Australia’s Oil Refining Challenges and Dependence on the Strait of Hormuz

Australia currently refines only 20% of the petroleum it consumes, leaving the country heavily dependent on imports and the stability of the Strait of Hormuz for its energy security. According to reports analyzed on July 29, 2026, the Australian government is considering the construction of new refining capacity to reduce this vulnerability.

The current refining gap means the vast majority of Australia’s fuel is processed overseas. This reliance creates a strategic risk, as a significant portion of the crude oil and refined products destined for Australian shores must pass through the Strait of Hormuz, a critical maritime chokepoint prone to geopolitical volatility.

Australia’s Refining Capacity and Energy Vulnerability

With only one-fifth of its petroleum needs met by domestic refining, Australia faces a structural deficit in its energy infrastructure. This dependency forces the nation to rely on global supply chains that are susceptible to disruption from regional conflicts or maritime blockades.

The Strait of Hormuz serves as the primary transit route for the oil imports required to fill this gap. Any closure or restriction of this waterway would immediately threaten the supply of fuel necessary for transport, industry, and power generation across the continent.

Proposed Infrastructure Expansion

To mitigate these risks, Australian authorities are evaluating the feasibility of building new refineries. Increasing domestic refining capacity would allow the country to process more of its own crude oil and reduce the volume of finished petroleum products that must be shipped from overseas.

The move toward expanded refining is framed as a national security measure. By shifting the processing of oil to domestic soil, Australia can decrease its exposure to the logistical risks associated with the Strait of Hormuz and other volatile transit corridors.