About the TPM
Information on the TPM and sign up for updates
Transmission Pricing Methodology
Assumptions book
This page includes our current and previous versions of our assumptions book.
BBI starting customer allocations
This page includes our benefit-based investment (BBI) decision documents and related consultation materials.
TPM decisions
All (non BBI) decision documents and related closed consultation papers, submissions and cross-submissions.
TPM current consultations
Current consultations
TPM updates
Updates related to our work administering the TPM
Grid Pricing Q&As
Here, you'll find answers to commonly asked questions and helpful insights on key topics relating to Grid Pricing. If you don't see your question here, please feel free to reach out.
TPM proposal to the Electricity Authority
In mid-2020 the Electricity Authority published new transmission pricing methodology (TPM) Guidelines and tasked Transpower with developing a proposed new TPM
TPM development process
We worked within a tight timeframe to develop a proposed new transmission pricing methodology for the Electricity Authority
TPM development engagement
We engaged with stakeholders, including through formal consultations, during the development phase of the new TPM