To sate my curiosity, I redid Example 1 with the interest rate at 13.78% and the final NPV I got was -160. obviously that came from rounding error. Just wanted to post it since I was expecting you to do it just to prove it really did make NPV 0

Hi all, I have a question related to the impact of Working capital interest expense on the NPV calculation. From what I’ve learned, normally we will use the post-tax interest rate of long-term liabilities to calculate the WACC which will be used to discount the cashflow to generate the NPV, and the interest expense will be excluded from the cashflow calculation. However, I don’t know what is the treatment of interest expense on the working capital. In ACCA test kits, normally they ignore the interest expense which we have to pay for acquiring additional WC, they neither include such expense in cashflow calculation nor the WACC. What if the working capital contributes a large part of finance needed, a commodity trading company for example. What should we do? Put the interest expense to cashflow calculation and remove it from WACC or should we use it to calculate WACC? If the latter option is selected, how do we calculate WACC since the additional WC may vary over the time.

kamo7293 says

To sate my curiosity, I redid Example 1 with the interest rate at 13.78% and the final NPV I got was -160. obviously that came from rounding error. Just wanted to post it since I was expecting you to do it just to prove it really did make NPV 0

John Moffat says

🙂

Hiền says

Hi all, I have a question related to the impact of Working capital interest expense on the NPV calculation. From what I’ve learned, normally we will use the post-tax interest rate of long-term liabilities to calculate the WACC which will be used to discount the cashflow to generate the NPV, and the interest expense will be excluded from the cashflow calculation. However, I don’t know what is the treatment of interest expense on the working capital. In ACCA test kits, normally they ignore the interest expense which we have to pay for acquiring additional WC, they neither include such expense in cashflow calculation nor the WACC. What if the working capital contributes a large part of finance needed, a commodity trading company for example. What should we do? Put the interest expense to cashflow calculation and remove it from WACC or should we use it to calculate WACC? If the latter option is selected, how do we calculate WACC since the additional WC may vary over the time.

Your answer is greatly appreciated.

John Moffat says

Calculation of the WACC is not in the syllabus for Paper MA !! It is not examined until later papers.