Energy Bill Too High? How to Dispute an Electricity or Gas Bill and Get Your Money Back (Australia 2026)

Last updated 27 October 2026 · Reviewed by the Claim Done team · Not legal advice

Can you get your money back from an energy retailer?

Often, yes, and sometimes the better result is not having to pay at all. Energy bills are governed by detailed rules, not just general consumer law. In the five places that use the National Energy Customer Framework (NSW, Queensland, South Australia, Tasmania and the ACT), the National Energy Retail Rules set what a retailer may bill, how it must fix errors and when it must not disconnect you. Victoria has its own Energy Retail Code of Practice, set by the Essential Services Commission. Western Australia and the Northern Territory have separate state rules.

The Australian Consumer Law also applies: electricity and gas are “goods” under the ACL, and the services a retailer supplies must be provided with due care and skill. Misleading a customer about a plan, a discount or a fee is misleading conduct (s 18).

Depending on what went wrong, you can ask for:

• A corrected bill: a back bill cut down to the legal limit, an estimate replaced with an actual read, or the right tariff applied.
• A refund or credit of anything you were overcharged. Under the national rules no interest is added on either side.
• Time to pay a lawful back bill in instalments, without interest.
• Reconnection and compensation where you were disconnected when the rules did not allow it.

What a retailer cannot do:

• Back bill without limit when the error is its own. If the retailer undercharged you, or failed to send a bill, and it was not your fault, it can only recover 9 months of the undercharge in NERR states and 4 months in Victoria.
• Charge interest on a back bill (NERR states and Victoria).
• Disconnect you over a bill you are disputing in a NERR state while your complaint about it is unresolved with the retailer or the ombudsman.
• Disconnect a home registered for life support equipment (NERR states).
• Keep an overcharge. In NERR states it must tell you within 10 business days of finding an overcharge of $50 or more, and repay or credit it.

The most common problems with energy retailers

1. Bill shock: a sudden huge bill

A bill several times your usual amount usually comes from an estimated read being corrected, a meter fault, a tariff change or a back bill. Ask the retailer for the meter reads behind the bill and whether any of them were estimates. Claim a corrected bill if the reads or the tariff are wrong. Keep paying the part you do not dispute.

2. Back bill for months or years of usage

You moved in and never got a bill, or a meter was not read, and now a catch-up bill arrives. If the retailer caused it, the amount it can recover is limited to 9 months before it told you (NSW, QLD, SA, TAS, ACT) or 4 months (VIC). It must show the amount as a separate item, explain it, charge no interest and offer instalments. Claim the excess removed.

3. Wrong tariff or plan

You signed up to a plan or a time-of-use tariff and were billed on another, a promised discount was never applied, or you were moved to a dearer plan without being told. Claim the difference between what you were charged and what you should have been charged, refunded or credited.

4. Estimated bills that were way off

Repeated estimates followed by a large “true-up”. Ask for actual reads and a recalculation. If the retailer failed to read or bill properly and it was not because you blocked access to the meter, the back-billing limit can apply.

5. Overcharged and not refunded

Paid twice, charged after you moved out or switched, or a credit left on a closed account. Where the overcharge is $50 or more, the retailer must tell you within 10 business days of becoming aware and repay or credit it as you reasonably direct. A former customer’s refund should be made within 10 business days.

6. Disconnection or a disconnection threat

In NERR states, a retailer must not arrange disconnection while a complaint directly related to the reason for it is unresolved, while you keep to a hardship or payment plan, while a concession or rebate application you have told it about is undecided, or for non-energy charges. Claim reconnection and compensation for losses such as spoiled food if it disconnected you in breach.

7. Solar feed-in credits missing

Credits for exported solar energy not applied, applied at the wrong rate, or lost after a meter change. Claim the missing credits at the rate in your contract, backdated.

8. Account in your name that you did not open

A retailer transferred your account without proper consent, or you are billed for a property you left. Claim the account cancelled, charges reversed and any credit listing removed.

