The WACC of Summit Materials Inc (SUM) is 9.0%.
| Range | Selected | |
| Cost of equity | 8.10% - 12.30% | 10.20% |
| Tax rate | 22.20% - 22.90% | 22.55% |
| Cost of debt | 5.20% - 6.10% | 5.65% |
| WACC | 7.2% - 10.7% | 9.0% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.91 | 1.32 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 8.10% | 12.30% |
| Tax rate | 22.20% | 22.90% |
| Debt/Equity ratio | 0.26 | 0.26 |
| Cost of debt | 5.20% | 6.10% |
| After-tax WACC | 7.2% | 10.7% |
| Selected WACC | 9.0% | |