Power Bill Doesn’t Add Up? How to Dispute an Energy Company Overcharge in Australia

The bill came in at $1,400 when you normally pay $400. It says “estimated read”. Or the retailer’s just discovered they “under-billed” you two years ago and wants it all now. Or the 25% discount you signed up for has quietly vanished. You called. You waited 50 minutes. Someone in a call centre told you it’s correct and asked if you’d like to set up a payment plan.

Energy retailers are among the most regulated businesses in the country, and they have very specific obligations about billing. When they get it wrong, there’s an ombudsman with the power to make them fix it, for free.

Your rights

• National Energy Retail Rules (NERR). These apply in New South Wales, Queensland, South Australia, the Australian Capital Territory and Tasmania (Victoria has its own Energy Retail Code of Practice; Western Australia has the Code of Conduct for the Supply of Electricity to Small Use Customers). Key rules:
  • Bills must be based on actual meter reads at least once every 12 months, and you can request a bill be re-issued on an actual read or your own self-read if an estimate is wrong.
  • Back-billing is limited. A retailer generally cannot bill you for usage more than 9 months old (NERR rule 30; reduced from 4 years in 2019) if the delay was their fault. Victoria has a similar 4-month/9-month limit.
  • Billing disputes. While a bill is disputed, the retailer must not disconnect you for the disputed amount, and must review the bill and explain the basis.
  • Hardship and payment plans. Retailers must offer payment plans and hardship programs and can’t disconnect while you’re on one and paying.
• Australian Consumer Law. Misleading discount claims, “guaranteed” savings, or contract terms you weren’t told about breach ss 18 and 29 ACL. The ACCC has fined major retailers for exactly this.
• Meter testing. You can request a meter test. If the meter is faulty, you pay nothing; if accurate, there’s a modest fee (and in some states, none).

What to do right now

1. Get 12–24 months of bills. Download them from the portal. Note the read type (actual vs. estimated) on each, the tariff, the daily supply charge, and any discounts.
2. Take your own meter read and photograph it. Date-stamped. If the bill was estimated, send this to the retailer and request a re-bill on the actual read.
3. Check the tariff and discount against your contract. Compare your welcome pack / energy price fact sheet with what’s on the bill. If a discount was removed or the tariff changed without the required notice, that’s a breach.
4. Lodge a formal billing dispute with the retailer in writing. Use the word “dispute”. State what you dispute and why. Ask for a written explanation of the bill’s calculation. They must respond, and they cannot disconnect you over the disputed amount.
5. Go to the energy ombudsman. If the retailer doesn’t fix it within a reasonable time (or you’re just not getting anywhere), lodge with your state energy ombudsman. It’s free, the retailer must participate, and the ombudsman’s decision binds the retailer up to significant amounts.
6. Send a Letter of Demand for refunds and compensation. Where you’ve been overcharged and already paid, or the retailer’s conduct caused you loss (a wrongful disconnection, a default listing over a disputed bill), a formal letter demanding refund, interest, and removal of any credit listing gives you leverage in parallel with the ombudsman process.

The bills that get overturned most often

• Catch-up bills after a run of estimates. The retailer estimated low for a year, then an actual read produced a huge “catch-up”. You’re entitled to have the catch-up spread over the same period it accrued, and any usage older than the back-billing limit written off if the estimates were the retailer’s or distributor’s fault (e.g. meter access was available and they didn’t read it).
• Smart meter data disputes. If a smart meter has been installed and the bill spiked, request the interval data (your retailer must provide it free). Compare it with your actual usage patterns. Faulty meters and crossed meters (you’re being billed for the neighbour’s unit) are more common than retailers admit.
• Solar feed-in not credited. Check that your export is showing on the bill at the agreed rate. Missing feed-in credits after a meter change is a frequent error.
• Concession not applied. Energy rebates and concessions are worth hundreds a year. If you’re eligible and it’s not on the bill, ask for it to be applied and backdated.
• Bills after you moved out. If you gave notice of the move and provided a final read date, anything after that is not your usage.
• Disconnection over a disputed amount. This is a serious breach. Wrongful disconnection payments in Victoria are mandated by law; elsewhere, the ombudsman will award compensation.

What the ombudsman can do: require the retailer to re-bill on actual data, write off amounts that breach back-billing rules, reverse fees, refund overpayments with interest, remove default listings, and award compensation for wrongful disconnection or poor complaint handling. Retailers are charged for every ombudsman case, so many settle as soon as the ombudsman contacts them.

Don’t stop paying entirely. Keep paying the undisputed portion (your normal usage) while the dispute runs. It protects you from disconnection and shows good faith.

Who to complain to

Energy & Water Ombudsman NSW (EWON), Energy and Water Ombudsman Victoria (EWOV), Energy and Water Ombudsman Queensland (EWOQ), Energy and Water Ombudsman SA (EWOSA), Energy and Water Ombudsman Western Australia, Energy Ombudsman Tasmania, ACAT (Australian Capital Territory), Northern Territory Ombudsman. The Australian Energy Regulator (AER) enforces the NERR and takes reports of systemic breaches; the Essential Services Commission does the same in Victoria. The ACCC for misleading pricing claims.

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