Explanation : The cost of capital is the minimum required
rate of return which firm must earn on its
funds in order to satisfy the expectation of its
supplier of funds. If the return from capital
budgeting proposals is more than cost of
capital then difference will be added to wealth
of shareholders.
The concept of cost of capital has a role to
play in capital budgeting as well as in
finalizing the capital structure for the firm.
The cost of capital depends upon the risk free
interest rate and risk premium, which depends
upon the risk of investment and risk of firm.
The cost of capital may be defined in terms of
(1) explicit cost, which the firm pays to
supplier, and (2) implicit cost. i.e., opportunity
cost of funds to firm. The cost of capital is
calculated in after tax terms.
Different sources of funds available to firm
may be grouped into Debt, Preference share
capital, Equity share capital and retained
earning and these sources have their specific
cost of capital. However the overall cost of
capital of the firm may be ascertained as the
weighted average of these specific costs of
capital.