The WACC of Marathon Petroleum Corp (MPC) is 7.3%.
| Range | Selected | |
| Cost of equity | 7.00% - 11.20% | 9.10% |
| Tax rate | 19.20% - 20.90% | 20.05% |
| Cost of debt | 4.20% - 4.70% | 4.45% |
| WACC | 5.9% - 8.8% | 7.3% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.68 | 1.13 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 7.00% | 11.20% |
| Tax rate | 19.20% | 20.90% |
| Debt/Equity ratio | 0.47 | 0.47 |
| Cost of debt | 4.20% | 4.70% |
| After-tax WACC | 5.9% | 8.8% |
| Selected WACC | 7.3% | |