How to get a refund from British Gas for overcharging

Finding an unexpected overcharge on your energy bill can be frustrating, especially when every penny counts. British Gas, like all energy suppliers, has a clear obligation to bill you accurately and refund any overpayments. You have the right to challenge incorrect charges and get your money back.

Reviewed by Corey Musa, Founder·Last reviewed June 2026·LinkedIn

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Your rights

Under their Supply Licence Conditions, regulated by Ofgem, British Gas must bill customers accurately and handle complaints fairly and promptly. If you have been overcharged, they are legally obliged to correct the error and refund the excess amount. If your complaint is not resolved to your satisfaction, you have the right to escalate your case to the Energy Ombudsman, an independent body that can make binding decisions.

Step by step

  1. 1Gather your evidence. Collect all relevant bills, meter readings, and any correspondence with British Gas. Highlight the specific charges you believe are incorrect.
  2. 2Contact British Gas directly. Call their customer service or use their online chat to explain the overcharge. Clearly state why you believe the bill is wrong and provide your evidence.
  3. 3Make a formal complaint if unresolved. If the initial contact doesn't resolve the issue, ask for your case to be escalated to a formal complaint. Request a complaint reference number and a timeframe for resolution.
  4. 4Escalate to the Energy Ombudsman. If British Gas has not resolved your complaint within eight weeks, or if you receive a 'deadlock letter' stating they can't resolve it, you can take your case to the Energy Ombudsman for an independent review.

What they'll say, and your comeback

Our system shows these charges are correct.

Comeback, I have provided evidence that contradicts your system's data. Please review my meter readings and payment history carefully. I expect a detailed explanation for each disputed charge.

It was an estimated bill, we'll adjust it next time.

Comeback, I provided an actual meter reading. You are obliged to bill me based on actual consumption, not estimates. I require an immediate correction and refund for the overpayment.

We're experiencing delays in processing refunds.

Comeback, I understand there can be delays, but I expect a clear timeframe for when my refund will be processed. If this delay causes me financial detriment, I will seek appropriate compensation.

FAQ

How long does British Gas have to refund me?

Once an overpayment is confirmed, British Gas should process your refund promptly. While there isn't a strict legal deadline for every scenario, industry best practice and Ofgem's expectations suggest this should happen within a few weeks. If there's a significant delay, you should chase them and consider escalating your complaint.

Can I get compensation for the hassle of being overcharged?

Yes, if British Gas's error or delay in resolving the overcharge has caused you significant inconvenience, stress, or financial detriment, you can request compensation. The Energy Ombudsman can award compensation for distress and inconvenience if they find British Gas has handled your case poorly.

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A self-serve tool, not a law firm. General information, not legal advice.