Hochschild Bets $511M to Revive a Mine It Wrote Off in 2023

In late 2023, Hochschild Mining wrote Pallancata off. The underground silver-gold mine in southern Peru had exhausted its reserves, and the site entered care and maintenance with no published path back to production. Two and a half years later, the company is committing US$511 million over a 19-year lifecycle to restart the same operation, targeting 100,000 oz AuEq per year from 2028.

The catalyst is Royropata, a brownfield discovery made just 700 metres from existing workings in 2022. What started as an initial inferred resource of roughly 51 Moz AgEq has grown into a combined Measured & Indicated and Inferred inventory exceeding 270 Moz AgEq as at December 2025, with more than 1 Moz AuEq added in a single year. The restart is not speculative. It has a defined regulatory pathway through Peru’s Senace environmental review process, a citizen participation plan already approved, and a formal submission targeted for this month.

The question for investors is not whether Pallancata has a second life. It is whether the geological, economic, and regulatory pieces converge on that 2028 production date, or whether any one of them slips. Here is the evaluative framework for tracking all three.

What Royropata actually is, and why it changes the Pallancata calculus

Before Royropata, Pallancata was a depleted asset. The original ore body had been mined out, and the site’s future was limited to closure obligations and post-closure monitoring. There was no geological basis for a restart.

Royropata changed that equation because of where it sits, not just what it contains. Sitting roughly 700 metres from the Pablo Zone, the deposit is near enough to draw on most of the existing surface and underground infrastructure at Pallancata, including the Selene processing plant. That proximity is the difference between a brownfield extension with manageable capital intensity and a standalone greenfield project requiring an entirely new processing facility.

The deposit itself is an epithermal vein system, a type of mineralisation formed by hot fluids circulating near the surface, carrying silver and gold into fractures in the rock. When the initial inferred resource was published in 2022, the grades were striking: 1.88 Mt at 667 g/t Ag and 2.42 g/t Au, containing approximately 51 Moz AgEq. Those grades sit well above the average for underground silver-gold projects globally, and they signalled that the deposit had the concentration to support economic extraction even at conservative metal prices.

Epithermal silver systems form when hydrothermal fluids carry precious metals into near-surface fractures at relatively low temperatures and pressures, a process that often concentrates silver and gold into narrow but exceptionally high-grade veins, which is precisely what gives Royropata its economic appeal despite its modest tonnage at initial discovery.

From first discovery to a 206 Moz AgEq inferred inventory

The resource base has grown substantially since that initial estimate. By December 2025, the combined Pallancata/Royropata area reported Measured & Indicated resources of 3.91 Mt at 420 g/t Ag and 1.46 g/t Au (819 koz AuEq / 67.9 Moz AgEq), alongside Inferred resources of 11.9 Mt at 409 g/t Ag and 1.57 g/t Au (approximately 2.5 Moz AuEq / 206 Moz AgEq). Resource pricing assumptions for the 2025 statement used Au US$2,900/oz and Ag US$32/oz, an 83:1 silver-to-gold ratio.

Resource growth in 2025 alone exceeded 1 Moz AuEq at Pallancata/Royropata, underscoring the scale of additions from ongoing drilling across 14 mineralised structures spanning the Royropata, Huararani, Ranichico, and Rina zones.

The trajectory is compelling, but the classification matters. The overwhelming majority of the current inventory sits in the Inferred category, meaning it is based on limited geological evidence and sampling. Inferred resources are not bankable reserves. They cannot underpin a final feasibility study or a mine plan that lenders will finance without further work. Conversion to Indicated or Measured classification requires infill drilling and geomechanical studies, both of which Hochschild has confirmed are ongoing as part of the MEIA engineering programme. Until that conversion happens, investors should treat the headline inventory numbers as a promising but unconfirmed foundation rather than a guaranteed production base.

The distinction between Inferred, Indicated, and Measured resource classification is not a technicality; it is the difference between a geological estimate that lenders will finance and one they will not, and the Pallancata inventory’s heavy weighting toward Inferred status is therefore the single most material conversion risk in the project.

The brownfield economics case: low initial capex, high infrastructure reuse

The financial logic of Royropata starts with what does not need to be built. The existing Selene processing plant remains operational. The majority of Pallancata’s surface infrastructure, underground access, and site services are intact. That reuse eliminates the single largest cost component of a typical underground mine development, namely a new processing facility, and compresses the initial capital requirement to US$75-100 million, according to Hochschild’s public guidance.

