Wrong Meter Reading on Your Energy Bill?
A wrong reading is one of the cleanest bill problems to challenge because the correction can be tied to objective evidence: the meter photo, serial number, bill date and reading history.
Use together
The short answer
If your bill uses a wrong reading, do not just say the bill is too high. Send the reading on the bill, your correct reading, the date taken, a meter photo and the serial number if visible. Ask for a corrected rebill and balance update.
Evidence that usually matters
Meter photo
Take a clear photo showing the reading and serial number if possible.
Bill PDF
Keep the full bill, not just the balance screenshot.
Reading type
Check whether the bill says estimated, customer, smart or actual.
Reading history
Ask for the reading history if the supplier rejects your correction.
Which wrong-reading problem is it?
| Problem | Likely action | Best page |
|---|---|---|
| Bill used an estimate | Submit actual reading and ask for rebill | /wrong-meter-reading-complaint-template/ |
| Meter serial does not match | Ask supplier to verify the meter record | /meter-serial-number-does-not-match-bill/ |
| Smart meter stopped sending reads | Provide manual reads and ask why smart data failed | /smart-meter-not-sending-readings-uk/ |
| Opening or closing reading wrong | Ask for reading dispute and transfer evidence | /energy-bill-dispute/ |
How to take a reading the supplier cannot argue with
Most rejected readings are rejected for one of four reasons, and all four are avoidable in the two minutes it takes to do it properly.
| Meter type | What to write down | What to leave out |
|---|---|---|
| Digital, single rate | The numbers left to right, before any decimal point. | Digits after a decimal point, and anything in a red box or after a red digit. |
| Digital, two rate (Economy 7) | Both registers. Usually R1 / R2 or Low / Normal. Record which is which. | Do not add them together — they are billed at different rates. |
| Dial meter | Left to right. If a pointer is between two numbers, take the lower. If it is exactly on a number, check the dial to its right: if that reads 0–1, use the number; if 8–9, use one lower. | The dial marked 1/10, and any dial in red. |
| Gas, metric (m³) | The black or white digits before the decimal. | Digits after the decimal, usually red. |
| Gas, imperial (ft³) | All the digits shown, ignoring red. | Do not convert it yourself — the supplier applies the conversion factor. |
| Smart meter | Press A or the display button until the total kWh appears. Economy 7 meters cycle through both rates. | The in-home display's figure — it is an estimate, not the billing register. |
The photo is the evidence, not the number. Take one shot showing the reading and one showing the serial number on the meter plate, or one shot with both in frame if you can. Phone photos carry the date in their metadata, which is exactly what you want if this ends up at the Ombudsman. Do not crop them or send screenshots of them — send the originals.
The in-home display is not the meter
This trips people up constantly. The IHD is a convenience device fed by the meter over a radio link. It can drift, lose sync, or show a different figure entirely. Billing runs off the meter's own register. When you take a reading, read the meter itself.
MPAN, MPRN and the meter serial number
Three different identifiers, and knowing which is which is what turns a vague “something is wrong” into a specific, answerable question.
| What it identifies | Where to find it | Does it change? | |
|---|---|---|---|
| MPAN Supply Number | The electricity supply point — the physical connection to your property. | On your electricity bill, in a grid box, usually starting with an S. 13 digits in the bottom row. | No. It stays with the property. |
| MPRN Meter Point Reference | The gas supply point. 6–10 digits. | On your gas bill. Sometimes called the M number. | No. |
| Meter serial number | The physical box on your wall. | Printed on the meter itself, and on the bill. | Yes — it changes every time the meter is exchanged. |
That last row explains most serial mismatches. A meter exchange should update the account record; when it does not, readings from the new meter get applied to the old meter's history and the figures go haywire. It also explains why the fix is usually quick once the right question is asked: the supplier only has to look at the exchange record.
The question that resolves it fastest
“Please confirm the meter serial number currently registered against MPAN [your MPAN] / MPRN [your MPRN], the date it was registered, and the serial number of any meter removed from this supply point. The meter physically installed at my property is [serial from the meter plate].”
Quoting the MPAN pins it to the supply point rather than to your account, which is what stops the answer being about the wrong property in a block of flats.
The rebill request, written out
Attach the meter photo. Send by email so the timestamp exists.
Point 4 matters more than it looks. Suppliers correct a bill and leave the overpayment sitting as account credit by default. If you want the money back, you have to say so.
If they reject your reading
Suppliers reject readings automatically when they fall outside an expected range. That is not a judgement about you; it is a validation rule. But the rule is theirs to justify.
| Reason given | What is actually happening | What to send back |
|---|---|---|
| “The reading is implausible.” | It fell outside a tolerance built from your previous consumption. | The photo, plus an explanation of why usage changed — new occupant, new appliance, home working, a long absence. |
| “It is lower than the last reading.” | Either the previous reading was an over-estimate, or the meter has rolled over past its maximum digits. | Ask which. Both are their problem to resolve, and an over-estimate means the earlier bill was wrong too. |
| “We use smart data for this account.” | Fine — if the smart data is arriving. | Ask for the date of the last successful automated read. If there is a gap, your manual reading fills it. See smart meter not sending readings. |
| “It does not match the register.” | Likely a two-rate meter with day and night swapped, or the wrong meter on the account. | Photograph both registers, note which is which, and check the serial number. |
A rejected reading should generate a message to you at the time. If the first you heard of it was a catch-up bill months later, that is a service failure worth naming in the complaint — it is also exactly the kind of failure that supports a back-billing argument if the period runs long.
Frequently asked questions
What if my supplier says the reading is too low?
Ask for the reading history and why the supplier believes your reading cannot be accepted.
What if the serial number is wrong?
Treat it as a meter identity problem. Send a serial number photo and ask the supplier to check the account meter record.
Should I use a complaint template immediately?
Use a focused rebill request first if the issue is simple. Escalate to a formal complaint if the supplier refuses or ignores it.
Should I read the meter or the in-home display?
The meter. The in-home display is fed over a radio link and can drift or lose sync; billing runs from the meter's own register. If the two disagree, the meter is right.
My reading was rejected as implausible. What now?
Send the dated photo and a one-line explanation of why usage changed. Ask what tolerance was applied and what the previous reading was. If the previous reading was an over-estimate, that earlier bill was wrong too.
The new reading is lower than the last one. Is that possible?
Yes, in two ways: the previous reading was an over-estimate, or the meter has rolled past its maximum and started again. Ask the supplier which one it is — both are theirs to resolve, and the first means an earlier bill needs correcting.
How far back can a wrong reading be corrected?
There is no fixed limit on correcting an error, but if the wrong readings meant you were not accurately billed for a period over twelve months old, the back-billing rules come into play as well.
Official sources used for this page
BillDecoded translates official process and billing information into practical checks. It is not affiliated with the Ombudsman, Ofgem, Citizens Advice, Which? or any supplier.