Australia’s fuel problem does not require empty service stations to cause economic damage.

Petrol and diesel can remain available while their prices squeeze household budgets, raise business costs and make the task of controlling inflation harder.

That is the quieter consequence of expensive oil. The immediate concern about obtaining fuel gives way to the continuing burden of paying for it—and paying for the goods and services that depend on it.

Fresh hopes of a diplomatic breakthrough in the Middle East have offered some relief. Reuters reported Brent crude trading around US$105 a barrel during Monday’s session, down more than 7 per cent as talks involving Iran and Qatari mediators encouraged expectations of an agreement. That was an intraday price, rather than a closing settlement, and the diplomatic outcome remained uncertain.

For Australian consumers, however, a fall on an overseas trading screen does not immediately reverse the costs already moving through the economy.

Fuel is arriving. It remains expensive.

The Australian Government’s latest fuel update says imports continue to arrive at the expected frequency and volume, with sufficient forward orders scheduled for the following four weeks. It describes national stocks as healthy, although individual service stations can still experience outages.

The same update records average petrol prices of $2.34 a litre across the five largest capital cities on 28 October, with diesel averaging $2.77.

Those prices were below the peaks reached earlier in the conflict. They nevertheless represent a substantial expense for motorists and businesses.

The distinction matters. Maintaining deliveries protects the functioning of the economy. It does not protect consumers from the price of those deliveries.

The second fuel bill arrives through other purchases

Households see their own fuel costs immediately. The additional costs embedded in other purchases are harder to identify.

Diesel powers trucks delivering groceries, equipment and building materials. It also powers machinery used in agriculture, construction and other industries.

When fuel becomes more expensive, a business must decide how much of the increase it can absorb, how much it can offset through efficiencies and how much it must recover from customers.

The following effects are an economic assessment of how those pressures can spread, rather than a claim that every business has already increased its prices.

A transport operator may adjust a fuel surcharge. A supplier may revise delivery charges. A tradesperson may increase call-out fees or allow more for travel when quoting. A producer may accept a smaller margin until the next contract provides an opportunity to recover costs.

These adjustments occur on different schedules. Consequently, the effects of a sustained fuel shock can continue appearing after the original oil-price surge has faded from the headlines.

Consumers may encounter the result as a more expensive repair, delivery or grocery purchase, without seeing a separate line identifying fuel as a contributor.

Households have less money left

For households, expensive fuel also changes what remains available to spend elsewhere.

Consider an illustrative household buying 60 litres of petrol a week. A price increase of 40 cents a litre adds $24 to its weekly bill, or $1,248 over a year if both consumption and the price difference persist.

That money must come from savings, additional income or reduced spending.

For someone driving to work, taking children to school or attending medical appointments, cutting fuel consumption may be difficult. The adjustment is more likely to fall on meals out, entertainment, clothing or other purchases that can be postponed.

Businesses can therefore face pressure from both directions: higher operating costs and customers with less money to spend.

This is how a fuel shock can weaken economic activity while also lifting prices.

Regional Australia has fewer alternatives

The burden can be particularly difficult outside metropolitan areas.

Longer distances between homes, workplaces, shops and essential services mean driving is often unavoidable. Public transport may offer limited help.

Regional businesses also rely on freight travelling considerable distances. Farmers and contractors may have little scope to reduce machinery use without reducing production or delaying work.

The precise exposure varies, including because eligible businesses can receive fuel tax credits. Nevertheless, sustained increases in the underlying cost of fuel remain a commercial pressure.

A national average bowser price cannot fully describe the consequences for a household travelling hundreds of kilometres each week or an enterprise operating several diesel vehicles.

Why inflation can remain troublesome

Fuel affects inflation directly through motorists’ purchases and indirectly through business costs.

However, an elevated price and a continually rising price are different things.

A one-off increase raises the price level and temporarily lifts measured inflation. If fuel then remains at that higher level, its direct contribution to annual inflation eventually diminishes as the comparison period catches up.

Households still face the higher bill.

Meanwhile, delayed changes to freight charges, supplier contracts and retail prices can spread the adjustment over time. Falling crude prices may help, but the timing and extent of relief depend on refined fuel prices, exchange rates, inventories and competition.

The Reserve Bank’s August outlook explicitly identified the risk that conflict-related costs could pass through to consumer prices more strongly than expected. Its forecasts assumed those pressures would eventually unwind.

The economic concern is therefore persistence: how long the pressure lasts, how widely it spreads and whether it changes expectations about future prices.

An awkward problem for interest rates

Australian interest rates cannot resolve a conflict overseas, reopen a shipping route or increase refinery production.

They can influence domestic borrowing, spending and demand.

That creates a difficult judgement for the Reserve Bank. It must assess whether an external price shock is likely to fade or become part of a broader, more persistent inflation problem.

Higher fuel prices alone do not automatically require an interest rate increase. They can also restrain spending by leaving households poorer after essential expenses.

But if rising costs spread widely and inflation remains persistent, the path to lower interest rates becomes more difficult.

For borrowers, that is another possible consequence of the fuel bill—alongside the immediate expense of filling the tank.

The Times View

Australia’s fuel position should be judged by availability, affordability and the effects on the wider economy.

Reliable deliveries are reassuring. Sustained relief in the cost of petrol, diesel and freight would provide a different and much broader benefit.

The latest fall in oil offers some hope. The test will be whether it lasts and reaches Australian households and businesses.

Until then, expensive fuel continues to consume income, compress margins and complicate the inflation outlook.

The economy can keep moving while becoming more expensive to run.