In: Finance
A firm's capital structure is made up of equity and debt. The cost of equity is the dividend payments to shareholders, and the cost of debt is the interest payment to bondholders. When a company issues debt, not only does it promise to repay the principal amount, it also promises to compensate its bondholders by making interest payments, known as coupon payments, to them annually. The interest rate paid on these debt instruments represents the cost of borrowing to the issuer.
The sum of the cost of equity financing and debt financing is a company's cost of capital. The cost of capital represents the minimum return that a company must earn on its capital to satisfy its shareholders, creditors, and other providers of capital. A company's investment decisions relating to new projects and operations should always generate returns greater than the cost of capital. If returns on its capital expenditures are below its cost of capital, then the firm is not generating positive earnings for its investors. In this case, the company may need to re-evaluate and re-balance its capital structure.