The WACC of Costco Wholesale Corp (COST) is 7.5%.
| Range | Selected | |
| Cost of equity | 6.60% - 8.60% | 7.60% |
| Tax rate | 24.40% - 24.40% | 24.40% |
| Cost of debt | 4.00% - 4.50% | 4.25% |
| WACC | 6.5% - 8.5% | 7.5% |
| Category | Low | High |
| Long-term bond rate | 3.9% | 4.4% |
| Equity market risk premium | 4.6% | 5.6% |
| Adjusted beta | 0.6 | 0.67 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 6.60% | 8.60% |
| Tax rate | 24.40% | 24.40% |
| Debt/Equity ratio | 0.02 | 0.02 |
| Cost of debt | 4.00% | 4.50% |
| After-tax WACC | 6.5% | 8.5% |
| Selected WACC | 7.5% | |