Energy4 is currently helping business customers who are having back billing issues with suppliers.

Biggest issues have identified back billing was the result of;

Failed meters (Smart meter failures)

Supplier accountant issues (Suppliers currently sub-contracting out accounts to other countries to maximise profits, yet no accountability for ISO9001 and ICO failures)

Suppliers lying to business customers directly. The script appears to be to blame the Business customer.

Supplier call centre management telephoning business customers using mobile phones to offer vouchers

Call centre managers writing letters void of all reality that claim no contact was ever made (Client then responds with a list of all calls, and evidence of calls, call centre then claims they have no evidence of original letter)

Suppliers claiming cannot be returned (Calls to Banks with the use of a Credit Refund Return process allows customers to return illegally taken funds)

Suppliers not appearing in Court, blaming staffing issues, and then blaming business customers.

The biggest failure is still OfGem siding with Utility companies, and CPS not holding OfGem to account to bank Directors and managers

What to do if you are back billed

You do not have to pay any money sent on a new bill for energy used more than 12 months ago.

Citizens Advice suggests you write or email the supplier to explain and has a copy of an example letter, external people can use as a template.

In the first instance customers must complain to their supplier

After eight weeks, or if the supplier closes the complaint, whichever comes first, customers can then take their case to the independent Energy Ombudsman

Back billing is when your energy supplier charges you for energy you have already used but were not previously billed for, often due to supplier errors or inaccurate meter readings. UK regulations protect consumers from being charged for energy used over 12 months ago in most cases.

What is Back Billing?

Back billing, sometimes called a “catch-up” bill, occurs when your gas or electricity supplier discovers that you were undercharged or not charged at all for energy use over a past period. They then send you a bill covering this unpaid energy, which can come as a surprise or financial burden. Common reasons include estimated meter readings, cancelled direct debits, supplier billing errors, or incorrect meter numbers on bills.

Ofgem’s 12-Month Back Billing Rule

In the UK, Ofgem’s rules say suppliers cannot charge you for energy used more than 12 months ago if all these conditions apply:

You have never received an accurate bill for that energy before, even after asking for it.

You have not been informed of those charges via account statements.

Your direct debit was set too low and not corrected in time.

These rules apply to domestic customers and microbusinesses. If your supplier tries to charge for energy usage beyond 12 months in such cases, you have the right to refuse payment for that portion of the bill.

When the Rules Might Not Apply

The 12-month protection doesn’t apply if you acted unreasonably, such as:

Blocking access to your meter or refusing to provide meter readings.

Ignoring multiple payment requests from your supplier.

Using energy without paying (e.g., theft).

Also, if you were previously billed for the energy and failed to pay, it is considered debt and can be pursued beyond 12 months.

What to Do If You Receive a Back Bill

Check the bill carefully: Confirm the period covered and whether it exceeds 12 months.

Contact your supplier: If you believe the back bill is outside the 12-month limit, inform them of your rights under Ofgem’s rules and ask them to adjust the bill accordingly.

Request a payment plan: If the bill is valid but unaffordable, ask for repayment options that spread payments over the period the debt built up. This could mean, for example, paying off an 8-month back bill over 8 months.

Make a formal complaint: If the supplier insists on charging for more than 12 months or disputes your rights, escalate the issue to the Energy Ombudsman or seek advice from Citizens Advice.

How to Avoid Getting Back Billed

Provide regular meter readings. Submit manual readings frequently to avoid estimated bills.

Smart Meters Unreliable: The increase in back billing has resulted directly from failing Smart Meters. Therefore best advice is have the Meter readers attend the property to take photographic evidence.

Check your bills: Make sure details like meter numbers, consumption, and payment amounts are correct.

Stay in contact with your supplier: Inform them promptly if you move home or notice any billing issues.

Support if You Cannot Afford a Back Bill

Suppliers have a duty to help customers struggling with payments, offering support schemes and flexible payment plans. You can also seek assistance and advice from Citizens Advice or other consumer support organisations.

By understanding your rights and taking proactive steps, you can manage back bills effectively and avoid unexpected charges in the future.

https://www.ofgem.gov.uk/check-energy-back-billing-rules

https://news.resolver.co.uk/what-is-back-billing-and-can-you-refuse-to-pay/

https://www.forbes.com/uk/advisor/energy/energy-back-billing/

https://www.citizensadvice.org.uk/consumer/energy/energy-supply/problems-with-your-energy-bill/you-havent-received-a-gas-or-electricity-bill-in-a-while/

https://www.ofgem.gov.uk/check-energy-back-billing-rules

If you’ve received a back-bill (a catch-up bill for energy used but not previously charged), you have protections under Ofgem’s rules that limit how far back your supplier can charge, and clear steps to resolve or dispute such bills.

