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Series 79: Collection, Analysis & Evaluation of Data
Series 79 practice questionmediumWACC and Tax Rate

If the corporate tax rate increases, what is the expected impact on the WACC, assuming the capital structure is unchanged?

  1. AWACC increases because cost of equity rises.
  2. BWACC increases because interest expense rises.
  3. CWACC remains the same because tax rates do not affect it.
  4. DWACC decreases due to a greater tax shield on debt.✓ Correct answer
Explanation

Why DWACC decreases due to a greater tax shield on debt.

Higher tax rates increase the benefit of the interest tax shield, lowering the after-tax cost of debt and thereby reducing WACC. Interest expense itself does not rise, and the cost of equity is not directly affected.

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