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 Base case gold price of US$3,000/oz.
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.
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.
Reserves & Resources
| Category | Tonnage | Grade | Contained |
|---|---|---|---|
| Measured & Indicated | — | 1.3 g/t Au | 5.0 Moz Au |
| Inferred | — | 1.6 g/t Au | 1.2 Moz Au |
Our Analysis
- IRR after-tax
- 25.2%
higher than 20% of 108 projects we track
- NPV after-tax
- $1.80B
higher than 87% of 143 projects we track
- Initial capex
- $820M
45% of NPV
costlier than 87% of 143 projects we track
- Payback
- 3yrs
slower than 81% of 88 projects we track
- Mine life
- 21.3yrs
- Discount rate
- 5%
- Study price assumption
- Base case gold price of US$3,000/oz
- Spot gold today
- $4,476.60/oz
Nothing in this study is an outlier, and that is precisely the point. The 25.2% after-tax IRR ranks in the bottom quartile of the 108 gold projects we track, while the after-tax NPV of $1.80B sits in the top 13% of 143. That split is the tell: this is a long-life, low-return asset whose value is concentrated in duration, not in rate. A 3-year payback, moderate against peers, confirms the cash flows are not front-loaded. For an investor, this ranks as a steady, utility-grade gold build, not a growth story, and the market appears to agree.
The constraint that matters is funding, and here the picture is unusually benign. The $820M initial capex is only 0.2x the company's US$4.18B market cap, a scale that a diversified mid-cap with three other tracked projects can finance without existential dilution. Capital intensity at 45% of NPV is low, and the NPV itself is below the company's equity value, so there is no gap where the market must re-rate the asset for the build to make sense. The two-sided read: the market is not pricing in a financing overhang, but it is also not rewarding the project for its NPV rank, because the IRR is too pedestrian to justify a premium.
Two caveats temper the headline figures. First, this is a PEA, scoping-level, with a capital estimate that carries a wide band and the possibility of inferred resources; the 21.3-year mine life and $1.80B NPV deserve less confidence than a feasibility-grade number. Second, the study's US$3,000/oz base case sits far below today's spot of $4,476.60/oz, which flatters the returns on a mark-to-market basis, though the 5% discount rate, at the low end of convention, inflates the NPV in the other direction. Guyana is a developing mining jurisdiction, adding execution risk to a project whose returns already rank near the bottom. The question that decides this one: can a mid-cap with a diversified portfolio accept a bottom-quartile IRR on a 21-year asset in a higher-risk jurisdiction, or does the low capex burden simply make it a tolerable portfolio filler rather than a value creator?
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.