9. Debt collection or a credit listing over a disputed bill

A disputed amount sent to a collector or listed as a default. Energy complaint bodies take these complaints: ACAT, for example, lists debt collection and credit default listings among the energy complaints it deals with. Claim the collection stopped, the debt corrected and the listing removed.

10. Embedded networks

Some homes buy energy through an embedded network operator rather than a normal retailer. Ask your state’s ombudsman whether the operator is a member before you lodge. In the NT, embedded network billing complaints go to NT Consumer Affairs.

The energy billing rules: back-billing, overcharges and disconnection

Back-billing limits

In both NERR states and Victoria the limit does not apply if the undercharge was caused by your fault or an unlawful act or omission, for example blocking access to the meter or tampering. A failure by the retailer to send a bill counts as undercharging. No interest can be charged, and you can choose instalments over the period of the undercharge or 12 months, whichever is shorter.

Overcharges

Under rule 31 of the national rules, an overcharge at or above the $50 threshold must be disclosed within 10 business days of the retailer becoming aware, then repaid as you reasonably direct, or credited to your next bill. Smaller overcharges are credited. A former customer gets a refund, with the retailer using its best endeavours to pay within 10 business days. Victoria publishes the same $50 threshold.

When a retailer cannot disconnect you (NERR states)

Rule 116 lists the protected situations. They include: a home registered for life support equipment; an unresolved complaint, made to the retailer or the energy ombudsman, that is directly related to the reason for disconnection; a hardship or residential customer keeping to a payment plan; a pending rebate or concession application; non-payment of charges for anything other than energy; and disconnection for non-payment during an extreme weather event or a protected period. Some of these do not apply where the reason is refusing access to the meter. In the ACT, the utility is generally required not to disconnect while a hardship application to ACAT is decided.

The energy ombudsmen: free and able to bind the retailer

Every state and territory has an independent body for energy complaints. The ombudsmen describe their service as free (in the ACT the role sits with ACAT), they expect you to give the retailer a chance to fix the problem first, and most can make a decision that binds the retailer if you accept it. If you do not accept it, you remain free to go to a court or tribunal. Details for each state are in the table further down.

What you can claim from an energy retailer

• The back bill reduced to the 9-month (NERR) or 4-month (VIC) limit, where the undercharge was the retailer’s fault.
• Refund or credit of overcharges, including double payments and charges after you moved or switched.
• The difference between the tariff or plan you agreed to and the one you were billed on.
• Missing solar credits at your contracted rate.
• Losses from a wrongful disconnection, such as spoiled food or the cost of reconnection.
• Late fees and interest reversed where they flow from the retailer’s error.

To work out the amount, get your full billing history and meter reads, mark which reads were estimated, and recalculate using your contracted rates. For a back bill, find the date the retailer first told you about the undercharge and count back 9 months (4 in Victoria): usage before that date is what the retailer cannot recover.

Worked example (round numbers, for illustration only): you live in Queensland. Your retailer did not bill you for 15 months because of its system error, then sent a $2,250 catch-up bill (about $150 a month). It can only recover the 9 months before it told you: 9 x $150 = $1,350. Your claim: the bill reduced by $900, no interest, and the $1,350 paid by instalments over a period you choose of up to 12 months (the cap, because the undercharging ran for more than 12 months).

Evidence to gather

1. Every bill for the disputed period, plus the last few normal bills for comparison.
2. The meter reads on each bill, marked actual or estimated, and photos of your meter display with the date.
3. Your energy plan or contract, the offer you accepted and any welcome pack or price change letters.
4. The date the retailer first told you about any back bill (the letter or bill where it appeared).
5. Complaint reference numbers, with dates and the name of each person you spoke to.
6. Disconnection warning notices and any letters about payment plans or hardship.
7. Proof of a rebate or concession application, if you have one pending.
8. Solar system details: the feed-in rate in your contract and export figures from your inverter app.
9. Receipts for losses from a disconnection, such as food replaced.

How to get your money back: 5 steps

Step 1. Complain to the retailer

Call or email your retailer and say you are making a complaint about the bill. Name the bill, the amount you dispute and what you want: a corrected bill, a refund, the back bill limited, or instalments. Ask for a reference number and, by phone, follow up in writing the same day. Keep paying the amount you do not dispute. If a disconnection notice has arrived, say clearly that your complaint is about the same bill.

