The WACC of NorthWestern Corp (NWE) is 6.6%.
| Range | Selected | |
| Cost of equity | 5.70% - 7.90% | 6.80% |
| Tax rate | 2.00% - 4.30% | 3.15% |
| Cost of debt | 4.00% - 9.10% | 6.55% |
| WACC | 4.9% - 8.3% | 6.6% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.39 | 0.55 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 5.70% | 7.90% |
| Tax rate | 2.00% | 4.30% |
| Debt/Equity ratio | 0.85 | 0.85 |
| Cost of debt | 4.00% | 9.10% |
| After-tax WACC | 4.9% | 8.3% |
| Selected WACC | 6.6% | |