The WACC of Unitil Corp (UTL) is 5.5%.
| Range | Selected | |
| Cost of equity | 5.60% - 7.90% | 6.75% |
| Tax rate | 23.30% - 23.90% | 23.60% |
| Cost of debt | 4.70% - 5.10% | 4.90% |
| WACC | 4.8% - 6.2% | 5.5% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.39 | 0.54 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 5.60% | 7.90% |
| Tax rate | 23.30% | 23.90% |
| Debt/Equity ratio | 0.72 | 0.72 |
| Cost of debt | 4.70% | 5.10% |
| After-tax WACC | 4.8% | 6.2% |
| Selected WACC | 5.5% | |