off theory and the pecking order theory predict that business risk should be negatively related to leverage: risky firms should carry less debt to maintain a buffer against the inevitable bad years.

Liquidity

Liquidity measures a firm's ability to meet short-term financial obligations from short-term assets. It is computed as the current ratio (current assets ÷ current liabilities). A highly liquid firm might use that liquidity as an internal buffer, reducing its need to borrow — consistent with pecking order logic. Alternatively, liquidity might signal financial strength to creditors, facilitating better debt access. For a definitive treatment of financial ratio analysis, the Corporate Finance Institute's resource on financial ratios provides a rigorous methodological reference.

Listed Construction Companies

In this study, the term "listed construction companies" refers specifically to companies whose equity shares are listed and traded on the Nigerian Exchange Group (NGX) and whose principal commercial activities encompass building construction, civil and structural engineering, infrastructure development, housing development, or closely related real estate operations. This definition deliberately excludes companies for which construction is a minor or incidental activity.

Conclusion

Capital structure is not an abstract financial puzzle confined to textbooks and seminar rooms. For the construction companies building Nigeria's roads, homes, and commercial spaces, it is a daily operational reality with direct consequences for project viability, competitive positioning, and long-term survival. The question of what drives leverage in this industry — whether it is the size of a company's physical asset base, its profitability track record, its scale, the volatility of its earnings, or its short-term liquidity position — carries genuine practical weight.

By interrogating these determinants with sector-specific rigour and situating the analysis within competing theoretical frameworks that have been argued about since the 1950s, this study positions itself to deliver findings that go beyond description. The aim is explanation — and, ultimately, prescription: a clearer picture of how Nigerian construction companies can make more deliberate, more defensible, and more value-creating financing decisions in one of the world's most challenging corporate finance environments.

For students and researchers looking to extend this line of inquiry into adjacent areas — whether into public sector contract financing, infrastructure project valuation, or the comparative capital structures of African construction multinationals — the research topic directory on ScholarNestHub offers a curated starting point for identifying gaps in the literature and scoping original contributions.

Frequently Asked Questions (FAQs)

1. What is capital structure in the context of Nigerian construction companies?

Capital structure refers to the mix of debt and equity a construction company uses to finance its assets and operations. In the Nigerian context, it is particularly important because high interest rates, shallow capital markets, and project-specific revenue patterns make optimal financing decisions both difficult and consequential.

2. Why is the construction sector treated separately from other Nigerian industries in capital structure research?

Construction companies have distinctive financial characteristics — long project cycles, high asset tangibility, volatile contract-based revenues, and heavy dependence on government procurement — that differ significantly from manufacturing, banking, or consumer goods companies. Pooling them with other sectors obscures these dynamics and produces results that are not actionable for construction-specific management decisions.

3. What is the trade-off theory, and how does it apply to Nigerian construction firms?

The trade-off theory holds that firms choose leverage by balancing the tax benefits of debt against the costs of financial distress. For Nigerian construction companies, high interest rates reduce the net tax shield benefit, while thin margins increase distress risk, suggesting the theory predicts relatively lower optimal leverage than for firms in more stable, higher-margin industries.

4. What does the pecking order theory predict about construction company leverage in Nigeria?

The pecking order theory predicts that firms prefer internal financing first, then debt, then equity — in that order. For Nigerian construction firms, which often face earnings volatility driven by government payment delays and commodity price swings, the theory predicts that leverage will fluctuate with the firm's ability to generate internal funds: rising in lean years and falling when projects are profitable.

5. How is asset tangibility measured in this study?

Asset tangibility is typically measured as the ratio of fixed assets — land, buildings, plant, machinery, and equipment — to total assets. Construction companies tend to score highly on this measure, which, in theory, should facilitate debt access by providing strong collateral backing for loan facilities.

6. What role does firm size play in determining capital structure?

Larger firms generally have better access to capital markets, face lower borrowing costs due to established credit histories, and carry lower perceived information risk. In Nigeria, where credit rationing is common and smaller firms often cannot access formal long-term credit at all, size may be an especially powerful predictor of a company's capacity to leverage its balance sheet.

7. Why does business risk negatively affect leverage in theory?

Higher earnings volatility means a greater probability that a firm will be unable to service its debt in a bad year. Lenders price this risk through higher interest rates or simply refuse to extend credit beyond a certain debt level. Firms themselves, facing this prospect, may voluntarily limit their leverage to preserve financial flexibility and avoid triggering covenants or technical default.

8. Which construction companies are listed on the Nigerian Exchange Group?

The NGX's construction and real estate sector includes companies such as Julius Berger Nigeria Plc, UACN Property Development Company (UPDC), Arbico Plc, Mixta Real Estate Plc, and others with material construction or property development operations. The total number of listed entities in this category is small, which reflects the broader challenge of weak equity market participation among Nigerian construction businesses.

9. How does liquidity relate to a construction firm's capital structure decision?

A liquid firm — one with a high ratio of current assets to current liabilities — has an internal buffer that reduces its immediate need to borrow. According to pecking order logic, this liquidity substitutes for debt. However, liquidity can also signal financial strength to lenders, potentially expanding a firm's borrowing capacity. Whether the net effect on leverage is positive or negative is an empirical question this study is designed to answer.

10. What are the practical takeaways from this research for construction company CFOs?

The study provides CFOs with an evidence-based view of which firm characteristics most strongly predict their peers' leverage decisions, enabling benchmarking and more deliberate capital structure management. Specifically, it helps answer questions such as: Does investing in more tangible assets meaningfully expand our debt capacity? Does our current size limit our access to long-term financing? And are we carrying more risk than lenders and investors will comfortably tolerate in the current rate environment?