Mineros' Porvenir: 8 Things You Need to Know Before the 2027 Decision

Project Overview

Mineros (TSX: MSA | BVC: MINEROS | OTCQX: MNSAF) holds 100% of the Porvenir polymetallic deposit, inside the Hemco Property in Nicaragua, and the work completed to date defines it as a stand-alone underground operation. The consolidated land position runs to approximately 458,932 hectares (ha), about 230 kilometres (km) northeast of Managua, in a district that has produced approximately 8 million ounces of gold, 5 million ounces of silver, and 305 million pounds of copper since 1880. Porvenir is at the pre-feasibility stage, and Nicaragua's proven and probable reserves of approximately 861,000 ounces collectively cover Panamá, Pioneer, and Porvenir.

That grouping is the point of the project. Porvenir would be built beside 2 mines already in production, on ground the company already holds, so its development reduces to one construction decision rather than a multi-year approach.

1. The Path From Guidance to 300,000 Ounces

Porvenir's expansion increment is the step between this year's guidance range and the 300,000-ounce short-term target.

Mineros is targeting 220,000 to 240,000 gold-equivalent ounces in 2026. In 2025, the group produced 222,000 ounces, with gold-equivalent ounces sold reaching 227,000 at all-in sustaining costs (AISC) of US$2,032 per ounce. The company's stated path adds 55,000 to 72,000 gold-equivalent ounces from the Porvenir expansion on top of that guidance, against a short-term organic target of more than 300,000 ounces. Porvenir is the increment standing between current guidance and that near-term number.

President and Chief Executive Officer of Mineros, Daniel Henao, sets a destination for the growth plan:

"We have a very clear path beyond the 300,000 ounces."

The distance between the guidance and the target is one block.

2. Detailed Engineering & the Independent Gap Analysis

Detailed engineering has begun on the main project components after a consortium of outside engineering firms reviewed the technical work behind them.

Mineros engaged BBA Inc., NCL Ingenieria y Construcción, Mining Plus, and Tanka Engineering to conduct a gap analysis of Porvenir's technical parameters, following an independent engineering review of the updated pre-feasibility study (PFS) announced on March 31, 2026. The review confirmed the project's readiness, and detailed engineering has already commenced on the main components.

The study came first, the gap analysis tested it, and the engineering that follows a positive review is now in progress. On the engineering side, the schedule no longer waits on studies.

3. Drilling Aimed at the First 3 Years of the Mine Plan

The drilling campaign now underway targets the start-up window and the processing flow sheet, not the resource base.

The program is designed to reduce geological uncertainty, de-risk the first 3 years of the underground mine plan, and support the metallurgical test work being conducted as part of the detailed engineering for the processing plant. The stated intent is to raise confidence in both the initial production profile and the flow sheet, the pairing that determines whether a new underground operation hits its first-year numbers.

Asked what de-risking means in practice, Henao answers in the present tense:

"We are de-risking it."

No metreage, rig count, or budget has been given for this campaign, so its scale is not measurable from the outside. Its target is.

4. Early Works Ahead of a Decision

Early works are being prepared only where permits are already in place, which shortens the interval between decision and mobilization.

Mineros is preparing to initiate early works at the Porvenir site in areas where the required permits have been obtained, with the stated purpose of enabling rapid mobilization should a construction decision be made. The work covers site accesses, preliminary earthworks, and surface platforms.

Henao locates the site against the mines already running:

"This is a project that is just immediately southwest of our two producing mines."

Roads, power, and operating teams are therefore in place before the build begins.

5. Permits Targeted Before the Construction Decision

The construction decision is scheduled after environmental approvals, which are targeted for issuance before the end of 2026.

On July 22, 2026, Mineros hosted a site visit by representatives of the Ministry of the Environment and Natural Resources (MARENA), the Secretariat of Natural Resources and the Environment (SERENA), and the Environmental Commission for Natural Resources and the Environment (CARENA), both of the North Caribbean Coast Autonomous Region, and the municipal mayor's office. The visit was part of the work required to obtain approvals for forest management of the tailings storage and processing plant facilities. A hydrological study is being developed to support an application for industrial water use at the mine and processing plant, which, if granted, would be issued as a concession title by the National Water Authority (ANA). 

