Capital Structure

What Is Capital Structure?

Capital structure describes how a company pays for its assets. Businesses raise money in two broad ways. They can borrow, which creates debt financing that must be repaid with interest, or they can sell ownership, which creates equity financing that gives investors a share of the company's profits and assets. The combination of these sources is the company's capital structure. Analysts often describe it with a ratio such as debt-to-equity ratio, which compares how much a firm owes to how much its shareholders have invested.

Why the Mix Matters

Each funding source has trade-offs. Debt usually has a lower cost than equity because lenders accept a fixed return and are paid before shareholders. Interest payments are also often tax-deductible, which can make borrowing more attractive. However, debt brings fixed obligations. If a company's earnings fall, it still has to make its interest payments, and high borrowing can raise the risk of financial distress or bankruptcy. Equity has no fixed repayment requirement, so it adds flexibility, but it dilutes existing owners and is generally more expensive over time because shareholders expect higher returns for taking on more risk.

How Investors Use It

Investors examine capital structure to judge financial risk and resilience. A company with little debt may have room to borrow during a downturn, while one with heavy debt may be more vulnerable to rising interest rates or falling sales. Metrics such as interest coverage ratio help show whether operating profits can comfortably cover interest costs. The ideal mix varies widely by industry. Utilities and real estate firms often carry more debt because their cash flows are steady and predictable, while young technology companies typically rely more on equity.

Example

Suppose a company has $40 million in debt and $60 million in shareholder equity. Its capital structure is 40% debt and 60% equity, and its debt-to-equity ratio is about 0.67. Because the figures are illustrative, the example only shows how the proportions are read, not how any real firm is managed.