Transmission Pricing Methodology

Implementing a new TPM

On 12 April 2022, the Electricity Authority (Authority) announced its decision to adopt a new Transmission Pricing Methodology (TPM). Transpower is now working to implement the new TPM into prices that will take effect from 1 April 2023. The Authority's decision paper and the new TPM are available on the Authority's website

The TPM determines how Transpower recovers the annual cost of running the national transmission grid from transmission customers.

Useful information

A short Guide to the TPM
Information sheet on connection charges under the new TPM
Information sheet on the FAC mechanism to address Type 1 FMD
Information sheet on residual charges v2
Information sheet on benefit-based charges: Simple method v2
Information sheet on benefit-based charges: Standard method
Information sheet on benefit-based charges: Appendix A BBI
Information sheet on benefit-based charges: Adjustments

To help people understand the new TPM we have prepared the above resources. Over time, and as we work to implement the new TPM into prices, we intend to develop and share more information about how it will work in practice.

You can find our updated consultation schedule on our TPM current consultations page. All decision documents, consultation documents, submissions and cross-submissions for past consultation are on our TPM decisions page. View our indicative pricing updates here.


Further information

Grid pricing
Development of the new TPM


Please email if you have any questions about the implementation of the new TPM. 


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