The Pallancata restart illustrates the core thesis behind brownfield capital efficiency: when processing infrastructure, underground access, and site services are already in place, initial capex can be compressed to a fraction of a comparable greenfield build, with the trade-off that lifecycle obligations over the operating period still accumulate toward a much larger total.

The construction phase scope gives a sense of what that entry capex covers:

• Ground preparation and civil works spanning excavation, vegetation removal, concrete structures, and steel fabrication
• Underground development: a new Royropata adit as the principal mine entry, reconfiguration of the Huararani adit as the secondary entry, plus ramps, crosscuts, drifts, sublevels, refuges, and raises throughout the mineralised zones
• Upgrade of electrical supply infrastructure, including extension of the 33 kV transmission line and new distribution branches to all operational facilities
• Installation of water treatment plants and associated water management infrastructure
• Auxiliary surface facilities including maintenance workshops and electrical substations to support operations

Planned construction duration is one year, with certain infrastructure elements built in parallel with initial production rather than as a prerequisite for first ore.

The headline construction figure, however, understates the total commitment. The full lifecycle capital programme under the third MEIA modification totals US$511 million, encompassing underground development across the operational life, tailings and waste facility expansions, power infrastructure, water management, and closure and post-closure obligations spanning all phases. The underground ventilation and services network alone incorporates 26 RC raise-bore shafts, reflecting the scale of the subsurface footprint required across the project’s operational zones.

\AISC figure cited in public commentary but not independently verified.*

The gap between US$75-100 million at entry and US$511 million over the project life is where the honest assessment lives. For investors benchmarking this against other brownfield silver restarts, the initial capex looks attractive; the lifecycle obligation looks like a multi-decade capital programme that requires sustained cash generation from operations to fund. The ratio between those two numbers is a more reliable measure of project scale than the construction headline alone.

The regulatory path to production: Senace, the third MEIA modification, and the 2028 timeline

Pallancata’s restart runs through a single gating process: the third modification to its existing Detailed Environmental Impact Assessment (MEIA-d), a comprehensive environmental study required under Peruvian law before mining operations can proceed or expand. The mine already holds an approved MEIA with permitted throughput of 3,000 t/d. This amendment does not seek any increase to that ceiling. Instead, it covers the new underground access development, tailings and waste facility expansions, power and water infrastructure required to bring Royropata into production within the existing operational envelope.

The scope is an amendment to an established instrument, not a new filing from scratch, which means Hochschild is working within an iterative regulatory relationship with Senace (Peru’s national environmental certification service) rather than building one for the first time. Multiple prior technical reports (Informes Técnicos Sustentatorios) and citizen participation plans have already been approved for Pallancata under earlier modification rounds.

Senace’s MEIA modification review follows a structured sequence:

1. Admissibility: Senace confirms the submission is complete and formally accepts it for review, typically within weeks of filing.
2. Technical review: Detailed assessment of the environmental, engineering, and social components of the modification by Senace’s technical teams.
3. Citizen participation: Formal community engagement and consultation processes, including public workshops and feedback periods.
4. Response to observations: The company addresses any technical or procedural questions raised during the review, followed by a final determination.

How the July 2026 election adds a layer of timing risk

The project milestone sequence tells a specific story about how Hochschild is managing regulatory timing risk:

1. Engineering and MEIA work initiated: September 2023
2. Land easements secured: 2024
3. Citizen participation plan approved by Senace: November 2025 (Resolución Directoral N° 00140-2025-SENACE-PE/DEAR)
4. Public workshops held: Pallancata community (December 2025), Iscahuaca community (February 2026)
5. Formal MEIA submission targeted: approximately August 2026 (post-July 2026 elections)
6. MEIA approval anticipated: approximately 2027 (roughly one year after filing)
7. Production restart: 2028 (current guidance; earlier guidance referenced 2027)

The deliberate post-election submission timing is not accidental. Peru’s July 2026 national elections introduce a period of regulatory uncertainty that Hochschild has chosen to avoid. Filing a major amendment into a pre-election environment risks the submission sitting idle during a transition, or worse, encountering a new administration with different permitting priorities. By targeting an August 2026 submission, the company is betting that a newly seated government will have settled into its regulatory posture by the time Senace’s review reaches decision-relevant stages.

