The largest single item on a typical Australian electricity bill is not the electricity. It is the poles, wires and substations that deliver it, and the rules setting how much networks can charge for that are being rewritten right now. Consumer and social sector groups went public on 24 August 2026 to argue the regulator’s draft settings still leave households paying too much.
It is a slow, technical process with a very direct link to what you pay. Here is what is being decided.
What the rate of return instrument does
Every few years the Australian Energy Regulator sets a document called the Rate of Return Instrument. It determines the allowed return that regulated electricity and gas network businesses can earn on their invested capital, and it applies to networks whose regulatory periods begin in the four years after publication. That return is then baked into the revenue those networks may recover from customers.
In practice it is one of the highest impact numbers in Australian energy regulation. Energy Consumers Australia has estimated that network costs make up roughly 39 to 45 per cent of household electricity costs across the National Electricity Market, and that the rate of return drives on the order of 40 to 60 per cent of those network costs. Set it too high and households quietly overpay for a decade. Set it too low and networks may underinvest in a grid being rebuilt for renewables.
The AER published its draft 2026 instrument on 29 May 2026. On the AER’s own estimate, the changes proposed in that draft would save consumers around $1.1 billion over the coming years.
Why consumer groups say the draft is not enough
The argument turns on a parameter called equity beta, a measure of how much risk equity investors in a regulated network carry relative to the broader market. A higher beta justifies a higher allowed return, which flows through to higher network charges and then to your bill.
The AER’s draft moved the equity beta from 0.6 down to 0.55. Energy Consumers Australia has argued the analysis supports a figure closer to 0.4, on the basis that a regulated monopoly with guaranteed revenue is a genuinely low risk investment. On 24 August 2026 it joined the Australian Council of Social Service and small business and social sector groups in calling on the AER to go further, arguing a premium in the order of a billion dollars is still carried by energy users. Energy Consumers Australia chief executive Brendan French framed it as money that should be back in people’s pockets for other essentials, while ACOSS chief executive Cassandra Goldie argued the regulator’s job is to put people first rather than split the difference.
Networks push back. Their case is that returns must be high enough to attract the very large volumes of capital needed to connect new generation, reinforce transmission and handle two way flows from rooftop solar and batteries, and that setting the return too low raises the cost of the transition later.
The cheapest electricity is the kind you never have to buy, and the second cheapest is the kind delivered on a network that is not overpaying its investors.
What this means for your bill, and when
Three things are worth being clear about.
First, nothing changes on your next bill. The final instrument is expected in December 2026, and even then it does not reset prices directly. It feeds into individual network revenue determinations as each network’s regulatory period comes up, a staggered process running over years. This is about the direction of bills into the late 2020s.
Second, the effect is real but diluted. Even a meaningful cut to the allowed return only touches a portion of network costs, which are themselves 39 to 45 per cent of the bill. It is the same lag that has kept household bills from following the sharp fall in wholesale electricity prices during the June quarter.
Third, network charges are the part of the bill you cannot shop around. Retail competition lets you change retailer, plan and tariff type. It does not let you change the distribution business that owns the wires outside your house, and every retailer in that area passes through the same network charge. That is exactly why this decision matters.
What you can actually do in the meantime
If you want to move your own bill this year rather than wait for December, the levers are the familiar ones.
Check your plan against the market on Energy Made Easy, or Victorian Energy Compare in Victoria. Standing offers and legacy market offers are often well above the sharpest deals. Check too whether your tariff structure matches how you use power, because time of use and demand tariffs are spreading as daytime solar pushes midday prices down, and they help or hurt depending entirely on your consumption pattern.
Then reduce the volume you buy from the grid. With feed in tariffs falling in most states, rooftop solar economics have shifted decisively toward self consumption, which is also what has made home batteries more attractive. If you are weighing it up, run the payback numbers for your own roof, usage and state rebate rather than relying on a national average, and check the current concession and rebate settings in our rundown of energy bill relief in 2026.
Where to check the detail yourself
The primary source is the Australian Energy Regulator, which publishes the draft instrument, the explanatory statement dated 29 May 2026, the submissions from all parties and the review timetable on its website. Figures here are as reported in mid to late August 2026 and may change before the final decision.
This article is general information only and is not personal financial, tax or legal advice. Your network area, usage and retailer will differ, so consider advice tailored to your circumstances before acting.
The bottom line
A parameter almost nobody has heard of, the equity beta inside the AER’s rate of return instrument, will help set the largest component of Australian power bills for years. The draft trims it and the AER estimates around $1.1 billion in consumer savings. Consumer groups say the evidence supports going further. A final decision is due in December 2026. Watch it, but do not wait for it: the plan you are on and the power you generate yourself will move your bill much sooner than the regulator will.