The WACC of Merck & Co Inc (MRK) is 6.4%.
| Range | Selected | |
| Cost of equity | 5.90% - 7.50% | 6.70% |
| Tax rate | 17.80% - 22.20% | 20.00% |
| Cost of debt | 4.00% - 5.20% | 4.60% |
| WACC | 5.7% - 7.2% | 6.4% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.45 | 0.47 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 5.90% | 7.50% |
| Tax rate | 17.80% | 22.20% |
| Debt/Equity ratio | 0.11 | 0.11 |
| Cost of debt | 4.00% | 5.20% |
| After-tax WACC | 5.7% | 7.2% |
| Selected WACC | 6.4% | |