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April 13, 2017
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I give meter readings each month, why is my bill still based on estimates?

  • April 13, 2017
  • 167 replies
  • 15219 views

Why, when I faithfully provide meter readings on time, each month, does OVO still give estimated readings on my bills?

Best answer by Darran_OVO

Updated on 15/08/25 by Abby_OVO

 

Meter readings, usage and estimates

 

If you haven’t had smart meters installed, we’ll send you a meter reading reminder a few days before your monthly summary is created. The easiest way to submit these readings is on the ‘Meter readings’ page of your online account or OVO app (download for Android or iOS):  

 

When’s the best date to submit a reading for my monthly summary?

 

The best date to submit your reading is on or just before the date shown on your bill - the email or text reminder you receive may suggest you enter this the day before to make sure it’s received on time. If you do enter the reading slightly early we’ll only estimate your usage between the date you entered the reading and the date the statement was generated, so it should be fairly accurate.

 

When I enter my reading how long does it take to update my balance?

 

Every time you enter a meter reading on your online account, your account balance is recalculated to include your usage costs up-to-date. The balance will usually update instantly although it can take up to 24 hours. It’s worth checking the balance before submitting your readings, so you can easily check that the balance has updated. If the balance show on your monthly summary is estimated, you can always check the accurate balance by submitting another meter reading.

 

How are my estimated readings calculated?

 

If we ever use an estimated reading on your monthly summary, this is calculated based on the last actual reading you gave and your Estimated Annual Consumption (EAC) to give us an idea of what the reading is likely to be. You can always correct any over or under estimated readings by submitting an accurate reading.

 

What’s the best way to avoid estimated statements?

 

As a smart meter can be programmed to send us a reading half-hourly or daily, we can always be sure we’ve got a reading on the date your monthly summary is issued. This will mean no more worrying about reading the meter manually and more accurate billing and usage information on your online account or OVO app (download for Android or iOS.

 

The following community topic may also be helpful here:

 

 

OVO member but not got a smart meter yet? - Book today!

 

Interested but not yet an OVO member? - Check out our plans!

167 replies

Newcomer
August 5, 2025

That’s why OVO has Heat Pump Plus. 15p/kWh for eligible Heat Pump usage 24/7/365. They’re not as bad as you think. It’s also an Add-On so you can enable it without breaking contract and racking up exit fees - you just attach it to your existing tariff.

Thanks!  I’ll check it out :)

Newcomer
August 6, 2025

Thanks Blastoise

 

I will send you a photo if you really think it is necessary and you tell me how! But the meter should connect but I am surrounded by hills. It is a year or two since I last got in touch with the help desk and I sent them a video but they told me it was no good so I assumed that they had counted the flashes. Actually I have ot tried that myself for a while 

Blastoise186
Super User
Super User
August 6, 2025

No worries.

You can post it here directly or email it to forum@ovoenergy.com if you’re struggling and a Forum Moderator will catch it for you.

Securing energy by zapping security bugs... For that is The Blastoise Way! Remember, I'm just like you - AI Powered Evil Geniuses aren't Staff!
Firedog
Super User
Super User
August 6, 2025

… readings are not cast in stone … the reading history ... will state the readings that you have entered
    

@puffin Physical readings can’t change. Estimated readings can be replaced by actual ones if they become available. For gas, readings are taken in volume terms, but may be converted to kWh in some places. This conversion depends on a factor which may not become available until some time after a reading is taken, so it’s quite possible for the kWh figure to change. The underlying volume figure won’t change.

  

… OVO is quite capable of changing the date/time or reading on the bill - even after you have downloaded it!
  

Again, readings are always stored with a date/time label. For manual readings, this will give the midnight preceding the actual reading time, so that any subsequent reading on the same day will necessarily be either identical or larger. Midnight belongs to two days, which is why the same reading can be labelled with the last date in the billing period and with the first date in the next period.