Step 2. No answer or a refusal: send a formal bill dispute letter

If the retailer does not fix it, put it in writing in a way it must deal with. Our energy bill dispute letter sets out the billing rule that applies in your state, the corrected amount and a clear deadline. It is your formal complaint under the retailer’s own complaints procedure, and the record the ombudsman will ask for.

Dispute your energy bill – $49

More about it: energy bill dispute letter. For a dispute with another kind of business, our general letter of demand may fit better.

Step 3. Take it to your state’s energy ombudsman

The ombudsman is free, independent and, in most states, able to make a decision the retailer must follow if you accept it. Some send your complaint back to a senior team at the retailer first (in Queensland and the ACT that team should contact you within 5 business days), so the formal letter from Step 2 saves time. Attach it, the retailer’s reply and your bills. While an energy ombudsman is handling a complaint about the bill, a retailer in a NERR state must not disconnect you for that bill.

Step 4. Still unpaid: send the final demand

Use this when the retailer agreed to a refund or credit and has not paid it, when you left the retailer and it still holds your money, or before you go to a tribunal. Quote your first letter, the retailer’s response and your ombudsman reference number.

Send the final demand – $49

Step 5. A tribunal or court claim, only if the ombudsman route fails

For energy bills the ombudsman is the better route: it is free, it knows the billing rules, and its decision binds the retailer if you accept it. A consumer claim at the tribunal or court in the retailer’s state is the fallback, for example if you reject an ombudsman decision or the ombudsman cannot take the complaint.

Prepare your tribunal application – $97

In WA, SA and Tasmania this is a Magistrates Court claim, and the same service prepares your court claim. To organise bills, meter reads and letters for a hearing, use the Hearing Bundle ($97).

Where your claim goes in each state

The energy ombudsman (or its equivalent) where the supply address is:

Time limits we could confirm: the WA ombudsman generally cannot look into issues you knew about for more than 12 months, and the Ombudsman NT normally will not accept matters more than 12 months old, unless there are special reasons. Complain early everywhere.

If you go on to a tribunal or court, file in the state or territory where the business is. For the NSW and Victorian tribunals (NCAT and VCAT) there is one exception: if the business is an individual or sole trader living in another state, the tribunal cannot decide the claim and it must go to a court instead (Burns v Corbett [2018] HCA 15). QCAT in Queensland is a court of a State (Owen v Menzies [2012] QCA 170) and is not affected. Energy retailers are almost always companies, so this rarely applies.

After you win: getting paid

If you accept an ombudsman’s binding decision, the retailer must carry it out. If you went to a tribunal or court and the retailer still does not pay by the date in the order, the order can be enforced. In most states it is registered or filed with the court and enforced like a judgment: a garnishee order on the business’s bank account or money owed to it, seizure and sale of property, or an examination where the business must answer questions about its finances.

Tribunals do not collect the money for you. In NSW, Victoria, Queensland, the ACT and the NT, an unpaid tribunal money order is first registered, recorded or filed with a court. In WA, SA and Tasmania the Magistrates Court decides the claim, so you already have a court judgment. Then you apply for the court’s enforcement tools.

Enforce your order – $97

Enforce your order – $97

Questions people ask

How far back can an electricity company back bill me?

Nine months, if the undercharge was the retailer’s fault and you live in NSW, Queensland, South Australia, Tasmania or the ACT. In Victoria the limit is four months. The limit counts back from the date the retailer tells you about the undercharge. It does not apply if you caused the undercharge, for example by blocking meter access.

Do I have to pay a back bill for electricity I used?

You usually pay the part the retailer is allowed to recover, but not more. In NERR states that is 9 months of undercharging, in Victoria 4 months, where the error was the retailer’s. It cannot charge interest, must explain the amount as a separate item, and must offer instalments over the undercharge period or 12 months, whichever is shorter.

Can my power be disconnected while I dispute the bill?

