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Octopus Energy - £4k elec bill for 11 months?

90 replies

Watchoka · 13/08/2025 20:30

Trying to help my brother.

He lives in a 2 bed flat on his own and works in an office during the day. Only has electric.

When he moved in in 2023 Shell was the electricity provider.

Octopus took over Shell in Feb 24

Since he moved in he has paid £135 per month for electricity.

In January 25 Octopus sent him a bill for £4k without explanation.

There were a series of charges made to his account in one day and then credits made on another day and then charges made again (all on one day) all adding up to approx £4k. Again no explanation.

my brother called them and they said he had only been paying estimated amounts and he had now been billed for actual usage for the last 11 months (amounting to £4k in 11 months)

I queried with Octopus whether the charges related to electricity used more than 12 months ago (back-billing) and they said no. They said they checked the account and the charges were correct. They did say that they attempted to install a new meter in May 25 but couldn’t. They didn’t say why they were installing a new one or whether the old one was faulty.

I’ve checked the usage amounts on all his bills and they just don’t add up for one person in a small apartment who is out most of the day.

The Customer Service Advisor appeared almost ecstatic when he came back to say the £4k for 11
months still owed.

I’m not sure where he goes now. The billing just doesn’t make sense and no real explanation has been given about the charges piled on in Feb 25.

Anyone had a similar experience please?

any help would be very much appreciated please

OP posts:
Iwrotethelyricstoaxlf · 13/08/2025 23:46

how long does the 4k span over.

There’s something about it charging back over 12 months.

He needs to do a reading and then submit another possibly each week to get a base line on what the meter is reading/what he’s using.

StevieAnnSENMum · 13/08/2025 23:43

I used to work for Octopus. I haven't worked for Octopus for nearly 2 years now, so some of my knowledge may now be outdated, but I am hoping it isn't so that I can be of some help. Sorry in advance for the long reply.

Firstly, you need to ask them to re-bill his account up to date. The general advisors you talk to on the phone can do this, but if it's a more complicated case, they may pass it onto a billing expert.

If your brother doesn't have a smart meter, does he send in his meter readings every month himself, or does he not do this and therefore Octopus have to estimate the usage? This can also massively contribute to "debt" that isn't really debt, but because they're going off of estimates rather than actual readings, they'll be using estimates from other similarly sized properties.

If your brother can't access the meter due to mobility reasons, he can ask Octopus to come out and read his meter every 3 months (I believe it is).

Second of all, get the MPAN from his electric meter and check that it matches the one they have on his account. MPANs get mixed up more often than you'd think.

I also agree with @RollerSkateLikePeggy. Get him to write down the kWh usage that is currently displaying on his meter. Then, get him to turn off all of his appliances at the sockets for 10-15 minutes (except for the fridge and freezer). After 10-15 minutes, he needs to go to his electric meter again and write down the new kWh usage. If it's the same, it's unlikely that the MPAN is wrong or that someone is stealing his electricity supply. If it's gone up, more than you would expect it to with everything being turned off, it's more that it could be a crossed meter or that someone else is using his electricity supply. You can contact Octopus and they will tell you specifically how to do this, if I haven't been clear enough.

Also, start an email thread with them. They say the calls are recorded, but sometimes the recording fails and advisors can't listen back to previous calls (though they need to ask for your brother's permission to do this).

It could also be that his day rate and night rate run separately. Day rates are usually more expensive because more appliances are being used, whereas night rates are generally cheaper. (This is called Economy 7, and is common in electric-only households).

Octopus are fantastic and will help you to the best of their ability.

Maxme · 13/08/2025 23:43

We had a similar overcharging problem with octopus. Basically the old meters (with dials rather than digital displays) are in imperial measure rather than metric. This means the numbers go up approx 3x faster due to the conversion.

When we moved to octopus they marked us as imperial and charged us 3x amount even though display was clearly digital.

As your 4k figure is approx 3x larger than expected this may be the same issue. So check your daily usage and that the meter is digital and if approx 3x then ask for it to be logged as a formal complaint.

Edit: you can see on gas bill what unit you are being billed in matric should be in m3

spoonbillstretford · 13/08/2025 23:42

Also they owe me for electricity export as we have solar panels. No credit since May. There has been a lot of sun since then and they owe me £150.

TheCurious0range · 13/08/2025 23:39

No way that can be accurate, is he paying for the whole block?
We're with octopus, have underfloor heating in kitchen and bathroom, do 8-10 loads of washing a week, live in an old house with high ceilings and I'm not swaddling up in Oodies and blankets in the winter, the heating is on. We pay £200 a month and usually end up with a little credit left by the end of the winter.

spoonbillstretford · 13/08/2025 23:33

And he's already paid about £1,500 and they want four grand on top of that? Fuck off.

Octopus are better than some but I still don't trust any of them. They are supposed to do monthly billing but can't seem to manage that and keep leaving it two months, or randomly deduct money from my credit several days before the bill is produced. I wanted bills on 1st of the month, but they do it on 8th. When they remember as half the time they seem to forget and do it on a random day. Does my head in.

spoonbillstretford · 13/08/2025 23:28

That sounds clearly wrong. At tbe height of high energy prices ours was that for a year for five people gas + electric for 12 months.

charliehungerford · 13/08/2025 23:23

I’m with octopus. House is a three bed/three reception room 1500 sq ft and is totally electric for heating, cooking and hot water. Two
people. £100 per month in the summer and around £180 in winter. Total over a year is around £1700, we are also home most of the time as retired. Something is clearly wrong. He needs to take a meter reading every day for seven days to work out the amount of kWh he is using every day and multiply it by his kWh price and add the daily standing charge. I’d suggest If it’s more that £4 a day this time of year something is wrong. Turn everything off at the mains and see if the meter still moves significantly, also properly check the immersion if he has one as if he leaves it on 24/7 it will eat it up.

owlyboo · 13/08/2025 22:56

I’m with octopus, 3 bed townhouse, 2 kids and me. I work from home. I pay around 140 a month for gas and electric. I have a smart meter. That amount sounds insane. The amount he’s been paying seems very high as it is but guessing maybe his heating and cooker etc. is all electric.

CozyCoupe · 13/08/2025 22:51

We live in a 5 bed detached, family of 5. We have an immersion that gets used too frequently, underfloor heating, an electric car and our usage (actual usage not the DD) is approx 130 pm in summer rising to 190 ish in winter. There is no way he can be using that much electric unless someone has tapped his meter!

MJ1980 · 13/08/2025 22:30

That’s ridiculous and i would think its wrong. I pay no where near that for mine and im a family that leave lights on/tvs blaring (thanks kids). Is there an ombudsman you can complain to? Any of his neighbours in similar situation?

Watchoka · 13/08/2025 22:26

Thanks @RollerSkateLikePeggyill get him to do this tomorrow.

@cyvguhbhe can’t apparently have a smart meter. I think it’s odd they have suddenly tried to replace his meter but haven’t confirmed if his current one is faulty.

I’ve no idea how to unpick all the readings and changes. Octopus just say - it’s fine we’ve checked it and you owe £4k

OP posts:
cyvguhb · 13/08/2025 20:53

The first question is always do you have actual meter readings or is it a smart meter

RollerSkateLikePeggy · 13/08/2025 20:41

Have you/he checked his actual usage in a day? Checked whether he had left an immersion heater turned on? Turned off everything and checked if the meter is still running? The first thing is to try to work out if the bill is actually potentially accurate.