Energy debtBack-billing overlapBalance checks

How long can an energy company chase debt?

Debt-chasing questions often mix two separate issues: whether a balance is genuinely owed, and whether back-billing protections affect older usage that should have been billed earlier. Separate those questions before you respond.

Reviewed: 26 March 2026Focus: UK household energy billingType: Information, not legal advice

The first question is not the age of the letter

It is the age of the usage being recovered and the reason it was not billed accurately earlier. If the supplier is chasing a balance that includes older usage, you need to know whether that usage should have been billed sooner and whether back-billing protections matter.

What to ask before agreeing anything

  • Which exact period does this debt cover?
  • How much is current usage and how much is historical correction?
  • Were any earlier bills estimated, delayed or missing?
  • How have you treated usage older than 12 months if it is relevant?
Do not agree a payment plan for a balance you do not yet understand.

Frequently asked questions

Is debt recovery the same as back-billing?

No. Debt recovery is about money the supplier says is owed. Back-billing protections are about certain delayed charges for older usage.

Should I ask for a payment plan immediately?

Ask what the balance covers first. You can still discuss affordability once you know what is genuinely being recovered.

What if the supplier cannot explain the timeline?

Keep the request in writing and move into the complaint route if the explanation stays vague.