Power costs reach into household budgets, business margins and the prices consumers pay. While petrol attracts daily attention, electricity remains a persistent economic burden.

A petrol price increase announces itself on a roadside sign. An electricity bill delivers its message more quietly, arriving after the power has already been consumed.

For households and businesses, however, the consequences can be just as difficult to manage.

Electricity is an essential expense with limited room for avoidance. Families can moderate consumption, and businesses can invest in efficiency, but refrigerators, equipment, lighting and communications still require power.

The latest inflation figures underline its significance.

Australian Bureau of Statistics data show electricity costs rose 12.8% over the year to September 2026. Electricity was among the contributors to rising housing costs, alongside rents and new dwellings.

That headline requires explanation. It also raises a broader question: how much economic pressure sits inside the power bill?

When relief ends, the bill rises

The ABS attributes much of the annual electricity increase to the ending of Commonwealth electricity rebates.

That distinction matters. A rise in the electricity component of the Consumer Price Index does not necessarily mean retailers increased everyone’s tariffs by the same percentage. The index reflects the prices households pay, including the effect of government assistance. When rebates expire, measured electricity costs can rise even without an equivalent increase in the underlying tariff.

For the household paying the bill, the distinction offers little immediate comfort. More money must come from the same income.

But it matters for public policy. Temporary assistance can reduce bills while it operates. Making electricity durably more affordable requires attention to the costs of supplying it.

A rebate can cushion an expense. It does not, by itself, remove that expense from the economy.

An impost on doing business

For a business, electricity is part of the cost of opening the doors.

A supermarket needs refrigeration throughout the night. A bakery needs power before its first customer arrives. A workshop must run equipment, while a motel must provide hot water, lighting and comfortable rooms.

These expenses arise before the owner knows how much revenue the day will bring.

When electricity costs increase, businesses can absorb them through lower profits, attempt to recover them through prices, or reduce other expenditure. Each response has consequences.

Lower margins leave less room for equipment replacement, expansion and unexpected setbacks. Higher selling prices put pressure on customers. Cuts elsewhere can affect service, investment or staffing.

These are the channels through which an electricity cost increase can spread beyond the business receiving the bill. The extent depends on competition, customer demand and how heavily an operator relies on power.

A household electricity index cannot measure all of that pressure.

The evidence needs care

It would nevertheless be inaccurate to claim that every business is currently experiencing rising electricity tariffs.

The Australian Energy Regulator’s Default Market Offer determination for 2026–27 reduced small-business standing-offer prices across New South Wales, south-east Queensland and South Australia from July 1.

Depending on the distribution area and tariff type, the announced reductions ranged from 6.8% to 20.9%. The regulator attributed the outcome to easing costs across much of the supply chain, particularly wholesale energy.

That is meaningful relief for affected customers.

However, the Default Market Offer covers particular customers and jurisdictions. It is a safety net for standing offers and a benchmark against which market offers can be compared. It does not describe every commercial contract or electricity bill in Australia.

The AER estimates that about 15% of small businesses in the markets covered are on the Default Market Offer. Actual bills also depend on consumption and the structure of the customer’s tariff.

The accurate picture is therefore more complicated than a single claim that electricity is becoming universally dearer or cheaper.

Some regulated prices have fallen. Household inflation has been lifted by expiring assistance. Businesses continue to face electricity expenses that vary substantially by location, contract and usage.

Why the Reserve Bank cares

Electricity presents a difficult problem for monetary policy because it is both a household purchase and an input into other economic activity.

Higher household power bills contribute directly to measured inflation. Higher business power costs can also influence selling prices, although businesses cannot always pass them on.

Interest rates do not directly build transmission lines, repair generators or reduce a retailer’s supply charge. Their role is to influence demand and the broader conditions in which businesses set prices.

The Reserve Bank is also concerned about inflation becoming accepted as normal.

On October 21, Deputy Governor Andrew Hauser warned that the inflation outlook had become “materially worse” than the bank’s August projections. He highlighted persistent cost pressures and the risk that businesses would come to expect inflation to remain above target. His warning concerned the broader economy, rather than electricity alone.

Electricity belongs in that discussion because its effects reach well beyond the meter.

Affordability must last beyond the next bill

For households, the practical test is whether reliable power leaves enough money for other essentials.

For businesses, it is whether energy costs allow them to operate competitively, invest and earn a sustainable return.

Those tests demand more than attention when a rebate begins or ends. They require scrutiny of the full bill, the choices available to customers and the underlying cost of supplying reliable electricity.

Petrol will continue to command attention whenever roadside prices move.

Electricity deserves sustained attention too. Its bill reaches into almost every home, and its cost is embedded in much of what Australia produces and sells.