The WACC of Costain Group PLC (COST.L) is 7.7%.
| Range | Selected | |
| Cost of equity | 6.90% - 9.10% | 8.00% |
| Tax rate | 25.50% - 39.50% | 32.50% |
| Cost of debt | 4.70% - 6.20% | 5.45% |
| WACC | 6.7% - 8.6% | 7.7% |
| Category | Low | High |
| Long-term bond rate | 4.0% | 4.5% |
| Equity market risk premium | 6.0% | 7.0% |
| Adjusted beta | 0.49 | 0.58 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 6.90% | 9.10% |
| Tax rate | 25.50% | 39.50% |
| Debt/Equity ratio | 0.09 | 0.09 |
| Cost of debt | 4.70% | 6.20% |
| After-tax WACC | 6.7% | 8.6% |
| Selected WACC | 7.7% | |