COPPERPEAPROJECT ECONOMICS

Los Azules Copper Project – NI 43-101 Case (Including Inferred) PEA: $2.66B NPV, 21.2% IRR

ByMining Stocks Research
Sep 21, 2026
Source:McEwen Mining Inc.
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McEwen Mining Inc.'s Los Azules Copper Project – NI 43-101 Case (Including Inferred) in San Juan Province, Argentina has a Preliminary Economic Assessment (PEA) outlining an after-tax NPV of $2.66B, an after-tax IRR of 21.2%, and initial capital of $2.46B. The proposed mine plan runs 27 years.

McEwen Mining Inc.'s Los Azules Copper Project – NI 43-101 Case (Including Inferred) has reported Preliminary Economic Assessment (PEA) results for the copper project in San Juan Province, Argentina. The study headlines an after-tax net present value of $2.66B at a 8% discount rate. It reflects McEwen Mining Inc.'s (MUX.TO) latest disclosed economics for the asset.

Economics. The after-tax NPV is $2.66B using a 8% discount rate. After-tax IRR is 21.2%. Initial capital expenditure is estimated at $2.46B, with life-of-mine sustaining capital of $2.24B. The study models a payback period of 3.2 years. All-in sustaining costs are pegged at 1.64 USD/lb Cu. Economics are based on Copper (Cu) - $3.75/pound; Gold (Au) - $1,700/ounce; and Silver (Ag) - $20.00/ounce.

Production and mine plan. The project envisions an open-pit operation. Life of mine is 27 years. The open-pit strip ratio is 1.16.

Resources and ownership. The company holds a 51.9% interest in the project.

These figures are extracted from McEwen Mining Inc.'s technical disclosures and reflect the most recent PEA on file. Compare this project against other developers and producers in our project economics database, and always verify the numbers against the original technical report before making any investment decision.

Mining Stocks Research

Our Analysis

IRR after-tax
21.2%

higher than 52% of 29 projects we track

NPV after-tax
$2.66B

higher than 87% of 38 projects we track

Initial capex
$2.46B

93% of NPV

costlier than 76% of 42 projects we track

Payback
3.2yrs

slower than 32% of 28 projects we track

Mine life
27yrs
Discount rate
8%
Study price assumption
Copper (Cu) - $3.75/pound; Gold (Au) - $1,700/ounce; and Silver (Ag) - $20.00/ounce
Spot copper today
$6.81/lb

A US$2.46B build against a US$1.24B market capitalisation is the fact that governs everything else here. The company cannot fund this from its own balance sheet, and it cannot fund it quietly: the cheque is roughly twice the value of the entire business. That leaves a short list of realistic writers. A partner or streaming arrangement, a joint-venture sell-down of a majority stake, or a large equity raise that hands a substantial part of the asset to new holders. Each path transfers value away from the existing register, and at this ratio the dilution or partner share is not a rounding error. Note too that the portfolio runs to 36 projects, so this is one commitment among many rather than an existential bet, which cuts both ways: less pressure to build at any cost, but also less reason to fund it alone.

The economics underneath are respectable without being exceptional. After-tax NPV of $2.66B ranks above 87% of the 38 copper projects we track, and the 21.2% after-tax IRR sits in the upper half of the 29 we compare, clearing the roughly 15% that developers typically need to attract project finance. Payback of 3.2 years is moderate. Capex at 93% of NPV is not unusual for copper, and the 8% discount rate is a reporting convention rather than a hurdle.

Two caveats temper all of it. This is a scoping-level PEA: inferred material can carry the mine plan, and the capital estimate comes with a plus or minus 50% band, so the $2.46B could move materially in either direction before anyone signs a funding package. And the study assumes $3.75/lb copper against a live spot of $6.81/lb, so the returns are built on a price well below today's market, which is genuine headroom if it holds.

The question that decides this: can management convert a preliminary study into a financeable, fully permitted project without surrendering so much of it that existing holders are left with the shell?

Our take, benchmarked against the project economics in the Mining Stocks database. Figures are estimates drawn from company technical reports — not investment advice; always verify against the source filing.

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View the source filing from
McEwen Mining Inc.
View Source Filing (PDF) →
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