Overview

Initiation
Proposal

Revenue Proposal

On 22 April 2026, Transgrid submitted a compliant hybrid revenue proposal for the System Strength Project for a proposed regulatory period commencing 1 October 2026 and ending 30 September 2031 (2026–31). 

The proposal and supporting materials, as well as stakeholder submissions, are provided below.

Transgrid - System Strength Project 2026-31 - Revenue Proposal - April 2026
PDF (5.02MB) View details

Authors
Transgrid (T)
Document

Transgrid - A.2 - System Strength Project 2026-31 - Revenue Proposal Overview - April 2026
PDF (1.02MB) View details

Authors
Transgrid (T)
Document

Confidentiality claims

Transgrid - A.8 - System Strength Project 2026-31 - Confidentiality (Non-disclosure) Claims - April 2026
PDF (1.01MB) View details

Authors
Transgrid (T)
Document

Information notice response

Transgrid - A.6 - System Strength Project 2026-31 - Information notice response - June Year (financial year)(Workbook 1) - April 2026
XLSX (151.51KB) View details

Authors
Transgrid (T)
Document

Transgrid - A.7 - System Strength Project 2026-31 - Information notice response - September Year (regulatory year)(Workbook 2) - April 2026
XLSX (154.74KB) View details

Authors
Transgrid (T)
Document

Transgrid - A.9 - System Strength Project 2026-31 - Statutory Declaration - April 2026
PDF (125.6KB) View details

Authors
Transgrid (T)
Document

Transgrid - A.10 - System Strength Project 2026-31 - Key Capex and Opex Assumptions Certification - April 2026
PDF (216.02KB) View details

Authors
Transgrid (T)
Document

Transgrid - PwC - S.4 - System Strength Project 2026-31 - Audit Report - April 2026
PDF (269.08KB) View details

Authors
Transgrid (T)
Price Waterhouse Coopers (PWC)
Document

Models

Transgrid - M.1 - System Strength Project 2026-31 - Capex Forecast Model - April 2026
XLSM (605.01KB) View details

Authors
Transgrid (T)
Document

Transgrid - M.2 - System Strength Project 2026-31 - Labour and Overhead Cost Model - April 2026
XLSX (1.54MB) View details

Authors
Transgrid (T)
Document

Transgrid - M.3 - System Strength Project 2026-31 - Opex Forecast Model - April 2026
XLSM (412.14KB) View details

Authors
Transgrid (T)
Document

Transgrid - M.4 - System Strength Project 2026-31 - Direct Non-Labour Model - April 2026
XLSX (628.24KB) View details

Authors
Transgrid (T)
Document

Transgrid - M.5 - System Strength Project 2026-31 - Rate of Return Model - April 2026
XLSX (68.06KB) View details

Authors
Transgrid (T)
Document

Transgrid - M.6 - System Strength Project 2026-31 - EII Post Tax Revenue Model (PTRM) - April 2026
XLSM (1.96MB) View details

Authors
Transgrid (T)
Document

Transgrid - Oxford Economics - M.7 - System Strength Project 2026-31 - Escalator Summary Table - April 2026
XLSX (34.37KB) View details

Authors
Transgrid (T)
Document

Supporting information - Attachments

Transgrid - A.3 - System Strength Project 2026-31 - Non-Contestable Labour and Indirect Capex Forecasting Methodology - April 2026
PDF (1.48MB) View details

Authors
Transgrid (T)
Document

Transgrid - A.4 - System Strength Project 2026-31 - Non-Contestable Opex Forecasting Methodology - April 2026
PDF (1.14MB) View details

Authors
Transgrid (T)
Document

Transgrid - A.5 - System Strength Project 2026-31 - Non-Contestable Risk Cost Allowance Forecasting Methodology - April 2026
PDF (1.37MB) View details

Authors
Transgrid (T)
Document

Transgrid - A.11 - System Strength Project 2026-31 - Cost Allocation Methodology - May 2023
PDF (1.06MB) View details

Authors
Transgrid (T)
Document

Transgrid - A.12 - System Strength Project 2026-31 - Expenditure Capitalisation Policy - April 2025
PDF (816.88KB) View details

Authors
Transgrid (T)
Document

Transgrid - DCCEEW - A.14 - System Strength Project 2026-31 - Supporting letter - March 2026
PDF (157.1KB) View details

Authors
Transgrid (T)
DCCEEW
Document

Transgrid - North Projects - S.1 - System Strength Project 2026-31 - Project Owner’s Cost Assessment Report - March 2026
PDF (1.92MB) View details

Authors
Transgrid (T)
Document

Transgrid - Marsh - S.3 - System Strength Project 2026-31 - Insurance Report - February 2026
PDF (672.63KB) View details

Authors
Transgrid (T)
MARSH
Document

Transgrid - Oxford Economics - S.5 - System Strength Project 2026-31 - Labour Escalation Forecasts to 2031 - February 2026
PDF (939.55KB) View details

Authors
Transgrid (T)
BIS Oxford Economics
Document

Transgrid - GHD - S.6 - System Strength Project 2026-31 - Accelerated Syncon Project - March 2026
PDF (1.33MB) View details

Authors
Transgrid (T)
GHD
Document

Submissions

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Stakeholders were invited to make submissions on Transgrid’s 2026–31 hybrid revenue proposal for the System Strength Project by 18 May 2026.

Consumer Challenge Panel (CCP) Sub-Panel 35 - Submission - System Strength Project - 2026-31 Revenue Proposal - May 2026
PDF (252.02KB) View details

Authors
Consumer Challenge Panel
Document

Centre for Smart Power and Energy Research (CSPER) Deakin University - Submission - System Strength Project - 2026-31 Revenue Proposal - May 2026
PDF (1.78MB) View details

Document

Justice and Equity Centre - Submission - System Strength Project - 2026-31 Revenue Proposal - May 2026
PDF (259.43KB) View details

Authors
Justice and Equity Centre
Document