Both approvals are targeted for issue before the end of 2026, ahead of a construction decision in early 2027. Mineros is sequencing its technical and engineering work to be positioned to finalize the construction decision once permitting is fully approved. For an investor tracking this project, the regulatory calendar is the schedule that moves the decision date.

6. Pre-Feasibility Economics Behind the Increment

The ounces come with a defined capital requirement rather than an open-ended one. 

The PFS gives an after-tax net present value at a 5% discount rate (NPV5%) of US$460M, an after-tax internal rate of return (IRR) of 37.9%, a payback period of 2.0 years, a mine life of approximately 9 years or more, an AISC of US$1,295 per gold-equivalent ounce, and an initial capital of US$206.8M. The base case uses US$3,150 per ounce for gold, US$45.00 per ounce for silver, US$1.22 per pound for zinc, and US$4.72 per pound for copper, and all gold-equivalent figures at Porvenir are calculated using those prices.  

Behind the economics are proven and probable reserves of approximately 736,000 gold-equivalent ounces, plus a measured and indicated resource exclusive of reserves. The project's AISC estimate of US$1,295 per gold-equivalent ounce compares with the group's all-in sustaining cost guidance of US$2,370 to US$2,470 per ounce for 2026, versus an actual US$2,235 per ounce in the first quarter. 

7. The Capital Ask & the Unstated Funding Path 

The 2026 capital plan holds no Porvenir line, and no funding structure for the initial capital has been described.    

Capital investment for 2026 is US$113.7M, split US$51.7M growth, US$44.7M sustaining, and US$17.3M exploration, with no Porvenir allocation broken out inside it. Liquid assets stood at US$217M in cash and gold-backed assets at the end of the first quarter of 2026, against US$30M of dividends declared for 2026 and a US$80M buyback authorized over 3 years.

The structure is absent. No debt facility, equity plan, or cash allocation has been described for the US$206.8M in initial capital, and no first production or commissioning date has been provided. Both are questions a construction decision would have to answer, and neither has an answer in the public record today.  

8. The Remaining Increments in the Growth Path

The other steps on the path are brownfield de-bottlenecking and district deposits that hold resources without reserves. 

The 20,000-ounce de-bottlenecking increment is attributed to Hemco's Cleopatra and Orpheus, and the final step to 500,000 ounces by 2030 is attributed to the Porvenir District, La Pepa, and Tolima against a 2.6-million-ounce resource. Nicaragua inferred resources across Hemco reach approximately 864,000 ounces.

Within the district, Guillermina holds measured and indicated resources of 135,000 gold-equivalent ounces, with a further 96,000 inferred; Leticia holds 40,000 measured and indicated, with 14,000 inferred; and San Antonio holds 125,000 inferred. These deposits are at an earlier stage of evaluation than Porvenir and, while each hosts a resource estimate, none has reserves. There is no certainty that they will advance to a stage that could contribute to an extension of the Porvenir mine life, which is the distinction between the second increment on the path and the fourth.   

Key Takeaway for Investors

• Porvenir's expansion, from 55,000 to 72,000 gold-equivalent ounces, is the step between the 2026 guidance of 220,000 to 240,000 ounces and the short-term target of more than 300,000 ounces. 
• Forest management approvals for the tailings storage and processing plant facilities and an industrial water-use concession are targeted for issuance before the end of 2026, ahead of a construction decision in early 2027.
• The pre-feasibility study gives a net present value at a 5% discount rate of US$460M, an internal rate of return of 37.9%, and a 2.0-year payback on initial capital of US$206.8M, based on a base case of US$3,150 per ounce for gold.
• Detailed engineering has begun on the main project components after a gap analysis by a consortium of outside engineering firms, and the drilling now underway targets the first 3 years of the underground mine plan. 
• The 2026 capital investment of US$113.7M includes no Porvenir allocation, and no funding structure for the project's initial capital has been described.

The decision Mineros faces in early 2027 is narrower than a typical build decision because the study, engineering review, infill drilling, and early works will all be behind it by then. What will not be behind it is the money and the paperwork, and of those two, the paperwork has a date.  

Bottom Line

Porvenir is the difference between a company producing 240,000 ounces and a company producing more than 300,000. Everything Mineros has done since March 2026 has moved the project closer to a construction decision without committing construction capital, and the approvals targeted for the end of 2026 will allow that decision to be made in early 2027. Investors watching this name have a regulatory date to work with and an unanswered funding question to price.