Rio Tinto & Tomago Aluminum: Securing Australia's Supply

Tomago Aluminum and Rio Tinto have agreed a long-term power deal to provide an assured supply through 2038.

Australia’s largest aluminium smelter will fund the new agreement with US$778.39m worth of investments across the next 12 years.

This includes a 10 year power purchase agreement for renewable electricity supply to the Tomago Aluminium which begins in December 2028.

The agreement extends Rio Tinto’s presence in Australia after securing the long term future for Boyne aluminium smelter at Gladstone in March 2026.

Rio Tinto Aluminium & Lithium Chief Executive Jérôme Pécresse said: “This agreement secures Tomago Aluminium's long-term future, supporting Australian manufacturing, skilled jobs and the Hunter community, as well as providing security of supply to the smelter’s global customers.”

The Tomago power agreement

Tomago Aluminium has worked alongside the Australian Government and New South Wales Government to secure a deal with Rio Tinto.

The company is an independently managed joint venture between Rio Tinto, Gove Aluminium Finance and Norsk Hydro.

This deal is expected to provide long-term certainty for Tomago Aluminum, while also securing its workforce, customers and the Hunter region.

Rio Tinto is aiming to deliver reliable and internationally competitive power to Australia’s leading smelter until 2038.

By 2033, the power supply is expected to be made up from 100% renewable sources

After fulfilling this ambition, Tomago Aluminium says it will reduce Scope 1 and 2 operating carbon emissions by 7.1 million tonnes per year.

Securing Australia's aluminium industry

Rio Tinto is a multinational mining company that is listed in both the United Kingdom and Australia.

It reached an almost identical deal in March 2026 with the Commonwealth Government and Queensland Government to secure the Boyne aluminium smelter.

This means Australia’s two largest aluminium smelters now have confirmed paths to competitive, long term and low carbon power.

According to Tomago, it produces up to 590,000 tones of aluminium per year, almost 40% of Australia’s total annual aluminium production.

The company has more than 1,000 employees, alongside supporting around 5,000 indirect jobs and more than 200 full-time equivalent contractors.

It is also New South Wales’ biggest electricity user, able to stabilise the state’s grid during low periods.