Porvenir PFS: $460M NPV, 37.9% IRR
Mineros S.A.'s Porvenir in Nicaragua (Hemco Property, Región Autónoma de la Costa Caribe Norte) has a Pre-Feasibility Study (PFS) outlining an after-tax NPV of $460M, an after-tax IRR of 37.9%, and initial capital of $207M. The proposed mine plan runs 9 years.
Mineros S.A.'s Porvenir has reported Pre-Feasibility Study (PFS) results for the gold (polymetallic: au, ag, zn, cu) project in Nicaragua (Hemco Property, Región Autónoma de la Costa Caribe Norte). The study headlines an after-tax net present value of $460M at a 5% discount rate. It reflects Mineros S.A.'s (MSA.TO) latest disclosed economics for the asset.
Economics. The after-tax NPV is $460M using a 5% discount rate. After-tax IRR is 37.9%. Initial capital expenditure is estimated at $207M. The study models a payback period of 2 years. All-in sustaining costs are pegged at 1295 USD/oz AuEq. Economics are based on Base case: US$3,150/oz Au, US$45.00/oz Ag, US$1.22/lb Zn, US$4.72/lb Cu.
Production and mine plan. The project envisions an underground (cut-and-fill stoping and sub-level stoping) operation. Life of mine is 9 years. Average head grade is 2.86 g/t Au, 12.27 g/t Ag, 0.37% Cu, 2.61% Zn (P&P reserves); 3.74 g/t AuEq. Metallurgical recovery averages 88.4%.
Resources and ownership. Mineral reserves: Proven & Probable: 6,477 kt @ 2.86 g/t Au, 12.27 g/t Ag, 0.37% Cu, 2.61% Zn (3.74 g/t AuEq) containing 596 koz Au, 2,555 koz Ag, 52 Mlb Cu, 372 Mlb Zn (778 koz AuEq). Mineral resources: M&I: 2,969 kt @ 1.91 g/t Au, 9.10 g/t Ag, 0.28% Cu, 2.18% Zn (2.44 g/t AuEq) containing 182 koz Au, 869 koz Ag, 18 Mlb Cu, 143 Mlb Zn (233 koz AuEq); Inferred: 1,031 kt @ 2.05 g/t Au, 6.77 g/t Ag, 0.12% Cu, 2.35% Zn (2.54 g/t AuEq) containing 68 koz Au, 224 koz Ag, 3 Mlb Cu, 53 Mlb Zn (84 koz AuEq). The company holds a 100% interest in the project.
These figures are extracted from Mineros S.A.'s technical disclosures and reflect the most recent PFS 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
- IRR after-tax
- 37.9%
higher than 66% of 369 projects we track
- NPV after-tax
- $460M
higher than 43% of 512 projects we track
- Initial capex
- $207M
45% of NPV
costlier than 42% of 481 projects we track
- Payback
- 2yrs
slower than 36% of 297 projects we track
- Mine life
- 9yrs
- Discount rate
- 5%
- Study price assumption
- Base case: US$3,150/oz Au, US$45.00/oz Ag, US$1.22/lb Zn, US$4.72/lb Cu
- Spot gold today
- $4,173.60/oz
The Hemco property sits in the upper half of the 369 projects we track on returns, with a 37.9% after-tax IRR, and its after-tax NPV of $460M ranks above 43% of the 512 projects in our database. That is a solid but unexceptional profile: the IRR clears the roughly 15% after-tax threshold developers typically need to attract project finance, and payback of 2 years is faster than 64% of the 297 projects we track. Nothing here is an outlier, so the useful question is not whether the numbers are good but what could erode them.
The constraint that matters most is the study stage. This is a pre-feasibility study, which narrows the estimate to roughly a plus or minus 25% band but is not yet a build decision. A 9-year mine life is short by the standards of the peer group, and the polymetallic mix (gold, silver, zinc, copper) adds revenue diversity but also metallurgical and offtake complexity that a PFS has not yet resolved. The 5% discount rate is a reporting convention rather than an investment hurdle, and nearly every study clears its own rate, so it tells us little about whether this project works.
Funding risk is genuinely low. Initial capex of $207M is 45% of NPV and small relative to the company's US$2.08B market cap, and this is one of 15 projects in a diversified portfolio, so the build does not depend on a single asset. The after-tax NPV is about 0.2x market cap, which cuts both ways: it can mean the market has not priced the asset, or that it is discounting the PFS stage, the Nicaraguan jurisdiction, or the short mine life. The study's US$3,150/oz gold assumption sits well below today's live spot of $4,173.60/oz, so the returns may carry upside if that price holds. The single question that decides this project: does the feasibility work confirm the resource and metallurgy at a scale that justifies a 9-year life?
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.