Indicative dates for key milestones in the decision-making process
| Milestone | Date |
| Transgrid submits a compliant revenue proposal | 22 April 2026 |
| AER publish revenue proposal and open submissions | 24 April 2026 |
| Submissions on revenue proposal close | 18 May 2026 |
| AER publishes Preliminary position paper and open submissions | 30 June 2026 |
| Public forum on the Preliminary position paper | 16 July 2026 |
| Submissions close on the Preliminary position paper | 28 July 2026 |
| AER makes final decision | 23 September 2026 |
| AER publishes revenue determination | 30 September 2026 |