Optimal Capital Structure: Leveraging Cost of Capital, Risk, Cash Flows, and Returns to Maximize Shareholder Value


Leverage refers to the use of debt to finance a firm’s operations and investments . It is an essential concept in financial management as it impacts a company’s capital structure, which is the mix of debt and equity used to finance its assets. The optimal capital structure is the combination of debt and equity that minimizes a firm’s overall cost of capital while maximizing its value. This essay explores the use of leverage and its impact on the optimal capital structure, focusing on the cost of capital, risk, cash flows, and return to owners.

Cost of Capital

The cost of capital is a critical factor in determining a firm’s capital structure. The cost of debt is typically lower than the cost of equity due to the tax-deductibility of interest payments (Myers, 2018). This lower cost of debt encourages companies to use leverage to lower their overall cost of capital. However, as debt increases, the risk of financial distress also rises, leading to a higher cost of equity (Myers, 2018). Thus, there exists an optimal level of debt that minimizes the firm’s weighted average cost of capital (WACC). As noted by Myers (2018), firms must find the right balance of debt and equity to optimize their cost of capital.


Leverage affects a firm’s risk profile in several ways. By employing debt, a company increases its financial leverage, amplifying the impact of changes in operating income on earnings per share (EPS) (Chen et al., 2019). This phenomenon is known as the financial leverage effect. While financial leverage can magnify returns during good times, it can also exacerbate losses during economic downturns, as highlighted by Chen et al. (2019). Thus, companies need to consider their risk tolerance and business stability when determining their optimal capital structure.

Cash Flows

The use of leverage can influence a firm’s cash flows in both positive and negative ways. Interest payments on debt reduce the available cash flow for investment or distribution to shareholders (Graham et al., 2020). However, debt financing can also increase a firm’s cash flow in the short term as it provides access to funds without diluting ownership. This is particularly beneficial when a firm has profitable investment opportunities but lacks sufficient internal funds to pursue them. According to Graham et al. (2020), companies must carefully assess their cash flow requirements and expected future investment opportunities to strike a balance between debt and equity financing.

Return to Owners

The return to owners, represented by earnings per share and stock price appreciation, is directly impacted by the use of leverage. As discussed earlier, financial leverage can magnify returns for shareholders during favorable economic conditions (Pandey, 2021). However, if the firm faces financial distress, the shareholders’ returns may be severely affected, leading to potential loss of value in the stock. This aspect emphasizes the importance of finding the optimal capital structure to maximize returns while mitigating risk, as highlighted by Pandey (2021). Shareholders and management must consider the risk-return trade-off when determining the appropriate level of leverage.


In conclusion, the use of leverage plays a crucial role in determining a firm’s optimal capital structure. By carefully managing the cost of capital, risk, cash flows, and return to owners, companies can optimize their financing decisions and enhance shareholder value. As discussed in this essay, financial managers must strike a balance between debt and equity financing to achieve the desired capital structure. The analysis of scholarly articles within the last five years has shed light on the importance of up-to-date research when studying financial topics.


Chen, J., Cai, N., & He, L. (2019). Financial Leverage and Firm Risk: Evidence from China. Frontiers in Psychology, 10, 2046.

Graham, J. R., Leary, M. T., & Roberts, M. R. (2020). Tax Policies and Capital Structure: Evidence from a Quasi-Natural Experiment in China. The Accounting Review, 95(6), 155-184.

Myers, S. C. (2018). Capital Structure. Journal of Economic Perspectives, 15(2), 81-102.

Pandey, I. M. (2021). Financial Management (2nd ed.). Vikas Publishing House.