How a $120 Brent oil price (sustained shock) affects the Australia economy — inflation, fuel, food, and household costs

A sustained Brent crude oil price of $120 per barrel would reverberate through the Australian economy, triggering significant increases in inflation and placing substantial pressure on household budgets. Businesses and consumers alike need to understand the direct and indirect impacts of such a shock to prepare for rising operational and living costs.

Fuel Costs: The Immediate and Visible Impact

The most immediate and obvious impact of $120/barrel Brent is on fuel prices at the pump. Australia is a net importer of refined petroleum products, making it highly susceptible to international crude price fluctuations. Historically, a $10 increase in crude oil prices has translated to approximately a 7-8 cent per litre rise in Australian petrol prices, though this can vary. With Brent at $120/barrel, compared to a baseline of $80/barrel (a $40 increase), Australian petrol prices could climb by an additional 28-32 cents per litre. Assuming an average unleaded price of $1.80/litre at $80/barrel Brent, this could push prices to a range of $2.08-$2.12/litre.

For a typical Australian household driving 15,000 km annually in a car consuming 10 L/100km, the annual fuel bill would increase dramatically. At $1.80/litre, annual fuel costs are $2,700. If prices rise to $2.10/litre, this jumps to $3,150, representing an annual increase of $450, or $37.50 more per month. Businesses reliant on transportation, such as logistics companies, tradespeople, and rural enterprises, would face proportionally larger increases, directly impacting their operating margins. For instance, a small delivery business with a fleet consuming 500 litres per week would see its weekly fuel bill rise from $900 to $1,050, an extra $600 per month. Businesses should consider fuel surcharges, route optimisation, and investment in more fuel-efficient vehicles.

Inflationary Pressure: Broader Economic Ripples

Rising fuel costs are a primary driver of broader inflation. Known as "cost-push" inflation, the increased expense of transportation for goods and services filters through supply chains. Every item transported from farm to supermarket shelf, from raw materials to finished products, incurs higher freight costs. The Reserve Bank of Australia (RBA) would likely face pressure to raise interest rates further to curb this inflation, impacting mortgage repayments and borrowing costs for businesses.

While the exact inflation impact is complex, analysis by the RBA and other economic bodies often suggests that a sustained $10/barrel increase in oil prices can add 0.1-0.2 percentage points to annual CPI inflation. At a $40/barrel increase from baseline ($120 vs. $80), this could translate to an additional 0.4-0.8 percentage points on Australia's headline inflation rate. If current inflation hovers around 4.0%, a $120 Brent scenario could push it towards 4.4-4.8%, prolonging the period of elevated cost of living. Businesses should review pricing strategies, input costs, and consider hedging against energy price volatility where feasible.

Food and Household Costs: The Everyday Squeeze

The impact of $120/barrel Brent extends beyond direct fuel costs to virtually all household expenditures, notably food. Australia's vast distances mean agriculture is heavily reliant on road transport for distribution. Fuel is also a significant input in farm machinery operation, fertiliser production (a highly energy-intensive process), and food processing.

Consider a basket of common household groceries. Transport costs typically represent 5-10% of the final retail price for many goods. If fuel costs increase by 15-20% (from $1.80 to $2.10/litre), this could add 1-2% to the retail price of food items over time, compounding other inflationary pressures. For a household spending $200 per week on groceries, this could mean an extra $2-$4 per week, or $8-$16 per month. This seems modest in isolation but adds to rising fuel, utilities (often energy-linked), and mortgage costs, creating a significant cumulative burden. Businesses in the food sector, from producers to retailers, must factor in increased logistics and production costs, potentially leading to lower margins or higher consumer prices. Diversifying supply chains, negotiating freight contracts, and optimising logistics can help mitigate these impacts.

What businesses can do: Review operating budgets, focusing on energy consumption. Explore renewable energy options for facilities. Engage with suppliers to understand their exposure to freight costs. Communicate transparently with customers about unavoidable price adjustments.

A sustained $120/barrel Brent oil price shock would impose substantial economic challenges on Australia, manifesting as higher fuel prices, elevated inflation, and increased costs across entire supply chains. Businesses and households must brace for these impacts and implement strategic adjustments to navigate the more expensive economic landscape.

Try the PriceShock simulator at https://priceshock.app to model your own scenario.