The WACC of Southern Co (SO) is 4.9%.
| Range | Selected | |
| Cost of equity | 4.80% - 6.20% | 5.50% |
| Tax rate | 11.30% - 14.40% | 12.85% |
| Cost of debt | 4.00% - 4.90% | 4.45% |
| WACC | 4.3% - 5.4% | 4.9% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.21 | 0.23 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 4.80% | 6.20% |
| Tax rate | 11.30% | 14.40% |
| Debt/Equity ratio | 0.67 | 0.67 |
| Cost of debt | 4.00% | 4.90% |
| After-tax WACC | 4.3% | 5.4% |
| Selected WACC | 4.9% | |