The WACC of National Grid PLC (NG.L) is 6.8%.
| Range | Selected | |
| Cost of equity | 8.40% - 10.60% | 9.50% |
| Tax rate | 26.10% - 27.30% | 26.70% |
| Cost of debt | 4.00% - 7.00% | 5.50% |
| WACC | 5.7% - 7.9% | 6.8% |
| Category | Low | High |
| Long-term bond rate | 4.0% | 4.5% |
| Equity market risk premium | 6.0% | 7.0% |
| Adjusted beta | 0.74 | 0.8 |
| Additional risk adjustments | 0.0% | 0.5% |
| Cost of equity | 8.40% | 10.60% |
| Tax rate | 26.10% | 27.30% |
| Debt/Equity ratio | 0.99 | 0.99 |
| Cost of debt | 4.00% | 7.00% |
| After-tax WACC | 5.7% | 7.9% |
| Selected WACC | 6.8% | |