Australia’s Mining Exploration Hits $1.14bn, but a Tax Shock Looms

Australia’s mineral exploration spend hit A$1,142.9 million in the June quarter, up 3.9% on the March quarter and 24% higher than the same period in 2025. Uranium exploration surged 130% to A$15.4 million, the highest percentage gain of any commodity tracked. But the number that matters most is not in today’s data at all.

The commodity-level breakdown tells a story the headline figure obscures. This was not a gold-only quarter. Copper, base metals, iron ore and uranium all posted double-digit gains simultaneously, pointing to broad-based confidence across decarbonisation, electrification and nuclear demand. Meanwhile, the capital gains tax reforms announced in the 12 May 2026 Federal Budget received Royal Assent on 26 June 2026, meaning the most significant policy change for junior exploration financing in a generation landed inside the quarter but too late to show up in the spending data.

Here is what the commodity breakdown actually shows, and why the September quarter matters more than today’s release.

Uranium leads the pack, but the June quarter surge runs wider than one commodity

Uranium’s 130% quarterly rise to A$15.4 million was the standout. No other commodity came close on a percentage basis. But stopping at uranium misses the signal.

Uranium exploration: A$15.4 million, up 130% quarter-on-quarter (June 2026 ABS data), the highest percentage gain of any commodity tracked in the quarter.

Copper exploration grew 29.2%. Silver, lead and zinc combined surged 60.8%. Iron ore advanced 26.3%. These are not marginal moves in a single commodity cycle; they are broad-based capital deployment across multiple demand themes running at the same time.

Gold remains the anchor. Western Australia’s gold exploration spend reached A$461.1 million in the June quarter, the dominant share of WA’s total A$2.99 billion mineral exploration expenditure. Gold’s scale is what makes the percentage gains elsewhere meaningful: uranium and base metals are rising from a smaller base, but the capital is real, and the breadth of the surge tells you exploration budgets are responding to structural demand across decarbonisation metals, not just a single commodity price signal.

Australia’s elevated exploration commitment reflects uranium’s role in global energy security, where the structural case for nuclear fuel supply has shifted from cyclical price recovery to long-term decarbonisation demand underpinning utility procurement contracts across Europe and Asia.

What is driving uranium’s revival in the ground, not just on the screen

The 130% quarterly surge is not a single-quarter aberration. Geoscience Australia’s Australian Energy Commodity Report (AECR) 2026 records that uranium exploration spending reached A$71 million in 2024, the highest in over a decade. The June 2026 quarter figure sits on top of a multi-year recovery driven by sustained price strength and growing global demand for nuclear fuel as part of decarbonisation strategies.

The AECR 2026 uranium and thorium chapter confirms that Australian uranium exploration spending reached A$71 million in 2024, the highest level in over a decade, establishing the multi-year recovery trend that the June 2026 quarterly surge extends rather than initiates.

The Resources and Energy Quarterly (June 2026) links the exploration uplift directly to elevated uranium prices and the structural growth in nuclear energy demand. A paper presented at the AGES 2026 conference noted “cause for optimism for increased exploration activity in 2026” across uranium, copper, gold and other commodities, situating uranium within a broader surge rather than treating it as isolated.

Three distinct forces are converging:

• Price recovery: Uranium prices have sustained levels that make exploration economic after a decade of under-investment, with the AECR 2026 confirming a clear upward trajectory from 2019-2020 lows.
• State-level policy shifts: New South Wales passed a bill through its upper house to remove a 39-year uranium mining ban. The Western Australian government has granted exploration funding to uranium projects despite a continuing mining ban, lowering barriers to committed capital.
• Project-level momentum and international interest: Cauldron Energy’s Yanrey project in Western Australia holds a 55-million-pound uranium resource, with an additional 40-million-pound exploration target on newly acquired tenements, targeting a greater than 100-million-pound resource base. French and Japanese investor interest has been noted.

The passage of the NSW uranium mining ban repeal through the upper house represents a structural shift in the regulatory environment, removing a constraint that had locked out exploration capital from one of Australia’s most prospective jurisdictions for decades.

State-level policy shifts open new ground

The policy dimension is what separates this uranium recovery from previous false dawns. Price alone has driven uranium exploration surges before, and they faded when prices corrected. This time, state governments are actively removing regulatory barriers that previously locked out exploration capital entirely. When the regulatory environment shifts in the same direction as price, the floor under exploration spending is structurally higher. That distinction matters for how durable this cycle proves.

The CGT variable that did not make it into today’s numbers

The June quarter result is real. The commodity gains are broad-based. The aggregate figure of A$1,142.9 million is strong by any recent measure. But the Association of Mining and Exploration Companies (AMEC) has been explicit: the most significant policy variable in a generation has not yet entered this data.

