Toroparu PEA: $1.80B NPV, 25.2% IRR
Aris Mining Corporation's Toroparu in Guyana has a Preliminary Economic Assessment (PEA) outlining an after-tax NPV of $1.80B, an after-tax IRR of 25.2%, and initial capital of $820M. The mine plan runs 21.3 years at about 235 koz Au per year.
Aris Mining Corporation's Toroparu has reported Preliminary Economic Assessment (PEA) results for the gold project in Guyana. The study headlines an after-tax net present value of $1.80B at a 5% discount rate. It reflects Aris Mining Corporation's (ARIS.TO) latest disclosed economics for the asset.
Economics. The after-tax NPV is $1.80B using a 5% discount rate. After-tax IRR is 25.2%. Initial capital expenditure is estimated at $820M. The study models a payback period of 3 years. All-in sustaining costs are pegged at 1300 USD/oz. Economics are based on $3,000/oz gold (base case).
Production and mine plan. The project envisions an open-pit operation. Life of mine is 21.3 years. Average annual production is approximately 235 koz Au. Average head grade is 1.3 g/t Au.
Resources and ownership. Mineral resources: 5.3Moz M&I gold resources at 1.3 g/t; 1.2Moz inferred gold resources at 1.6 g/t. The company holds a 100% interest in the project.
These figures are extracted from Aris Mining Corporation'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.
Our Analysis
The 25.2% after-tax IRR lands in the bottom quartile of the 90 gold projects we track, but it still clears the practical financing hurdle for a single-asset junior by a meaningful margin. The 5% discount rate is a tell: it sits at the low end of the reporting convention, which flatters the $1.80B NPV—a figure roughly in line with the company’s market cap. That near-parity can be read two ways: either the market has not yet priced in the project’s value, or it is discounting financing, permitting, or jurisdictional risks.
The $820M initial capex is capital-light at 45% of NPV, reducing funding risk, but the 3-year payback is moderate for a 21.3-year mine life. The base-case gold price of $3,000/oz sits well below the current live spot of $4,193.80/oz, implying material upside to returns if prices hold—but also raising the question of whether the study’s assumptions are conservative enough. The single most important watch-item is permitting risk: a 21-year mine life demands long-term social license, and any delays could erode the NPV that the low discount rate has inflated.
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.