The WACC of Costco Wholesale Corp (COST) is 7.1%.
| Range | Selected | |
| Cost of equity | 5.90% - 8.50% | 7.20% |
| Tax rate | 24.50% - 24.70% | 24.60% |
| Cost of debt | 4.00% - 4.60% | 4.30% |
| WACC | 5.9% - 8.4% | 7.1% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.45 | 0.64 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 5.90% | 8.50% |
| Tax rate | 24.50% | 24.70% |
| Debt/Equity ratio | 0.02 | 0.02 |
| Cost of debt | 4.00% | 4.60% |
| After-tax WACC | 5.9% | 8.4% |
| Selected WACC | 7.1% | |