The WACC of Merck & Co Inc (MRK) is 5.9%.
| Range | Selected | |
| Cost of equity | 5.40% - 7.20% | 6.30% |
| Tax rate | 17.80% - 22.20% | 20.00% |
| Cost of debt | 4.00% - 4.50% | 4.25% |
| WACC | 5.1% - 6.8% | 5.9% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.32 | 0.42 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 5.40% | 7.20% |
| Tax rate | 17.80% | 22.20% |
| Debt/Equity ratio | 0.14 | 0.14 |
| Cost of debt | 4.00% | 4.50% |
| After-tax WACC | 5.1% | 6.8% |
| Selected WACC | 5.9% | |