AMEC CEO Warren Pearce described the capital gains tax changes as a “dark shadow” over mineral exploration, warning that the “real test will be the next quarter stats.” — S&P Global Metals, 3 June 2026

The Federal Budget announced on 12 May 2026 introduced capital gains tax reforms that received Royal Assent on 26 June 2026 as the Treasury Laws Amendment (Tax Reform No. 1) Act 2026 (No. 49 of 2026). The reforms take effect for gains accruing on or after 1 July 2027 and include:

• Replacement of the 50% CGT discount with a discount based on inflation-adjusted cost-base indexation
• Introduction of a minimum 30% tax on capital gains
• Exclusion of mineral exploration from the new concessions and carve-outs applied to other sectors

AMEC flagged that the effect of these amendments had not been captured in the June quarter data, given the timing of the announcement and Royal Assent relative to the spending period. The September 2026 quarter results are anticipated to serve as the first data window in which CGT-influenced capital allocation decisions could appear.

The data lag means today’s headline number is a pre-policy-shock reading. It is strong in isolation, but it may represent the high-water mark before a behavioural shift appears in the September figures.

What AMEC’s warnings mean for junior explorer funding in practice

Junior exploration in Australia is predominantly funded by retail investors accepting high binary risk, where most exploration projects fail but the occasional discovery delivers outsized returns. The 50% CGT discount has historically been part of the risk-reward calculation those investors make. Removing it is not an accounting adjustment; it changes the after-tax payoff structure that underpins how early-stage discoveries get financed.

AMEC’s June 2026 media release stated the reforms “unfairly and disproportionately impacts junior explorers searching for the next critical minerals discovery.” The industry body has called for a specific exemption for mineral exploration investors, arguing that exploration carries risk comparable to venture capital and start-up investment, and that excluding it from concessions available to other sectors creates an asymmetry that penalises the exact risk-taking behaviour Australia’s mineral pipeline depends on.

• Discount removal: The 50% CGT discount that rewarded long-term holding is replaced with inflation-adjusted cost-base indexation, which delivers a materially smaller benefit in most exploration investment scenarios
• Minimum tax floor: A 30% minimum tax on capital gains applies from 1 July 2027, compressing the after-tax return on successful exploration investments
• Sector exclusion: Mineral exploration was excluded from new CGT concessions that other sectors, including small business, received in the same budget

The Minerals Council of Australia (MCA) has modelled that investor returns in junior exploration companies could fall by around 19% under the reforms, according to MCA analysis (noting this figure has not been independently verified). The Chamber of Minerals and Energy WA (CME) has warned that tax payable on shares sold after a discovery could double under the new system, per West Australian business reporting (also not independently verified). A ShareCafe article quoting AMEC described the changes as potentially “cutting the throat” of mineral exploration.

For investors wanting to understand the MCA’s modelling in detail, our full explainer on CGT impacts for junior explorers covers the methodology behind the 19% return reduction estimate and the specific investment scenarios where the minimum 30% tax floor compresses after-tax outcomes most severely.

Why investor behaviour may shift before the law does

The reforms do not technically apply until 1 July 2027. But forward-looking investors reprice risk before implementation, not after. If retail capital begins rotating away from high-risk exploration positions in anticipation of less favourable after-tax outcomes, the effect on exploration budgets could appear well before the law formally takes effect. The September quarter data may already carry that signal.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions.

What the September quarter data will, and will not, be able to tell us

AMEC CEO Warren Pearce named it directly: the “real test will be the next quarter stats.” The September 2026 quarter will be the first data window in which any behavioural response to the CGT reforms could appear, given the June quarter’s clean pre-policy reading.

The interpretive difficulty is genuine. If the September quarter shows a slowdown, disentangling CGT behavioural effects from commodity price movements, seasonal patterns and normal quarterly variation will be difficult. Investors should hold that uncertainty rather than draw premature conclusions from a single data point.

For readers wanting to place the June quarter result within a longer-term trend, our dedicated guide to reading ABS exploration expenditure data examines how quarterly figures interact with seasonal patterns and commodity cycles to identify whether a surge represents structural uplift or short-term volatility.

Two scenarios provide interpretive anchors:

1. A continued surge (above the June quarter’s A$1,142.9 million baseline and significantly above the March quarter’s A$949.3 million) would signal that commodity price strength and structural demand are overwhelming the policy headwind, at least in the near term.
2. A deceleration or decline would raise the question of whether retail capital is already repricing exploration risk, even though the CGT reforms do not formally apply until 1 July 2027, making it the most closely watched ABS release in years for the junior exploration sector.

A surge built on real demand, with a policy test that cannot be deferred

The June quarter data are genuinely strong and genuinely broad-based. Uranium’s 130% surge, copper’s 29.2% gain, and the 60.8% jump in silver, lead and zinc exploration sit within an aggregate A$1,142.9 million quarter that is 24% above the same period last year. The exploration dollars going into the ground are real.

So is the policy uncertainty. The CGT reforms legislated on 26 June 2026 and effective from 1 July 2027 represent the first direct legislative challenge to the retail investor funding model that has financed junior exploration for decades. AMEC’s campaign for a mineral exploration carve-out remains unresolved.

The September quarter will not settle the question definitively. But it will be the first data point where commodity confidence and policy caution meet in the same numbers. Investors, analysts and policymakers will each be reading it for a different answer, and the junior exploration sector’s trajectory into 2027 may depend on which reading proves correct.