Mining Investment in Argentina: What RIGI Solves and What It Does Not

Argentina is currently the market in the region where the fiscal incentive does most of the work. RIGI changed the arithmetic for copper projects that had gone decades without advancing — and it has an expiry date.

What RIGI is, and why the calendar matters

The Large Investment Incentive Regime offers thirty years of tax, foreign-exchange and customs stability to projects above investment thresholds set by sector. For large-scale mining, it is the difference between a financial model that closes and one that does not.

The point most often missed is that the window to apply for admission is finite. Decree 105/2026, of February 2026, extended the admission deadline by one year — to July 2027 — and introduced substantive changes to the regime. A project now in feasibility that plans to apply “when it is mature” may arrive too late for the single advantage that made the jurisdiction attractive.

Where the money is

According to the Rosario Board of Trade survey published in June 2026, projects worth more than US$133 billion had been submitted to RIGI, of which somewhat over 22% of the capital had formal approval. The composition:

• Energy: US$85.456 billion, 64% of the total, led by oil and gas and LNG.
• Mining: on the order of US$46 billion, of which roughly US$31.5 billion is copper.
• Provincial concentration: Neuquén at about 47%, San Juan at 19% and Río Negro at 15%.

In August 2026 the government approved five more projects — among them Vicuña, of BHP and Lundin, in San Juan, at US$9.7 billion, and two lithium projects in Catamarca and Salta — and reported 23 approved projects with commitments of some US$46.7 billion. The composition tells the essential story: Argentina is becoming a copper jurisdiction after decades of not producing it.

What RIGI does not solve

Three things, all of them underestimated from abroad.

The permit is provincial. The Argentine Constitution assigns original ownership of natural resources to the provinces. RIGI is national and fiscal; environmental approval, mining title and the relationship with communities are settled in San Juan, Catamarca, Salta or Santa Cruz, each with its own administration, capacity and electoral calendar. A project can hold RIGI approval and still not be permitted to move earth.

Infrastructure is not included. Argentina's Andean copper projects are far from port, far from transmission, and often on the other side of a border pass. The reactivation of the mining integration treaty with Chile, announced in 2026, matters precisely for that reason: for several of these projects the natural logistics are Chilean.

The stability is contractual, not macroeconomic. RIGI shields the project from tax and exchange changes, and that shield has been tested before in Argentina. It is a risk that can be structured — arbitral seat, vehicle, insurance — but it has to be structured explicitly rather than assumed away.

How a foreign investor enters

1. Define the vehicle before the asset. RIGI admission runs through a single-project vehicle with its own requirements; the corporate structure conditions the benefit, not the other way round.
2. Read the province the way you read a country. Technical capacity of the environmental agency, conflict record, electoral calendar and royalty regime: these are four distinct jurisdictions, not one.
3. Check binational logistics early. If the outlet is through Chile, two regulatory frameworks sit on the same schedule.
4. Put a date on RIGI. Work toward July 2027 as a hard constraint of the plan, not a desirable target.

Sources: Decree 105/2026, Official Gazette (19 Feb 2026); Rosario Board of Trade, Weekly Report (Jun 2026); official announcements of RIGI approvals, August 2026. Last reviewed: September 2026. General information, not legal advice.