The WACC of Southern Co (SO) is 5.9%.
| Range | Selected | |
| Cost of equity | 6.40% - 8.10% | 7.25% |
| Tax rate | 11.30% - 14.40% | 12.85% |
| Cost of debt | 4.00% - 5.20% | 4.60% |
| WACC | 5.2% - 6.6% | 5.9% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.55 | 0.57 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 6.40% | 8.10% |
| Tax rate | 11.30% | 14.40% |
| Debt/Equity ratio | 0.7 | 0.7 |
| Cost of debt | 4.00% | 5.20% |
| After-tax WACC | 5.2% | 6.6% |
| Selected WACC | 5.9% | |