Answer:
After tax cost of debt is 4.85%
Explanation:
The starting to computing the after tax cost of debt is to calculate the yield to maturity on the bond .
The yield to maturity on the bond can be computed using the rate formula in excel.
=rate(nper,pmt,-pv,fv)
nper is the time to maturity of 30 years multiplied by 2 since the bond is paying interest on semi-annual basis
pmt is the semi-annual interest receivable by investor which 6.0%/2*$1000=$30
pv is the current market price :$1000*98% =$980 (100-2%),1% deducted for discount,1% for issue cost
fv is the face value of $1000
=rate(60,30,-980,1000)
rate=3.07%
The 3.07% is the semi-annual YTM, whereas the annual YTM 3.07%
*2=6.14%
After tax cost of debt=YTM*(1-0.21)
=6.14%*(1-0.21)
=4.85%