Summary

  • ACMA’s 14 October consultation concerns the future evidence and calendar used to update spectrum renewal benchmarks, after its broad pricing method was set in May.
  • The choices reach beyond a headline unit price: the awards admitted to the sample, purchasing-power conversions and projected licence-area populations all feed the final spectrum access charge.

On 14 October, the Australian Communications and Media Authority opened a consultation on updating benchmark datasets for expiring spectrum licences. Responses are due by 5 pm AEDT on 9 December. Most in-force licences covered by the programme expire between June 2028 and October 2032, so this is a design decision made ahead of several renewal windows, not a report of prices newly imposed on carriers.

The distinction matters. ACMA’s May Stage 4 paper established its preferred valuation method and indicative prices using domestic and overseas spectrum awards. The October paper largely takes that method as given and asks how the evidence should be refreshed as later bands approach renewal. ACMA says the renewal windows for 850 MHz and 1800 MHz opened on 18 June 2026; it does not plan to add new awards or revise those bands’ preferred prices through the proposed future-update process. Later bands have not yet passed through the same update sequence.

Under the proposed calendar, benchmark awards could be included up to six months before a band’s renewal application window. For 2.5 GHz, the proposed data cut-off is 1 April 2027 and the application window is due to open on 1 October 2027. The corresponding dates are 1 July 2027 and 1 January 2028 for 700 MHz; 25 January and 25 July 2028 for 2.3 GHz; 14 June and 14 December 2028 for 3.4 GHz; and 12 April and 12 October 2030 for 2 GHz. The gap is intended to leave time to verify the awards, recalculate prices, consult and publish the result before renewal applications begin. ACMA’s October paper also preserves the existing exclusion screen: an administrative allocation that does not reveal a market price, a sale with too little bidder competition, a materially unsold auction, a use case that is not comparable, or an award with inadequate public price or licence data may not belong in the sample.

Small movements in the current reference figures show why the record needs to be readable. ACMA reports that the latest World Bank purchasing-power-parity data, which also revise some recent years, changed its preferred $/MHz/pop values in both directions. The 700 MHz reference falls from A$0.6618 to A$0.6604; the 2 GHz value rises from A$0.3389 to A$0.3404. Changes for 2.3 GHz, 2.5 GHz and 3.4 GHz are also small and mixed. These are normalised benchmark unit values, not a carrier’s total charge and not a retail price.

ACMA converts such values into spectrum access charges by multiplying the band’s unit price by licence bandwidth and the population of the licence area.

The paper proposes a fixed 2.5% annual indexation rate and a revised calculation sequence that brings old and new awards directly to the relevant licence commencement date. ACMA describes that sequencing change as mechanical and says it does not change price outcomes. That statement applies to the sequence, not to every future data update: new awards or revised economic inputs can still move a benchmark. Keeping those two effects separate is necessary to tell whether a changed number comes from new market evidence or from a changed calculation rule.

Population is a second input with a different clock. ACMA proposes applying one growth factor per band to the licence-area populations in the 2021 Census-derived Hierarchical Cell Identification Scheme. It would estimate the factor from the Australian Bureau of Statistics’ estimated-resident-population series and Federal Budget forecasts, then fix projections six months before each renewal window. The authority expects 2026 Census cell data in the second half of 2027. Earlier projections offer certainty; later data might be more current.

Because population multiplies the unit price in each licence area, that choice affects the charge calculation even if the benchmark price itself is unchanged.

This consultation therefore opens a bounded but consequential question: can a licensee, a competing operator or another interested party reconstruct why an award was included, how its price was normalised and how a licence-area population was projected before the renewal decision is due? ACMA proposes a separate consultation for each relevant band and would publish proposed awards, their net price effect, the updated full-duration value and the supporting spreadsheet. The paper asks whether those consultations should follow a predetermined timetable or begin as soon as the analysis is ready.

ACMA prefers the scheduled option and proposes six weeks for comments.

The May pricing decision is the framework. The October consultation is about the evidence arriving through it. ACMA’s Stage 4 paper describes benchmarking as an estimate of market value; the new paper gives stakeholders a chance to examine the next set of observations and the population assumptions beside them. The practical test is not whether every result is predictable. It is whether the inputs, exclusions and arithmetic are visible early enough for a substantive challenge.