Grid prices
Information on current and historical grid prices
About the TPM
The TPM determines how Transpower recovers the annual cost of running the national transmission grid from transmission customers
Indicative pricing
Information on the calculation of indicative connection charges, benefit-based charges and residual charges under the TPM
Assumptions book
Current and previous versions of our assumptions book, as well as consultation material and submissions
Starting BBI customer allocations
Current and closed consultations on starting BBI customer allocations, as well as determinations where these have been made
Settlement Residue Allocation Methodology
How Transpower allocates settlement residue to customers from the Clearing Manager (NZX) under Part 14 of the Electricity Industry Participation Code 2010
Grid Pricing Q&As
Answers to commonly asked questions and helpful insights on key topics relating to Grid Pricing
TPM development archive
Information relating to the development of, and transition to, the TPM
Top questions asked
Below are some of the frequently asked questions we get about grid pricing and the TPM. Click here to read our complete FAQs.
Transpower makes up 8% of your power bill
All the different services that help the power system operate are paid for by households through their power bill. This includes transmission charges, which make up around 8% of the average household power bill.
Below is a breakdown of what percentage of your bill different services make up on the average monthly household power bill.
Graphic courtesy of the Electricity Authority.