2026 Gas default price-quality path
We’re reviewing the default price-quality paths (DPP4) for gas distribution and transmission from 1 Oct 2026. The current paths (DPP3), set in 2022, expire on 30 Sep 2026. New DPPs must be set by 31 May 2026 under the Commerce Act.
Draft decision publication
On 27 November 2025, we published our draft decision package on the Gas DPP4 2026, and our Proposed amendments to the Gas Input Methodologies for Gas Transmission Services.
On 28 January 2026, we published 19 submissions received in response to our Draft decisions.
On 24 February 2026, we published 10 cross-submissions received in response to our Draft decisions. We thank all submitters for their time in providing views on these important issues.
All documents can be found under the ‘Documents’ tab below.
Draft decision stakeholder briefing
Workshops:
On 15 July 2025, we held an online technical workshop on Scenarios modelling. The recording is below, and the accompanying slides are available under the 'Documents' tab.
Indicative project timeline
We will update dates for specific publications as we progress.
| Date | Key process or publication |
| June 2025 | Issues paper |
| June – September 2025 | Stakeholder engagement and technical workshops, as required |
| November 2025 | Draft decision |
| May 2026 | Final decision |
| 1 October 2026 | Gas DPP4 commences |
The four gas distribution businesses subject to price-quality regulation under Part 4 of the Commerce Act 1986 are First Gas, GasNet, Powerco and Vector. First Gas also has a gas transmission business that provides gas to large users of natural gas such as big industrial plants, electricity generators and the gas distribution businesses.
Businesses affected by the 2026 gas DPP
Distribution
- GasNet
- Powerco Limited
- Vector Limited
- First Gas Limited
Transmission
- First Gas Limited
You can find information on previous reviews of the DPPs that apply to gas distribution and gas transmission businesses, on the 2022 gas default price-quality path page.