The WACC of Columbia Banking System Inc (COLB) is 8.8%.
| Range | Selected | |
| Cost of equity | 8.20% - 10.70% | 9.45% |
| Tax rate | 20.50% - 21.10% | 20.80% |
| Cost of debt | 5.00% - 5.00% | 5.00% |
| WACC | 7.7% - 9.9% | 8.8% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.93 | 1.04 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 8.20% | 10.70% |
| Tax rate | 20.50% | 21.10% |
| Debt/Equity ratio | 0.14 | 0.14 |
| Cost of debt | 5.00% | 5.00% |
| After-tax WACC | 7.7% | 9.9% |
| Selected WACC | 8.8% | |