Assume that the user cost of capital (C) is simply



where r is the after tax rate of return, ? is the depreciation rate, ? is the corporate tax rate and,

r is the individual tax rate. Now assume further that the after-tax rate of return is 10 percent

and the economic depreciation rate is 2 percent. The firm faces corporate taxes of 35 percent

with an individual tax rate of 25 percent. Suppose that we now know that the present value of

depreciation allowances is 0.20. In addition, there is an investment tax credit of 0.10. What

effect does this new information have on the user cost of capital?


Solving for C yields C = (0.10 + 0.02)/(1 - 0.35)(1 - 0.25) = 0.2462 or 24.62%. Then multiply it

by (1 - 0.20 - 0.10). In the presence of depreciation allowance and investment tax credit, the

cost of capital can be calculated as:



where ? is the depreciation allowance and k is the investment tax credit. Therefore, we have

0.2462(1 - 0.20 - 0.10) = 0.1723 or 17.23%. The user cost of capital is now lowered.

Economics

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