The WACC of White Mountains Insurance Group Ltd (WTM) is 7.4%.
| Range | Selected | |
| Cost of equity | 6.70% - 8.70% | 7.70% |
| Tax rate | 5.60% - 10.80% | 8.20% |
| Cost of debt | 5.00% - 5.00% | 5.00% |
| WACC | 6.5% - 8.3% | 7.4% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.61 | 0.69 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 6.70% | 8.70% |
| Tax rate | 5.60% | 10.80% |
| Debt/Equity ratio | 0.11 | 0.11 |
| Cost of debt | 5.00% | 5.00% |
| After-tax WACC | 6.5% | 8.3% |
| Selected WACC | 7.4% | |