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Energy Bills Guide
Can I Dispute My Energy Bill in Northern Ireland?
The 13-month back-billing limit, estimated bills, complaining to your supplier, the Consumer Council and the Utility Regulator.
Last reviewed: 25 September 2026Sources: listed at the end, each checked on the date shownNorthern Ireland
Who this guide is for
Households in Northern Ireland with a problem with an electricity or gas bill: a catch-up bill (back bill), bills based on estimates, or a bill you think is wrong. It covers the Northern Ireland back-billing limit and how to complain. The Consumer Council also helps with complaints about heating oil suppliers.
Payment plans if you cannot afford a bill, prepayment (keypad) meters, being cut off, Direct Debit amounts and refunds of credit: this guide does not cover the Northern Ireland rules. Ask the Consumer Council or Advice NI.
Grants and payments to help with energy costs: ask Advice NI.
Which months of a back bill can be charged in your case: this site does not work that out for Northern Ireland. Ask the Consumer Council.
Energy in Northern Ireland is regulated by the Utility Regulator. Ofgem is the regulator for Great Britain, so its rules are not the Northern Ireland rules.
Since 1 October 2020, where the supplier is at fault (for example it used estimated readings instead of getting the meter read), it can back-bill a home or microbusiness customer for no more than 13 months of energy, whatever the payment type.
The limit does not apply where the supplier could not bill because of unlawful activity such as meter tampering, or where it could not get an actual meter reading despite using all reasonable efforts.
Complain to your supplier first. If it does not sort it out, or you get no reply, go to the Consumer Council for Northern Ireland. It is free.
If the Consumer Council cannot resolve it, it may be able to refer it to the Utility Regulator for a decision.
What the rules depend on
Where do you live? Northern Ireland: this guide. England, Wales or Scotland: the Great Britain guide, with different rules.
Was the supplier at fault? For example it used estimated readings instead of getting the meter read: the 13-month limit applies. Unlawful activity such as meter tampering, or no actual reading despite all reasonable efforts: the limit does not apply.
Is the energy on the bill older than 13 months? The limit only stops a supplier at fault charging for more than 13 months of energy. This site does not work out which months can be charged in Northern Ireland: ask the Consumer Council.
Have you complained to your supplier? Not yet: do that first. Yes, and you are unhappy with the answer or had no reply: go to the Consumer Council.
"I've had a catch-up bill"
Check how far back the bill goes and why you were not billed correctly. If the supplier is at fault, it can back-bill for no more than 13 months of energy (since 1 October 2020).
The limit applies to electricity and gas, for homes and microbusinesses.
Contact your supplier and say why you think the bill breaks the limit. If it does not agree, go to the Consumer Council.
"My bills were estimated"
Back bills are often caused when a meter is not read and an estimate is used.
The Consumer Council encourages you to submit your own meter readings, allow access for meter readings, and check your bills. If something does not look right, contact your supplier.
"I've complained and it's not sorted"
The Consumer Council can help with unresolved complaints about electricity, gas and heating oil suppliers, including billing issues, meter issues, faults not repaired correctly, customer service and switching problems. Its service is free.
Before you go to the Consumer Council you should have made a formal complaint to your supplier, worked with it to resolve the complaint, waited for its reply within its standard response time, and gathered evidence such as letters or emails.
If you need extra help, the Consumer Council can help with your complaint from the beginning.
You can complain to the Consumer Council online, by phone or by email.
"Can the Utility Regulator decide it?"
Only after the Consumer Council. If the Consumer Council cannot deal with your complaint or resolve it, it may be able to refer it to the Utility Regulator, if it is something the Regulator has the legal authority to decide.
The Utility Regulator then considers evidence from both sides and makes a determination. Some determinations take four months or more.
Deadlines
Back bills: where the supplier is at fault, no more than 13 months of energy (since 1 October 2020). This site does not work out the Northern Ireland date.
Before the Consumer Council: wait for your supplier's reply within its standard response time.
A Utility Regulator determination can take four months or more.
Any other time limit, including for going to court: this guide does not cover it. Ask the Consumer Council or Advice NI.
Where to go for help
Consumer Council for Northern Ireland (energy complaints, free): 0800 121 6022, consumercouncil.org.uk
Utility Regulator: 028 9031 1575 (complaints reach it through the Consumer Council)
Advice NI: 0800 915 4604
Traps
Ofgem's 12-month back-billing rule is for Great Britain. The Northern Ireland limit is 13 months, and it applies where the supplier is at fault.
News about Ofgem and its price cap is about Great Britain, not Northern Ireland.
The Utility Regulator does not take your complaint first: go to your supplier, then the Consumer Council.
The 13-month limit does not protect you if the supplier could not bill because of meter tampering or other unlawful activity.
Sources (checked 25 September 2026)
Utility Regulator (uregni.gov.uk): Utility Regulator's back billing decision welcomed by the Consumer Council (from 1 October 2020, 13 months where there has been a supplier fault, often a meter not read and an estimate used; domestic and microbusiness; the Consumer Council's advice on meter readings and checking bills). Checked 25 Sep 2026.
Utility Regulator news 11 Mar 2020 and 29 Sep 2020 (Article 14(2) of the Electricity (NI) Order 1992 and the Gas (NI) Order 1996; whatever the payment type; not where the supplier could not bill because of unlawful activity such as meter tampering, or could not get an actual reading despite using all reasonable efforts); checked 19 Sep 2026.
Utility Regulator: Making a complaint about my energy supplier (supplier first, then the Consumer Council, which may be able to refer it to the Utility Regulator where it has the legal authority to make a determination; determinations can take four months or more; 028 9031 1575) and Making a complaint about my energy or water supplier (quasi-judicial process, evidence and submissions from both parties). Checked 25 Sep 2026.
Consumer Council (consumercouncil.org.uk): Complaints about electricity, oil and gas (unresolved complaints; free; types of complaint; before submitting: formal complaint, work with the supplier, wait for its standard response time, gather evidence; online, phone or email; extra assistance from the beginning). Consumer Council 0800 121 6022 (Utility Regulator consumer guide and switching leaflet). Checked 25 Sep 2026.
Ofgem press release (Ofgem is the independent energy regulator for Great Britain). Checked 25 Sep 2026.
Advice NI 0800 915 4604, as in our small claims guides (checked 24 September 2026).
Important disclaimer: This guide covers electricity and gas bill disputes in Northern Ireland as at 25 September 2026. General legal information only, not legal advice. ukworkrights.co.uk, Not a law firm.