WACC Discount Rate Calculator
Calculate the Weighted Average Cost of Capital (WACC) to use as your discount rate for NPV analysis.
Calculated Discount Rate (WACC)
How to Calculate the Discount Rate for NPV
In financial modeling, the "Discount Rate" represents the hurdle rate a project must clear to be considered viable. For most corporate finance applications, the most accurate discount rate for Net Present Value (NPV) is the Weighted Average Cost of Capital (WACC).
The WACC accounts for the proportional cost of each type of capital (equity and debt) that a company uses to fund its operations. Because interest on debt is often tax-deductible, the formula adjusts the cost of debt to reflect the "after-tax" cost.
The WACC Formula
Where:
- E = Market value of the firm's equity
- D = Market value of the firm's debt
- V = Total value of capital (E + D)
- Re = Cost of equity
- Rd = Cost of debt
- T = Corporate tax rate
Practical Example
Suppose a company has the following financial profile:
- Market Equity: $600,000
- Market Debt: $400,000 (Total Value = $1,000,000)
- Cost of Equity: 12%
- Cost of Debt: 6%
- Tax Rate: 25%
Using the formula: (0.6 × 0.12) + [(0.4 × 0.06) × (1 – 0.25)] = 0.072 + 0.018 = 9.0%. This 9% is the discount rate you would use to calculate the NPV of future cash flows.
Why the Discount Rate Matters
The discount rate accounts for the time value of money and the risk associated with future cash flows. A higher discount rate results in a lower NPV, making it harder for a project to be approved. Conversely, a lower discount rate increases the NPV, suggesting the project creates more value for the firm.