@pramodguru Thank you so much for your valuable feedback.
Conceptually, cost of capital is nothing but the minimum amount of returns that the various parties who provide capital to the company, such as equity shareholders, preference shareholders and lending banks, expect from the company, in return for the funds provided by them.
In pure financial parlance, the cost of capital is also called the Weighted Average Cost Of Capital (WACC). It is arrived at by multiplying the proportional weight of each component of capital in the total capital structure by the cost of each individual component.
In my example I had assumed a rate of 10% as the cost of capital for ease of calculation, but it is also possible to calculate the exact cost of capital rates.
This will be made clear by the following example.
Let us assume that Graphite India Limited has 70 crore of equity capital, in return for which shareholders expect an annual dividend of 7%, and 30 crore of debt, in return for which the bank expects 6% interest per annum.
This reveals that Graphite India has a total capital of 100 crore, in the ratio of 70% equity and 30% debt. The equity costs 7% because that is the dividend return expected by shareholders, and the debt costs 6%, because that is the amount of interest expected by the bank.
Now to come up with an overall weighted average cost of capital we follow the following calculation.
Weighted average cost = Ratio x Cost of individual component
Weighted average cost of equity = 70% x 7% = 4.9%
Weighted average cost of debt = 30% x 6% = 1.8%
Therefore, WACC = 4.9% + 1.8% = 6.7%
Hope you find this explanation helpful.