Not in NSW, Queensland, SA, Tasmania or the ACT while a complaint directly related to the reason for disconnection is unresolved, whether it is with the retailer or the energy ombudsman. Make the complaint before the disconnection date and say it is about the same bill. Homes registered for life support equipment cannot be disconnected.

Is the energy ombudsman free?

Yes. EWON, EWOV, EWOQ, EWOSA, the WA and Tasmanian ombudsmen and the Ombudsman NT all describe their service as free. In the ACT the energy and water complaints role sits with ACAT. All of them expect you to give the retailer a chance to fix the problem first.

Can the energy ombudsman make my retailer pay?

In most states, yes, if you accept its decision. EWON, EWOV and EWOSA say a decision binds the retailer once you accept it, the WA ombudsman says the provider must follow a decision you agree to, and Queensland’s can make a final order. If you reject a decision you can still go to a court or tribunal.

My retailer overcharged me. How long does it have to refund me?

In NERR states, once the retailer becomes aware of an overcharge of $50 or more it must tell you within 10 business days, then repay it as you reasonably direct or credit your next bill. If you have left that retailer, it must use its best endeavours to refund you within 10 business days. No interest is added.

What should I do if my energy bill is suddenly much higher than usual?

Check whether the meter reads were estimated, whether your tariff changed, and whether the bill covers a longer period. Ask the retailer for the reads and a recalculation, and keep paying the part you do not dispute. If it will not correct the bill, send a formal dispute: our energy bill dispute letter sets out the rules for your state.

I was put on the wrong energy plan. Can I get the difference back?

Yes, if you can show what you agreed to. Gather the offer or contract, then calculate what each bill should have been on the agreed rates. Ask for the difference as a refund or credit. If the retailer misled you about the plan or a discount, that can also be misleading conduct under the Australian Consumer Law.

Who do I complain to about electricity in the ACT or the Northern Territory?

In the ACT, ACAT handles energy and water complaints as the territory’s ombudsman: (02) 6207 1740. In the NT, complaints about Jacana Energy or Power and Water go to the Ombudsman NT after their own complaint process, and complaints about Rimfire Energy, gas suppliers and embedded networks go to NT Consumer Affairs.

Can a retailer send my disputed bill to a debt collector?

It can try, but you can complain about it. Energy complaint bodies take complaints about debt collection and default listings; ACAT lists both. Tell the retailer and any collector in writing that the debt is disputed and that the complaint is with the ombudsman. The energy bill dispute letter ($49) puts your dispute on the record.

Do I need a lawyer for an energy bill dispute?

Almost never. Energy bill disputes are what the ombudsmen are set up for, and they are free. What helps most is a clear written complaint with your bills, meter reads and the exact amount you dispute. For a large business account or a claim for property damage, consider legal advice.

How long do I have to complain about an energy bill?

Complain as soon as you notice. The WA ombudsman generally will not look at issues you knew about for more than 12 months, and the Ombudsman NT normally will not accept matters older than 12 months, unless there are special reasons. Older bills are also harder to check because meter data may no longer be available.

Sources

• National Energy Retail Rules, version 47 (AEMC), rules 30, 31, 50, 116
• Australian Energy Regulator: Retail (jurisdictions that have adopted the National Energy Customer Framework)
• Essential Services Commission: Energy Retail Code of Practice (version 7, 1 October 2026), clauses 70-71
• Competition and Consumer Act 2010, Schedule 2 (Australian Consumer Law), ss 2 (“goods”), 18, 60, 64
• EWON: Binding decisions; EWOV: Our binding decisions; EWOQ: Complaints process; EWOSA: Our process
• Energy and Water Ombudsman WA: FAQs; Energy Ombudsman Tasmania: About us
• ACAT: Energy and water cases
• NT Utilities Commission: Complaints, useful links; Ombudsman NT: Complaints
• Tribunal and court pages listed in the table above

More guides for other businesses: how to get your money back.

Checked 19 October 2026 by the Claim Done legal content team.

Claim Done is not a law firm and does not give legal advice. This page is general information. For a complex or high-value matter, speak to a lawyer or a free community legal centre.