Tax deduction doubts Forums › Ask ACCA Tutor Forums › Ask the Tutor ACCA AFM Exams › Tax deduction doubts This topic has 0 replies, 1 voice, and was last updated 7 years ago by ajithgthakkan. Viewing 1 post (of 1 total) Author Posts July 31, 2018 at 8:36 pm #465467 ajithgthakkanMember Topics: 3Replies: 1☆ Sir, 1) Why do we deduct tax from the cost of debt in WACC when we have already found out the cost of debt using the after tax interest? 2) Why do we deduct tax from the market value of debt in the ungearing of beta calculation? Ve/(ve + Vd(1-T)) * beta Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In