


Oyu Tolgoi is one of the world’s largest copper-gold mining projects and Mongolia’s flagship foreign-investment success story. The project demonstrates how long-term international investment can combine capital, advanced technology, global expertise and local capability to develop a world-class mining operation. Operated by Oyu Tolgoi LLC, the project involves Rio Tinto, Turquoise Hill Resources and the Government of Mongolia. The mine has an expected operating life of more than 50 years. Beyond mineral production, Oyu Tolgoi has become a major contributor to Mongolia’s public finances and domestic supply chains. In 2025, the company contributed MNT 2.34 trillion in taxes, fees and other payments, while its domestic procurement, salaries and government payments generated MNT 8.4 trillion in economic activity.
5 Key Investment & Economic Impact KPIs
| US$16+ billion | Investment in the development of the Oyu Tolgoi complex |
| US$6.3 billion | Cumulative taxes, fees and other payments since 2010 |
| 97%+ Mongolian workforce | Share of employees who are Mongolian nationals |
| US$15 billion | Cumulative in-country procurement since 2010 |
| 500,000 tonnes/year | Target annual copper production during the 2028–2036 ramp-up period |