Understand Back Billing and Your Rights

A back-bill covers energy you used but weren’t correctly billed for, often due to estimated readings, supplier errors, or missed payments. In Great Britain, Ofgem rules state your energy supplier cannot charge you for energy used more than 12 months ago if:

You never received an accurate bill for that period, despite asking.

You were not previously informed of the charges through any statement.

Your Direct Debit was set too low and not corrected.

These rules protect domestic customers and microbusinesses. However, if you have acted unreasonably — for example, by blocking meter access, ignoring payment requests, or stealing energy — these protections may not apply. 

Ofgem

Steps to Take If You Receive a Back Bill

Check the Bill Period: Confirm if the bill is for energy usage older than 12 months. If so, check if the rules protect you from paying it.

Contact Your Supplier: Reach out promptly to ask why you’ve been back-billed and provide meter readings if you have them. Tell them if you believe the bill violates the 12-month rule. 

Dispute the Bill Formally: If the supplier insists on charges outside the protected period, submit a formal complaint, ideally in writing or via an established platform like Resolver, and keep records of all communication. 

Escalate to the Energy Ombudsman: If your complaint isn’t resolved within 8 weeks or you receive a deadlock letter, contact the Ombudsman, an independent body that can investigate and rule on disputes. 

Sources

Manage Payment if the Bill Is Valid

If the back-bill is for usage within the past 12 months or the rules don’t protect you, you are responsible for paying it. If you cannot afford the lump sum:

Ask your supplier for a repayment plan that spreads payments over the period the debt accrued. For example, if billed for 8 months, spread repayments over 8 months. 

If payments remain unaffordable, seek help from Citizens Advice or similar agencies for debt support and potential grants or discounts. 

Sources

How to Avoid Back Billing in Future

Get a smart meter: This sends accurate readings automatically, reducing estimated bills.

Submit regular meter readings: If no smart meter, send meter readings to your supplier regularly.

Check your bills: Review all bills to ensure they reflect your actual usage, and alert your supplier if there are discrepancies.

Keep suppliers updated: Inform about moves, meter faults, or changes affecting billing. 

Sources

Additional Support

If you feel overwhelmed or unsure, organizations like Citizens Advice provide free advice and template letters to dispute back-bills. You can also contact the Energy Ombudsman or Resolver for guidance on complaints. 

Ofgem

Summary: Don’t ignore a back-bill. Check if the 12-month protection applies. Contact your supplier for clarification or dispute the charge if it seems unfair. If the bill is valid but unaffordable, arrange a manageable payment plan. Take steps to ensure future bills are accurate and avoid surprises

Providing regular, accurate meter readings and reviewing your bills carefully are key to avoiding unexpected back-bills for energy you have used but not yet been billed for.

Why regular meter readings matter

Energy suppliers rely on meter readings to calculate your bills accurately. If you don’t provide readings regularly, suppliers often estimate your usage, which can lead to undercharging. When the real readings eventually come in, you may receive a back-bill to catch up on the difference. Submitting meter readings monthly or quarterly helps keep your bills in line with your actual consumption and reduces the risk of back-bills 

Benefits of smart meters

Smart meters automatically send your consumption data directly to your supplier, removing the need for you to submit readings manually. This leads to more accurate and timely bills, minimizing estimated readings and surprise catch-up bills 

If you already have a smart meter, make sure it is operating in “smart mode” and transmitting readings correctly 

Checking your bills

Always review your bills to ensure the meter readings match the ones on your meter and that the charges reflect your usage. If you spot any discrepancies or missing bills, contact your supplier promptly. Regular billing helps keep your account up to date and avoids unnoticed undercharges

Your rights regarding back-billing

Ofgem’s rules protect consumers from paying back-bills for energy used over 12 months before the bill was issued, provided your supplier is at fault and you have not acted unreasonably (e.g., preventing meter access). If you receive a back-bill, confirm it covers no more than the last 12 months and dispute it if it seems incorrect

What to do if you receive a back-bill

Ask your supplier to explain the reason for the back-bill and provide supporting evidence of usage.

If dissatisfied, raise a formal complaint with your supplier or use a dispute resolution service like Resolver.

If unresolved after eight weeks or a deadlock letter, escalate to the Energy Ombudsman

Sources

Additional tips

Keep your supplier informed about changes affecting your account, such as moving home or meter issues.

Regularly check your Direct Debit amount to ensure it matches your usage and avoid build-up of debt

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