Eon Next Complaints

E.ON Next complaints follow a set process: you raise the issue with E.ON Next first, and if it is not resolved within eight weeks or you receive a deadlock letter, you can escalate to the Energy Ombudsman for free. Most complaints are about billing, which made up 58% of all energy cases the Energy Ombudsman accepted in the first half of 2026.

If you are a bill-conscious household worried about a wrong bill, a smart meter that is not sending readings, or slow replies, knowing the correct order of steps saves weeks. This walkthrough sets out how to complain, what to say, how long each stage takes, and how to switch away if you decide to leave. Free Price Compare sources this from Ofgem, Citizens Advice and Energy Ombudsman publications.

Last updated: August 2026

Written by the Free Price Compare editorial team | Reviewed August 2026

How do I complain to E.ON Next?

Complaining to E.ON Next starts by contacting the supplier directly, in writing where possible, so you have a dated record. E.ON Next’s dedicated complaints email is [email protected], and it also takes complaints by phone and by post to E.ON Next, Trinity House, 2 Burton Street, Nottingham, NG1 4BX. Set out the problem clearly: your account number, what went wrong, dates, meter readings if relevant, and the specific outcome you want, whether that is a corrected bill, a refund, or an apology and goodwill payment. Keep replies to the same thread so the history stays together. Under rules overseen by Ofgem, every energy supplier must have a published complaints handling procedure, and E.ON Next’s is available on its website or by asking for a copy.

What is the best way to contact E.ON Next?

The best way to contact E.ON Next about a complaint is by email to [email protected], because it creates a written, time-stamped record you can later hand to the Energy Ombudsman. Phone lines are useful for a quick account query but leave no automatic paper trail, so follow any call with an email summarising what was agreed. If you use the phone, note the date, time and the adviser’s name. Written contact matters most for billing disputes and back-billing arguments, where the sequence of dates decides who is right.

What should I include in the complaint?

• Your account number and the address the energy is supplied to.
• A short, factual description of the problem and when it started.
• Any meter readings, bill dates or reference numbers that support your case.
• The specific resolution you want, such as a rebill, refund or compensation.
• A note that you expect a response within the supplier’s published timescales.

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How do I escalate a complaint inside E.ON Next?

Escalating inside E.ON Next means asking for a second opinion when the first response does not resolve things. E.ON Next invites customers who feel a complaint has not been handled properly to email [email protected], where a manager or senior adviser reviews the case again to try to reach a fair outcome. This internal escalation happens before the Energy Ombudsman and does not use up your right to go external. When you write to that address, reference your existing complaint, summarise the earlier responses, and state plainly why you think the outcome so far is wrong. A calm, evidence-led message tends to get a faster review than a general expression of frustration, and it strengthens your position if the case later reaches the Energy Ombudsman.

How long does E.ON Next take to resolve a complaint?

E.ON Next, like all UK energy suppliers, has up to eight weeks to resolve a complaint before you can escalate to the Energy Ombudsman. Many straightforward issues are settled far sooner, sometimes within days, but complex billing disputes and back-billing cases often take longer. If a complaint is marked as resolved but you do not agree it has been fixed, reply and say so clearly, because a case closed without your agreement is not truly resolved. The eight-week clock runs from when you first raised the complaint, so record that date. The government’s Department for Energy Security and Net Zero announced in 2026 that it intends to cut this escalation window from eight weeks to six, though households should check whether that change is in force before relying on it.

What if E.ON Next doesn’t resolve my complaint?

If E.ON Next does not resolve your complaint within eight weeks, or sends you a final response or deadlock letter, you can take the dispute to the Energy Ombudsman for free. The Energy Ombudsman is an independent, government-approved scheme that settles disputes between households and energy suppliers, and its decision is binding on the supplier but not on you. There is no fee at any stage and you do not need a solicitor. You can raise a case online, by post to PO Box 966, Warrington, WA4 9DF, by email to [email protected], or by phone on 0330 440 1624. A deadlock letter lets you escalate before the eight weeks are up, so if E.ON Next says it can do nothing more, ask for that letter in writing.

What can the Energy Ombudsman do?

The Energy Ombudsman can order E.ON Next to take practical action, apologise, or pay a financial award, and the supplier must act within 28 days if you accept the decision. Practical remedies include correcting or cancelling a bill, crediting your account, or changing your tariff. What the Energy Ombudsman cannot do is fine suppliers, punish them, or dictate how they run their business, so its role is to put your individual case right rather than to regulate the company. Bring your dispute within 12 months of receiving a deadlock letter, because cases raised later can be rejected. The Ombudsman also will not step in while court action over the debt is ongoing.

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Are E.ON a good energy supplier for customer service?

