The WACC of Bouygues SA (EN.PA) is 5.7%.
| Range | Selected | |
| Cost of equity | 8.20% - 10.50% | 9.35% |
| Tax rate | 30.50% - 32.00% | 31.25% |
| Cost of debt | 4.00% - 4.50% | 4.25% |
| WACC | 5.1% - 6.2% | 5.7% |
| Category | Low | High |
| Long-term bond rate | 3.0% | 3.5% |
| Equity market risk premium | 5.8% | 6.8% |
| Adjusted beta | 0.9 | 0.96 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 8.20% | 10.50% |
| Tax rate | 30.50% | 32.00% |
| Debt/Equity ratio | 1.37 | 1.37 |
| Cost of debt | 4.00% | 4.50% |
| After-tax WACC | 5.1% | 6.2% |
| Selected WACC | 5.7% | |