Rio Tinto has reached a revised agreement with the Government of Mongolia over the shareholder-loan interest rate at the Oyu Tolgoi copper-gold project, reducing a major political dispute surrounding one of the world’s largest copper growth assets.
The agreement addresses a long-running issue between Rio Tinto and Mongolia regarding financing terms for the project, while also including cooperation on the Entrée mine lease areas and efforts to accelerate shareholder distributions.
Oyu Tolgoi remains a central asset in Rio Tinto’s copper portfolio and Mongolia’s largest foreign investment project. The mine is owned by Rio Tinto with a 66% stake and the Mongolian government through Erdenes Oyu Tolgoi with a 34% interest.
Oyu Tolgoi production outlook remains central to copper strategy
Rio Tinto said Oyu Tolgoi remains on schedule to reach average annual production of approximately 500,000 tonnes of copper between 2028 and 2036. The production profile places the project among the most significant future copper supply developments globally as demand increases across sectors including electrification, power networks and data-centre infrastructure.
The company reported that Oyu Tolgoi currently employs around 17,000 people, with 97.8% of employees being Mongolian nationals. Since 2010, the project has generated $6.1 billion in taxes, fees and other payments for Mongolia.
Revised shareholder-loan terms address financing dispute
The new agreement adjusts the interest rate applied to the shareholder loan in accordance with the requirement for periodic reviews under the shareholder agreement. Rio Tinto and Mongolia also agreed to cooperate on issues connected to the Entrée mine lease areas, while working to bring forward shareholder distributions from the project.
The financing dispute has been closely linked to broader questions over how and when Mongolia benefits financially from its ownership position in Oyu Tolgoi. According to a report by the Financial Times, the revised arrangement includes a 50% reduction in Rio Tinto’s management fees and a 2.5 percentage-point reduction in interest charged on Mongolia’s shareholder loan.
Dividend timeline and tax issues remain unresolved
Despite the revised agreement, uncertainty remains over the timing of dividend payments to Mongolia from its 34% ownership stake. The Financial Times reported that dividend distributions could be delayed until around 2037. Rio Tinto also continues to face a tax dispute in Mongolia.
The timing of shareholder returns remains a key issue because Oyu Tolgoi’s economic benefits depend not only on copper production volumes but also on the structure and timing of financial distributions between the partners.
Political risks remain alongside underground expansion
The agreement reduces political tension surrounding Oyu Tolgoi, but several issues continue to influence the project’s future valuation. These include the performance of the underground expansion, future shareholder distributions, progress related to the Entrée lease areas and continued political support for the project in Mongolia.
Oyu Tolgoi’s long-term importance is linked to its production potential, ownership structure and role as a major source of future copper supply. However, the project’s financial outcomes remain influenced by negotiations between Rio Tinto and the Mongolian government alongside operational performance.