I’d be interested to see an example of dates, times and readings on bills changing from time to time. It would be really good if you could post before-and-after screenshots of a couple of bills exhibiting this behaviour; be sure to obscure any personal information you’re not happy about sharing.

Noel | I have no official status; I'm just a volunteer who comes here to help other customers. My gear: Aclara SGM 1416-B Electricity-only E7 meter; Chameleon IHD3-PPMID-AAA | It may look as if I know what I’m talking about, but don’t let that fool you. |
BPLightlog
Super User
Super User
August 6, 2025

I’d be interested to see an example of dates, times and readings on bills changing from time to time. It would be really good if you could post before-and-after screenshots of a couple of bills exhibiting this behaviour; be sure to obscure any personal information you’re not happy about sharing.

I think what is being referred to is the occasional billing update which does replace any previous dated bill on the account history. Agreed, any actual (non-disputed) reading should not change

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
Newcomer
August 6, 2025

I think that I must apologise, I may have been a bit tired yesterday. It was about 2-3 years ago and the change in datetime may have been that date given on the bil was the download time. I also think that you are right and it was the value that I was complaining about plus the fact that the b/F value did not agree with the c/f value from the previous bill as I had downloaded it. So yes it may well have been the gas calculations that were the problem. I did give up on the problem in the end so was just talking from the top of my head!

 

Many apologies for bringing that into the equation.

 

I think I have found how to add the picture to this and will try it. I normally use attachments! Here is a photo of my meter. As I say I believe that there is no problem with it, just a geographical one!

 

My Electricity Meter

 

Abby_OVO
Community Manager
Community Manager
August 7, 2025

Hey ​@puffin 

 

Glad to see some of our community members have already stopped by to help out here.

 

Does the reading on your meter match the readings you see on your account? Do you know if the meter is set to send half hourly readings or is it set to maybe just monthly? This could be one of the reasons we might have estimated the usage.

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Newcomer
November 30, 2025

It seems like constant issues for everyone involved. I've given up at this point, as it's clear they have major internal problems and aren't being honest. My bills and readings are consistently incorrect, and the amounts on my emails and online account statements never match up. Was only able to access online account couple of months ago. They’ve even claimed I didn’t have an account until September last year, despite having been with them since 2023, with statements sent to my email to prove it. One previous statement even said I owed £5,000 for a single month! I live in a 3-bedroom house with one adult and two children—hardly the kind of usage that would result in that amount.

 

If, after two years of complaints and multiple attempts to contact them, they still can’t explain or provide accurate bills, then I simply don't understand how my direct debit has been stopped. This has been going on for far too long.

Firedog
Super User
Super User
November 30, 2025

No-one in these forums has access to your account, so we can’t explain or advise unless you share some details of what’s going wrong. This is a forum open to anyone, so whenever you post details, please make sure to remove any personally identifiable information like name, address, phone number, email address, account no., meter serial number or MPAN. 

We could start by looking at a screenshot of a recent bill, along with your comments about what’s wrong with it. Please tell us, too, precisely what sort of meters you have. A clear photo of them would help a lot.

You may be being confused by OVO’s ‘live billing’ system, which updates your account balance every day so you can see exactly what’s going on. If you have a smart meter, it’s a good idea to opt for half-hourly readings. You can then see in the online account just how much energy you’re using and when, and the daily balance will be accurate. 

 

Noel | I have no official status; I'm just a volunteer who comes here to help other customers. My gear: Aclara SGM 1416-B Electricity-only E7 meter; Chameleon IHD3-PPMID-AAA | It may look as if I know what I’m talking about, but don’t let that fool you. |
Ben_OVO
Community Manager
Community Manager
December 1, 2025

@Bluebbee6 I agree with Firedog here. We’d love to help you, but can’t without further info. 

 

Could you give a bit more of a description of what issues you’ve actually encountered. You say that you have no online account, and no Direct Debit - I’m wondering whether you might now be on Pay As You Go (top-up), rather than Pay Monthly?

 

We’ll await more info from you.

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