ESTIMATING THE WEIGHTED AVERAGE COST OF CAPITAL
Input cells are in yellow.
Comparable Companies
Firm 1Firm 2Firm 3Average
DATA Amount of equity200200300
Amount of debt100200200
Tax rate40%35%38%
Equity beta 1.10 1.250.90
RESULT1+ (1-T)D/E 1.30 1.65 1.41
Unlevered equity beta0.850.760.640.75
Project or Acquisition
DATA% Debt40%
% Equity60%
Tax rate40%
RESULT1+ (1-T)D/E 1.40
Unlevered project beta0.75 = average of unlevered equity betas of comparable firms
Project equity beta 1.05
DATA Risk-free rate 6.00% = yield on long-term Treasury bonds
Market risk premium7.40% = historical average excess return of S&P 500
RESULT Project equity beta 1.05
Market risk premium7.40%
Equity risk premium7.74%
Plus risk-free rate 6.00%
Cost of equity13.74%
Note: The estimate of the market risk premium is the arithmetic average from 1927-1997, based on
the Ibbotson Associates "Stocks, Bonds, Bills and Inflation" data.
DATA Cost of debt9.0%
RESULT Weighted
Weights Cost
After-tax cost of debt 5.4%40.0% 2.2%
Cost of equity13.7%
Weighted average cost of capital