The WACC of GlaxoSmithKline PLC (GSK.L) is 8.5%.
| Range | Selected | |
| Cost of equity | 8.80% - 11.30% | 10.05% |
| Tax rate | 8.40% - 12.50% | 10.45% |
| Cost of debt | 4.00% - 4.70% | 4.35% |
| WACC | 7.5% - 9.5% | 8.5% |
| Category | Low | High |
| Long-term bond rate | 4.0% | 4.5% |
| Equity market risk premium | 6.0% | 7.0% |
| Adjusted beta | 0.8 | 0.91 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 8.80% | 11.30% |
| Tax rate | 8.40% | 12.50% |
| Debt/Equity ratio | 0.33 | 0.33 |
| Cost of debt | 4.00% | 4.70% |
| After-tax WACC | 7.5% | 9.5% |
| Selected WACC | 8.5% | |