Check a billOfgem back billing rules explained without the supplier jargon
Use this page when the supplier mentions back billing rules, old charges or a catch-up balance and you need to know what to ask for next.
Best next steps
What to ask the supplier to identify
The period
Which dates are included in the old charge?
The readings
Were they actual, estimated, smart or customer readings?
The reason
Why was the amount not billed correctly earlier?
The rule position
Does the supplier say the back billing rules do or do not apply?
Supplier wording
Please explain how the back billing rules have been applied to this bill. Identify any charges relating to energy used more than 12 months before the bill date and explain whether those charges should be removed or corrected.
Back billing cluster
Frequently asked questions
Is this page official Ofgem advice?
No. It is a plain English support page that helps you understand what to ask the supplier and where to check official sources.
What is the main mistake people make?
They argue about the total amount without identifying the period, readings and older charges.