E.ON Next scored 3.71 out of 5 on the Citizens Advice Star Rating for the fourth quarter of 2025, placing it third overall among rated suppliers, according to Citizens Advice. The Star Rating measures customer service across billing accuracy, smart meter operation, contact wait times and complaints handling, with complaints weighted heavily. In that period E.ON Next answered around 90.7% of emails within two days and had an average call wait of roughly 123 seconds. Ratings move each quarter, so check the live Citizens Advice supplier page for the most recent figure before drawing conclusions. A high overall score does not mean every customer has a smooth experience, and individual billing disputes can still take weeks to settle, but on the published measures E.ON Next has performed above the sector average.

Why has my E.ON Next bill suddenly jumped?

A sudden jump in an E.ON Next bill is most often caused by estimated readings being corrected, a direct debit review, a tariff change, or higher seasonal usage rather than an error. Estimated bills catch up with reality when an actual meter reading is submitted, which can produce a large one-off adjustment. If your bill has doubled and you cannot see why, submit a fresh meter reading, check whether you moved from a fixed deal onto the standard variable tariff, and compare your usage in kWh against the same period last year. Billing complaints are the single biggest category the Energy Ombudsman handles, at 58% of cases in the first half of 2026. If you think a bill is wrong, our guide on why your bill may be higher than a neighbour’s explains the common causes.

Can E.ON Next back-bill me for old energy?

E.ON Next cannot charge you for energy used more than 12 months ago if it failed to bill you correctly and the fault was not yours. This back-billing rule, enforced by Ofgem, protects households from surprise catch-up bills going back years. It applies where the supplier had the information needed to bill you accurately but did not. The rule does not wipe out genuine current debt, and it does not apply if you blocked meter access or gave wrong readings. If E.ON Next tries to bill you for energy used beyond 12 months, raise a complaint citing the back-billing rule, and escalate to the Energy Ombudsman if it is not corrected.

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Can I switch energy suppliers if I’m unhappy with E.ON Next?

You can switch away from E.ON Next at any time, and an ongoing complaint does not block a switch. The right to switch is protected by Ofgem’s rules, and a switch normally completes within five working days once you have chosen a new deal. Switching does not cancel an outstanding complaint or debt, so keep pursuing the complaint or the Energy Ombudsman case even after you leave. If you owe money, you can usually still switch as long as the debt is less than 28 days old, or you can clear it first. A fixed tariff protects your unit rate and standing charge for the contract term, unlike the standard variable tariff that tracks the price cap. Before you move, our overview of what to check beyond price on an energy tariff is worth a read.

Does E.ON Next charge exit fees?

Whether E.ON Next charges an exit fee depends entirely on your tariff: fixed deals often carry an early exit fee per fuel, while the standard variable tariff never does. Under Ofgem rules, you can leave any tariff exit-fee free within the final 49 days of your fixed term, and no supplier can charge an exit fee on a standard variable default tariff. Check your latest bill or annual statement, which must state any exit fee that applies. If you are on the standard variable tariff, likely if you did nothing when a fixed deal ended, you can switch with no penalty. For a comparison of how another major supplier handles this, our British Gas exit fees and switching guide shows the same rules in action.

How does the price cap affect what E.ON Next charges?

The Ofgem energy price cap sets the maximum unit rates and standing charge E.ON Next can charge on its standard variable tariff, not a fixed total bill. For 1 July to 30 September 2026, Ofgem set the cap at around £1,663 a year for a typical dual-fuel household paying by direct debit, based on updated typical-use values of 2,500 kWh electricity and 9,500 kWh gas. On that cap, standard variable direct debit customers pay an average of 26.11p per kWh for electricity plus a daily standing charge of 57.19p. Your actual bill rises or falls with how much you use. Ofgem reviews the cap every three months, with the October 2026 level due to be confirmed in late August 2026. Because a fixed deal can undercut the capped standard variable tariff, comparing before you renew is where most savings come from.

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What if I need extra support during a complaint?

Households in vulnerable circumstances can join E.ON Next’s Priority Services Register, a free scheme every supplier must offer under Ofgem rules, for extra help during a complaint or supply issue. The register covers people of pensionable age, those with disabilities or long-term health conditions, families with young children, and anyone temporarily in need. Benefits include priority support in a power cut, help reading meters, and advance notice of planned interruptions. If a complaint involves a health-critical supply, tell E.ON Next you are on the register so your case is prioritised. Citizens Advice also runs a free consumer helpline and can log your complaint with its records, which feed into the Energy Ombudsman’s complaints data.

• British Gas Exit Fees & Switching Guide: Avoid Extra Charges
• British Gas Complaints And Customer Service
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• What Uses the Most Energy in the Home? | FreePriceCompare

Information correct as of 24 August 2026. Prices, tariffs, policy details and providers change frequently, so please check the latest details before making a decision. This article is for general information only and does not constitute financial advice. Free Price Compare is authorised and regulated by the Financial Conduct Authority (FCA).