Patagonia Gold Cuts Calcatreu AISC 36% to $1,439/oz

Patagonia Gold Corp. restated the headline economics of its Calcatreu gold-silver Preliminary Economic Assessment on Oct. 6, 2026, cutting projected All-In Sustaining Cost by 36% to $1,439 per ounce and Cash Cost by 38% to $1,332 per ounce. The Vancouver-based company, listed on the TSX Venture Exchange under PGDC, also lifted the after-tax net present value of the Río Negro Province project to $370 million from $334 million and raised the after-tax internal rate of return to 315% from 282%. The corrected figures supersede those published on Sept. 28, 2026.

Context — why the Calcatreu restatement matters now

The correction lands two months after the company's original PEA release and days after the numbers would have begun circulating through sell-side models and screening tools. Cost metrics drive the relative-value comparisons that generalist funds run across junior gold developers, so an error in the AISC line propagates faster than an error in a resource estimate.

The company said the September figures inadvertently included estimated income tax inside both Cash Cost and AISC. Under the methodology Patagonia uses, which it describes as based on the World Gold Council's guidance note on non-GAAP metrics, income tax sits outside those measures. That is a definitional mismatch rather than a change in the underlying mine plan.

The second error was arithmetic. The regional development tax calculation in the PEA model applied the gold and silver tax rates to total revenue instead of applying each rate separately to the revenue from the corresponding metal. Silver grades at Calcatreu are meaningful, so blending the two rates across combined revenue distorted the tax line.

A third item was disclosure only. The company reported silver recovery as 30% when the economic model had already been run at 45%. Patagonia said this correction changes nothing in the modelled silver production, cost metrics or economic results.

Argentina's mining provinces have drawn renewed attention from developers weighing permitting timelines against currency and fiscal risk, though the report gives no broader sector backdrop and no peer comparison.

Data — what the numbers show

The restatement moves every headline economic metric in the same direction.

PEA metric	Previously reported	Revised
After-tax NPV at 10%	$334M	$370M
After-tax IRR	282%	315%
After-tax payback period	0.6 years	0.5 years
Silver recovery	30%	45%
Cash Cost	$2,139/oz Au	$1,332/oz Au
AISC	$2,246/oz Au	$1,439/oz Au

The NPV gain of $36 million represents roughly 11% of the original figure. The cost reduction is proportionally larger: a $807 per ounce drop in AISC against a $2,246 base.

Patagonia said the income tax exclusion is a presentation correction that does not touch the underlying after-tax analysis. The regional development tax fix does affect cash flows, and therefore flows through to the shorter payback period and the higher NPV and IRR. Income tax remains inside the after-tax economic analysis.

The PEA assumes a 16-year mine life and metal prices of $3,500 per ounce of gold and $35 per ounce of silver. Both assumptions are unchanged from the original release.

The sensitivity table shows the NPV is most responsive to the gold price. A 50% price decline takes the NPV to $77 million, while a 50% increase lifts it to $658 million. Capital costs, operating costs and the discount rate each move the NPV by far less across the same range.

Analysis — what it means for markets and sectors

The restatement matters most for readers who screened Calcatreu on cost. At $2,246 per ounce, AISC sat above the metal price assumptions of many mid-tier producers and would have placed the project in the upper quartile of the global cost curve. At $1,439, the project sits in a materially different bracket, and the NPV sensitivity to gold price becomes the dominant variable rather than cost inflation.

Exposure is narrow. Patagonia Gold is a single-asset developer on the TSX Venture Exchange, so the read-through runs to other Argentina-focused developers and to the royalty and streaming companies that negotiate on projects of this size. The report names no peers, gives no royalty counterparties and discloses no financing structure, so the scope of that read-through cannot be sized from the release.

The obvious counter-argument is that a PEA is a study, not a mine. Patagonia's own cautionary language states the assessment is preliminary and relies in part on inferred mineral resources that are too speculative geologically to carry the economic considerations that would allow them to be classed as mineral reserves. Mineral resources that are not mineral reserves have no demonstrated economic viability, and the company said there is no certainty the PEA results will be realized.

Positioning into the correction is likely dominated by existing holders and event-driven accounts rather than new institutional money, because the technical report that would let a credit or equity desk underwrite the numbers has not yet been filed.

Outlook — what to watch next

The near-term catalyst is the NI 43-101 technical report. Patagonia said it will be filed on the company's SEDAR+ profile within 45 days of the Sept. 28, 2026 news release, and that it will reflect the revised Cash Cost, AISC, after-tax NPV, after-tax IRR and after-tax payback period, along with the 45% silver recovery assumption already embedded in the model.

Beyond that, the company points to further exploration as a route to expanding mineral resources, alongside planned technical, permitting and development work. No timelines for those activities were given.

The variables that move the NPV most, per the company's own sensitivity table, are the gold price and, to a lesser degree, capital and operating costs. Any revision to the $3,500 per ounce gold assumption would reset the $370 million base case. The report gives no share price, market capitalization or financing terms, so no level-based triggers can be drawn from it.

Frequently Asked Questions

Why did Patagonia Gold restate its Calcatreu PEA numbers?

Two errors and one disclosure mistake. The company said estimated income tax had been included in Cash Cost and AISC when its chosen methodology excludes it. Separately, the regional development tax applied gold and silver rates to total revenue rather than to each metal's own revenue. The silver recovery figure was reported as 30% when the model already used 45%.

What is the difference between Cash Cost and All-In Sustaining Cost?

Cash Cost captures the direct cost of producing an ounce of gold, net of by-product credits from metals such as silver. AISC adds sustaining capital, royalties, reclamation and administrative costs. Patagonia said both are projected life-of-mine averages, expressed per ounce of gold, net of silver credits and excluding estimated income tax. Both are non-IFRS measures with no standardized meaning.

Does the correction change the Calcatreu mine plan or resource estimate?

No. The company said the silver recovery correction relates solely to the previously disclosed percentage, and that the modelled silver production, cost metrics and economic results are unchanged by it. The mine life, metal price assumptions and the Mineral Resource Estimate, which includes 1.50 million tonnes measured and 5.28 million tonnes indicated, all remain as previously disclosed.

Bottom Line

Patagonia Gold's Calcatreu restatement cuts AISC 36% and raises after-tax IRR to 315%, but the technical report backing those numbers is not yet filed.

Disclaimer: This article is for informational purposes only and does not constitute investment advice. CFD trading carries high risk of capital loss.