Answer:
Step-by-step explanation:
The pretax cost of debt is the YTM of the bond. Using a financial calculator, input the following to calculate annual interest rate; YTM.
note: adjust the time and recurring payment to semiannual basis.
Maturity of the bond ; N = 25*2 = 50
Face value of the bond ; FV = 1,000
Price of the bond; PV = -( 1.07 * 1000) = -1,070
Semi-annual payment; PMT = (6%/2)*1,000 = 30
Compute semiannual interest rate ; CPT I/Y = 2.741%
Convert the semiannual rate to annual rate(YTM) = 2.741% * 2 = 5.482%
Therefore, pretax cost of debt is 5.48%
Since interest paid on debt has tax benefits through interest tax shield, the after tax cost of debt can be calculated. It is basically solved by adjusting the pretax cost of debt to incorporate this tax benefit. The formula is as follows;
Aftertax cost of debt = Pretax cost of debt (1-tax)
Aftertax cost of debt = 0.0548(1-0.21) = 0.0433 or 4.33%