Bullabulling's 3.90% Royalty May Be Permanent — The Step-Down Threshold Almost Certainly Won't Trigger

Franco-Nevada's additional A$200 million commitment to Bullabulling locks in a 3.90% gross royalty — a levy on every ounce of gold produced before any costs are deducted — that will cost Minerals 260 shareholders approximately A$117 per ounce at current gold prices, and the headline step-down provision that appears to limit that burden may never trigger.

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A gross royalty is fundamentally different from a net smelter return or a profit-sharing arrangement. It is taken off the top: if gold sells for A$3,000 per ounce at the mine gate, Franco-Nevada receives A$117 before Minerals 260 pays a single dollar of mining cost. The deal's headline structure offers relief: once cumulative production from the royalty area reaches 6 million ounces, the aggregate royalty rate falls to 2.75% — saving roughly A$34 per ounce thereafter. But here is the number that changes everything. The entire Bullabulling resource stands at 6.2 million ounces, comprising 190 million tonnes of ore grading 1.00 grams per tonne gold across five deposits. The gap between resource and step-down threshold is just 200,000 ounces — a margin so narrow that any grade reconciliation shortfall (when actual mining grades fall below the resource model's estimates, as they routinely do), metallurgical recovery below 100%, or pit boundary change could consume it entirely. The 2.75% rate may never apply for a single day of Bullabulling's operating life.

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Run the numbers forward. At an all-in sustaining cost — the full cost to mine, process, and sustain production, expressed per ounce — of A$2,000 per ounce, and gold at A$3,000 per ounce, the mine-gate margin before royalty is A$1,000/oz. The 3.90% gross royalty removes A$117/oz immediately, compressing that margin to A$883/oz — an 11.7% reduction in equity free cash flow per ounce. For a project with 6.2 million ounces, that is A$725 million in aggregate royalty payments against Franco-Nevada's total A$420 million invested — a return of roughly 1.7 times capital before discounting, and before any resource upside. Franco-Nevada is funding this entirely from cash on hand; it reported US$1.0 billion in cash and US$4.3 billion in available capital as of 30 June 2026. That liquidity position means the A$200 million commitment is operationally trivial for Franco-Nevada, while its structural effect on Bullabulling's economics is permanent and front-loaded.

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For royalty and streaming companies — the buy side here — this transaction is a template worth studying. Franco-Nevada has secured a royalty area expansion and raised the production threshold at which its rate steps down, both in its favour, while simultaneously acquiring the right to participate in Minerals 260's forthcoming equity raising. That equity right, backed by A$30 million, gives Franco-Nevada an option on further upside without additional royalty commitment. On the sell side, Minerals 260's managing director frames this as validation from the world's largest royalty company — and the A$420 million total package does allow the project to advance without conventional project finance debt (typically requiring security over the asset and restrictive covenant packages) or dilutive equity issuance at depressed share prices. The stock was trading at A$0.88 when it entered a halt ahead of the equity raising announcement. The real question for Minerals 260 shareholders is whether avoiding near-term dilution is worth accepting a permanent 3.90% gross royalty on a resource that almost certainly cannot exceed the step-down threshold in practice. For larger royalty and streaming operators — a Wheaton Precious Metals or a Royal Gold — benchmarking Franco-Nevada's implied yield against their own recent deal flow is now a live competitive exercise. For smaller royalty vehicles without Franco-Nevada's capital depth, the lesson is that threshold engineering in royalty agreements is where the real commercial leverage sits.

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For observers and competing royalty and streaming companies trying to price future opportunities, the signal to track is Minerals 260's forthcoming resource update and any grade reconciliation data released once development drilling advances. The Kalgoorlie gold district — Western Australia's dominant producing region, roughly 600 kilometres east of Perth — has a long history of resource models being revised as deposits are drilled more tightly, in both directions. A resource increase above 6.2 million ounces, however modest, would meaningfully change the probability that the step-down threshold is reached; a downward revision would confirm the 3.90% rate as permanent. Watch the ASX announcements from Minerals 260 through the first quarter of 2027, specifically any JORC-compliant (Joint Ore Reserves Committee — Australia's mineral resource reporting standard) resource statement update. If the indicated resource category — the higher-confidence portion, currently 140 million tonnes — expands materially, Franco-Nevada's deal terms will look more balanced in retrospect. If it contracts, the royalty burden will look exactly as asymmetric as the numbers already suggest.