Colombia’s Promigas Takes Peru to a World Bank Tribunal

Business

A Colombian gas company is taking Peru to a World Bank tribunal. Promigas has launched a Promigas arbitration against the Peruvian state over gas-distribution tariffs it says are unfair enough to threaten hundreds of millions in investment.

Promigas is one of Colombia’s largest natural-gas distribution groups, and it also operates in Peru, where it has been expanding the network that pipes gas to homes and businesses.

Now a tariff fight has pushed it toward an international court.

The Tariff Dispute

At the heart of the case is a decision by Peru’s energy regulator, Osinergmin, to set gas-distribution tariffs for 2025-2028 that cut rates by about 32%, against the terms Promigas says it agreed to in a concession contract that ran to 2024.

The company calls the new tariffs arbitrary, unfair, irrational and discriminatory.

How It Reached ICSID

Promigas filed a request for consultation and negotiation in February 2025 and a notice of intent to arbitrate in November. When talks with the Peruvian state failed to resolve the dispute, it took the case to the International Centre for Settlement of Investment Disputes, part of the World Bank Group.

ICSID is the main forum where foreign investors sue governments over treatment of their investments.

What Is at Stake

Promigas says the tariff cut puts about US$335 million of planned investment over eight years at risk, money meant to extend gas service to 340,000 homes and roughly 1.2 million people.

In other words, the company argues the dispute is not just about its returns but about how fast gas reaches Peruvian households.

Why It Matters

Investor-state arbitration cases are closely watched because they test the balance between a government’s right to regulate and an investor’s right to stable terms.

For Peru, a run of such disputes over energy tariffs could weigh on the investment it needs to expand gas access.

What Is at Stake for Peru

Peru has spent years trying to widen access to natural gas beyond Lima, where households enjoy far cheaper energy than the rest of the country. Promigas’s Peru business has been a central player in extending that network across the north.

The tariff cut at the heart of the dispute would lower what the company can charge, reshaping the economics of running pipes to new towns. Promigas argues it squeezes the returns needed to keep building.

Peru’s government sets tariffs to shield consumers from paying more than necessary, a balance regulators everywhere must strike. Osinergmin has defended its approach as within its mandate.

An ICSID case can take years and cost both sides heavily, whatever the result. It also signals to other investors how Peru handles disputes over regulated returns.

Frequently Asked Questions

Why is Promigas suing Peru?

Promigas filed for international arbitration at the World Bank’s ICSID over 2025-2028 gas-distribution tariffs set by regulator Osinergmin, which cut rates about 32% against the terms of its concession.

How much is at stake?

Promigas says about US$335 million in planned investment over eight years is at risk, money meant to bring gas to 340,000 homes and about 1.2 million Peruvians.

What is ICSID?

The International Centre for Settlement of Investment Disputes is part of the World Bank Group and is the main forum where foreign investors bring claims against governments over their investments.

Sources

• Bloomberg Linea – Promigas inicio arbitraje internacional contra Peru por tarifas de distribucion de gas
• Gestion – Promigas decide llevar a Peru ante el Ciadi por tarifa de concesion

Connected Coverage

• Colombia’s Promigas Ends Its Gas Contracts With Canacol
• Silver X Expands Peru Drill After 735 g/t Silver Find

Sources: Promigas; Osinergmin; World Bank's ICSID.