That calculation introduces a dependency. If the post-election regulatory environment proves less stable than expected, or if the incoming administration deprioritises mining permits, the entire downstream timeline shifts. The move from an earlier 2027 production target to 2028 already reflects the realistic duration of multi-stage MEIA reviews in Peru. Investors should treat 2028 as a floor rather than a firm commitment, with extension risk skewed to the downside on timing.

The Peruvian permitting environment carries structural risks that extend beyond any single project’s regulatory timeline: community conflict, shifting political priorities, and institutional capacity constraints at agencies like Senace have historically extended review periods well beyond initial estimates, making the downstream timeline sensitivity at Pallancata a country-level consideration as much as a project-level one.

Where Pallancata sits in Hochschild’s 2028 production pipeline and what still needs to go right

Pallancata is not a peripheral project in Hochschild’s portfolio. It is one of two assets expected to move the needle on group production from 2028 onward. The other is Monte do Carmo in Brazil, also targeting first production in 2028. Alongside the operating Inmaculada mine, these two developments form the core of Hochschild’s medium-term production growth thesis as a primary silver producer focused on the Americas.

Hochschild’s management has repeatedly described Royropata as “a major discovery close to Pallancata” in annual reports and capital markets presentations, framing the restart as both a site-level transformation and a portfolio-level catalyst.

The targeted 100 koz AuEq per year from Pallancata/Royropata represents a meaningful incremental addition to group output. That also means Hochschild’s production guidance for the late 2020s is partly contingent on this project delivering on schedule. If you are evaluating Hochschild as an equity position, Pallancata’s 2028 timing risk is a group-level production risk, not an isolated project variable.

The four variables to monitor between now and first production

The distance between where this project sits today and a producing mine is covered by four risk categories, each with its own monitoring signals:

• Inferred-to-reserve conversion: The current resource base is predominantly Inferred. Watch for updated resource or reserve statements in 2026-2027 that show conversion to Indicated or Measured categories. If infill drilling results disappoint or conversion stalls, the production base narrows.
• Regulatory timing: The MEIA submission targeted for approximately August 2026 is the single gating event. Track whether the filing proceeds on schedule and whether Senace’s admissibility determination follows within the expected timeframe. Any delay here cascades directly into the 2028 target.
• Community and social licence: Two public workshops have been completed (December 2025 and February 2026), and the project has an established regulatory relationship through prior modification rounds. Monitor for any community opposition in the Ayacucho region, which has disrupted Peruvian mining projects at comparable stages.
• Precious metals price cycle: With a 10-year operational horizon and an unverified AISC estimate of approximately US$1,000-1,100 per AuEq oz, the project carries margin sensitivity to sustained silver and gold price downturns. Current price assumptions (Au US$2,900/oz, Ag US$32/oz) are favourable; a material retreat would compress the economics.

Whether the 2028 production target holds, and what the data tells you now

The geological case is strong but unfinished: a high-grade epithermal system with a growing resource inventory, but one that remains predominantly Inferred and needs conversion before it becomes bankable. The economic case is attractive at entry but carries a US$511 million lifecycle obligation that extends across nearly two decades. The regulatory case has a clear pathway and established precedent, but runs through a multi-stage review process that is election-sensitive and historically capable of delay.

Three monitoring priorities, in order of time sensitivity, tell you whether the project is converging on or diverging from the 2028 target:

1. August 2026 MEIA submission: Whether the formal filing to Senace proceeds as planned this month is the single highest-priority observable. If it slips, every downstream date moves with it.
2. Senace admissibility and technical review progress through 2026-2027: The pace at which Senace processes the modification determines whether the approximately one-year approval window holds or extends.
3. Infill drilling and resource conversion results: Any updated resource or reserve statement before 2028 will either confirm or narrow the production base that the mine plan relies on.

The 2028 production restart is achievable under the base case. It is not guaranteed. Investors who understand the specific milestones, the sequencing, and the dependencies now have the framework to monitor this thesis actively rather than reacting to headline updates in isolation.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. Forward-looking statements regarding production timelines, resource estimates, and capital expenditure are subject to regulatory outcomes, market conditions, and various risk factors. Past performance does not guarantee future results.