Argentina isn’t exactly the first place that comes to mind when you think copper powerhouse. That’s Chile’s lane. But First Quantum Minerals just filed a technical report in February 2026 that should make the industry sit up and pay attention: Taca Taca, a massive copper-gold project in Argentina’s Salta province, carries an after-tax net present value of $5.9 billion.
That’s not a typo. And it’s more than double the project’s valuation from five years ago.
The timing isn’t coincidental. First Quantum is still licking its wounds from the forced closure of Cobre Panama in 2023, which stripped roughly 350,000 tonnes of annual copper production from its portfolio. Meanwhile, President Javier Milei’s administration is rolling out investment incentives aggressive enough to turn a historically hostile mining jurisdiction into something resembling investor-friendly territory.
The question isn’t whether Taca Taca is big. It is. The question is whether Argentina can actually deliver on the infrastructure, stability, and regulatory predictability needed to get this thing built.
Why the Valuation Doubled
Five years ago, Taca Taca was a promising deposit. Today, it’s one of the largest undeveloped copper assets globally. The transformation comes down to three factors: expanded reserves, higher copper prices, and a more optimized mine plan.
The February 2026 technical report outlines proven and probable reserves of 1.99 billion tonnes. That’s a substantial increase from earlier assessments. The project now projects an internal rate of return of 19.3% at current long-term price assumptions: a figure that puts it in the upper tier of global copper development projects.
Here’s what changed: the mine plan now calls for an initial processing capacity of 40 million tonnes per annum, expanding to 60 Mtpa from year five onward. That’s a massive throughput. For context, most major copper operations globally process between 30-50 Mtpa at steady state. Taca Taca would hit 60 Mtpa and maintain that pace for a 35-year mine life.
The economics look solid on paper. Over the first decade, the project is projected to produce 291,000 tonnes of copper and 133,000 ounces of gold annually. Cash costs are estimated at 97 cents per pound of copper: comfortably in the second quartile globally and well-positioned if copper prices remain elevated through 2026 and beyond.
Total capital investment, including the expansion phase, comes to $5.25 billion. That’s a big number. But spread across a 35-year asset with those production rates, the unit economics make sense. Especially when you consider that Argentina’s currency devaluation and Milei’s labor reforms are likely to keep operating costs competitive relative to peer jurisdictions.
The RIGI Factor: Milei’s Mining Play
Taca Taca doesn’t happen without RIGI. Argentina’s Régimen de Incentivo para Grandes Inversiones (Large Investment Incentive Regime) was created specifically to attract capital-intensive projects like this one. The program targets investments exceeding $200 million in mining, energy, and infrastructure.
The incentives aren’t subtle: 30-year fiscal stability guarantees, accelerated depreciation, and duty-free imports of capital equipment. For a project like Taca Taca, that translates to meaningful NPV accretion and de-risked returns.
First Quantum plans to apply for RIGI financing, with the application deadline extended to July 2027. Environmental and social impact assessment approval from Argentina’s Mining Secretariat is expected in the first half of 2026. But material spending isn’t anticipated to begin until 2028 at the earliest. That’s a realistic timeline for a project of this scale, particularly given the infrastructure buildout required.
And the infrastructure isn’t trivial. Taca Taca requires a 122.5 km transmission line connected to Argentina’s 345 kV electrical grid and a 5 km railway spur linking to the Salta–Mejillones line for Pacific Ocean access. These aren’t afterthoughts: they’re critical path items that determine whether this project pencils or not.
Milei’s administration is betting that projects like Taca Taca will position Argentina to “close the gap with neighbouring Chile.” That’s ambitious. Chile produces roughly 5.6 million tonnes of copper annually. Argentina produces a fraction of that. But if Taca Taca comes online at full capacity, it moves the needle.
Offsetting Cobre Panama: First Quantum’s Strategic Calculus
First Quantum didn’t choose Taca Taca as a vanity project. The company lost Cobre Panama: a world-class asset producing over 300,000 tonnes of copper annually: after a protracted legal and political battle with Panama’s government that culminated in a forced shutdown in late 2023.
Taca Taca’s production profile: 291,000 tonnes of copper per year in the first decade: maps almost perfectly onto the production hole left by Cobre Panama. That’s not coincidence. It’s portfolio reconstruction.
But there’s a key difference: jurisdictional risk. Panama proved that even operational assets in seemingly stable jurisdictions can be nationalized or shuttered through political maneuvering. Argentina historically ranks worse on mining-friendly indices than Panama did pre-2023. So why take the bet?
The answer lies in timing and incentive alignment. Milei’s government is economically desperate. Argentina needs foreign investment, hard currency revenue, and job creation in non-urban regions. Mining delivers all three. The RIGI framework isn’t charity: it’s pragmatic economic policy designed to attract capital that wouldn’t otherwise touch Argentina.
First Quantum is wagering that this alignment holds for at least the construction phase and early years of operation. The 30-year fiscal stability guarantee under RIGI is supposed to lock in that bet. Whether it survives a future administration is anyone’s guess.
Production Targets and Cost Structure
The first-decade production target of 291,000 tonnes of copper annually positions Taca Taca as a top-15 global copper producer once operational. The gold byproduct: 133,000 ounces per year: provides meaningful revenue diversification and offsets some of the copper price volatility.
Cash costs of 97 cents per pound assume several things: Argentine labor cost competitiveness, stable energy pricing via grid connection, and operational efficiency at the 60 Mtpa throughput rate. Any one of those assumptions breaking down could push costs into the second or third quartile.
What works in Taca Taca’s favor is grade and scale. The ore body is large enough to support a 35-year mine life at aggressive throughput rates, which spreads fixed costs across a massive production base. The open-pit design also avoids the complexity and cost escalation typical of underground operations.
But there’s no free lunch here. A $5.25 billion capital outlay in Argentina carries execution risk that wouldn’t exist in Canada or Australia. Cost overruns on infrastructure: particularly the transmission line and rail spur: could easily add 15-20% to the total budget. That risk is baked into the 19.3% IRR, but it’s worth watching.
What Happens Next
First Quantum expects environmental approval by mid-2026. RIGI application likely follows shortly after. Assuming both clear, the company enters detailed engineering and begins lining up project financing through 2027.
Material construction spending begins in 2028. First copper production, assuming everything stays on schedule, would be sometime in the early 2030s. That timeline puts Taca Taca’s ramp-up squarely into the period when global copper deficits are projected to widen significantly.
The strategic importance for Argentina is hard to overstate. Taca Taca would position Salta province as a major copper hub in South America, create thousands of jobs during construction and operation, and generate sustained hard currency export revenue. For Milei’s government, it’s a tangible proof point that market-oriented reforms and investor-friendly policies can attract world-class mining capital.
For First Quantum, it’s a replacement asset for Cobre Panama and a bet that Argentina’s mining sector is entering a multi-decade growth phase. The company is also hedging jurisdictional risk by diversifying its portfolio across multiple countries: a lesson learned the hard way in Panama.
The $5.9 billion valuation reflects all of this: scale, grade, favorable economics, supportive policy, and strategic timing. Whether that valuation translates into a producing mine depends on execution, political stability, and Argentina’s ability to deliver on infrastructure commitments.
The technical fundamentals are there. Now it’s a question of whether Argentina can hold up its end.
