Answer:
10%
Step-by-step explanation:
Given that,
Interest at last year debt = 8%
Current year cost of debt = 25% higher
Firms paid for debt last year = 10%
Firms paid for debt in current year = 12.50%
Kd - cost of debt
Yield = Interest at last year debt × (1 + increase in cost of debt)
= 8% × (1 + 0.25)
= 8% × 1.25
= 10%
Kd = Yield (1 – T)
Kd = 10% (1 – 0)
= 10% (1)
= 10%
Therefore, after tax cost of debt would be 10%.