2027 Fibre Input Methodologies Review
We are required to review the Fibre Input Methodologies (IMs) within 7 years of their publication. We commenced our review of them on 27 March 2025, and are required to complete this review by 13 October 2027.
The Commission has given notice that it will begin its first review of the fibre IMs. Our initial view is that the fibre IMs are generally working well and an in-depth bottom-up review is not required. While considering the breadth of the IMs, our work on the review should focus on the areas of highest value to end-users of fibre services.
A Notice of Intention and an Open letter seeking stakeholder views on the process and initial focus areas of the Fibre IM review was published on 27 March 2025. Submissions on the Open letter closed on 29 April 2025.
The Fibre IM Review 2027: Issues paper (Tranche 1) and the Fibre input methodologies draft decision-making framework paper were published on 10 July 2025. Stakeholders provided their views on these papers through submissions and cross submissions, which available under the ‘Documents’ tab below. In Q1 2026, we will publish the draft decision on tranche 1 issues and the final version of the decision-making framework paper.
As part of this review we will review our Fibre cost of capital IMs. This review of the Fibre cost of capital IMs will be carried out in conjunction with a limited review of the cost of capital IMs for suppliers regulated under Part 4 of the Commerce Act 1986. The joint elements will be limited to elements of our approach to the cost of capital that are common to Fibre and Part 4, including our approach to the cost of debt, the risk-free rate of interest for equity, and the tax adjusted market risk premium.
There will be further opportunities for stakeholder to present their views as we progress through this project.