The WACC of Trinseo SA (TSE) is 7.8%.
| Range | Selected | |
| Cost of equity | 59.80% - 83.30% | 71.55% |
| Tax rate | 12.00% - 15.70% | 13.85% |
| Cost of debt | 5.10% - 7.00% | 6.05% |
| WACC | 6.6% - 8.9% | 7.8% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 12.15 | 14 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 59.80% | 83.30% |
| Tax rate | 12.00% | 15.70% |
| Debt/Equity ratio | 24.67 | 24.67 |
| Cost of debt | 5.10% | 7.00% |
| After-tax WACC | 6.6% | 8.9% |
| Selected WACC | 7.8% | |