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Rank 5
October 1, 2023
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Live billing, meter readings and understanding my online account

  • October 1, 2023
  • 50 replies
  • 1834 views

My understanding is that you put in Actual meter readings on the last day of your current billing period then you get a bill based on those readings 

If this is the case then why am I getting an estimated reading on my heating meter only on the 30 th September when my current billing period ends on the 8 th October which is when I should submit actual readings to obtain up to date bill for that period  I only have  electricity energy Not  gas 

Best answer by Tim_OVO

Updated on 05/08/26 by Ben_OVO

Hi @Pilgrim2,

 

Yep you’ve pretty much nailed it in terms of when to provide a reading, although you can also provide a reading on any date and your balance will update accordingly. 

 

 

 

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 statement?

 

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 shown on your monthly statement 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 statement, 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 statement 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)

 

 

50 replies

Abby_OVO
Community Manager
Community Manager
September 25, 2025

Hey ​@Sar19 

 

Sorry to hear this.

 

It should show on the bill what that £70 charge is made up of and from when. Would you be able to share a screenshot? (removing any personal details)

 

That would help in trying to advise where it may have come from. Did the Support Team look at the meter connectivity while you were on with them to try and get the smart meter communicating again to avoid this in future?

 

I’ve linked below to a couple of topics which might also be helpful here:

 

I hope this helps take you a step in the right direction, if you can share a screenshot that would help us advise in more detail but as it’s an account specific issue we can only make our best suggestions at this stage.

Currently Playing: She's Electric
Newcomer
September 25, 2025

Hi Abby_OVO 

 

unfortunately I can’t give you a screen shot as this happened over the phone.  I rang your customer services as I couldn’t get access to the app.  The member of staff solved the issue and confirmed that my account was in credit of £130 which I checked on the app.  She then asked me for an electricity meter reading which I gave.  Whilst on the phone I saw that my balance had suddenly reduced to £60 on the app.  When I queried why £70 had suddenly been removed from my account I was told this was because the last estimated bill was less than the meter reading I had just given.  The call taker said my smart meter wasn’t sending readings and so she would get an engineer to come and upgrade it.  Bearing in mind I had just paid the last bill 9 days ago I asked again how an extra 33 units could have suddenly cost me £70.  The call taker just kept repeating it was the difference between the estimated bill and the meter reading.  She would not explain how 33 units had resulted in £70 being removed from my account and then abruptly put the phone down on me.  I can’t get a straight understandable answer as to why OVO has removed £70 credit from my account!

 

Rank 2
September 25, 2025

how is it that your meter reading is allways in hole numbers but when you get the bill there is allways fractions after the whole numbers .

Blastoise186
Super User
Super User
September 25, 2025

Howdy ​@delboy61 ,

That’s because ALL Smart Meters do record to three decimal places, but most of them don’t show it on the display - Aclara is one of the only exceptions where you can get the entire reading out of it if you know where to look.

The decimal places don’t usually do much to the bill however - you’re talking just a few pence at most and it’ll balance out by the next bill anyway.

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!
Abby_OVO
Community Manager
Community Manager
September 26, 2025

Hey ​@Sar19 

 

Thank you for that information. 

 

You’ll still be able to see where this has come from when the bill is produced. Have you checked the app since for an amended bill? 

 

Without any further context or ability to view the history, it can be very tricky to identify the issue as this is specific to your account, and we don’t have access to accounts here at the Forum.

 

If there’s no new bill, would you be able to share a screenshot of the last bill? I’d also suggest reaching back out to the Support Team to have an amended bill produced based on the new reading so they can explain where this has come from. 

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Firedog
Super User
Super User
September 26, 2025

how is it that your meter reading is allways in hole numbers but when you get the bill there is allways fractions after the whole numbers .
  

If you have a non-smart meter you have to read yourself, the readings you submit will be in whole numbers. Modern smart meters automatically submit readings with three places of decimals (i.e. to the nearest Wh). Older ones send readings with two decimals. 

If you’re seeing readings with three decimal places on your bills, it’s likely that they are estimates. If you submit a reading before the end of the billing period, the billing system will estimate your usage to the very end of the period with three-figure precision. You can avoid this by submitting a reading each month in the morning of the first day of the billing period. For example, if your bills run from the 16th of the month to the15th of the next month, submit your reading in the morning of the 16th of each month. If your billing period is the calendar month, submit on the 1st of each month. 

Better still, ask for a smart meter to be installed. It’s completely free! 

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. |
Firedog
Super User
Super User
September 26, 2025

Aclara is one of the only exceptions where you can get the entire reading out of it if you know where to look.
 

@Blastoise186 It is two years ago today that my Aclara SMETS2 meter was installed. I’ve never found out how to see the meter readings (two of them for Economy 7) with decimals. I can see the total reading on the IHD, but the meter display itself shows only whole numbers. What’s the secret?

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. |
Newcomer
September 26, 2025

All my bills for the past few months have been amended.  All are now dated 25/09/25 so I’m not sure how that would assist.  All the readings on the bills are the same but the amounts have all been changed and the original bills are now longer available on my account.  I’m now £70 out of pocket and my bills have all been altered

Firedog
Super User
Super User
September 26, 2025

All my bills for the past few months have been amended … All the readings on the bills are the same but the amounts have all been changed ...
  

This would suggest that the billing people have found a reason to amend the opening balance some months ago. This will of course necessarily change all subsequent bills*. 

Most customers get an email once a month headed something like Your latest energy bill with the bill attached as a PDF. Do you have these emails since the time before the bills were amended? You should try to find the oldest changed bill together with its new version and, if you can’t spot what happened, post redacted photos of them here. 
  


There are many who think this isn’t right. If there has to be an historical amendment, it should result in a new statement explaining what the change is and showing the adjustment - whether credit or debit - as a separate item. The closing balance on this statement would then become the opening balance for the next regular one. 

 

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. |
Newcomer
September 27, 2025

Hi, it’s quite a confusing situation to me.  I don’t get bills by email. All my bills are shown on my app.  All bills were generally the same amount each month and showed the opening and closing balance.  Whilst on the phone to OVO over something unrelated, the call taker asked me for a meter reading for electricity as my smart meter hadn’t been sending readings through.  I gave her a reading which was 33 units higher than my last estimated reading so she said she would adjust my account.  As I watched on my app, my balance credit went from £130 to £70 and when I asked why she said because the new reading was higher.  I asked how 33 units had just cost me more than a month’s electricity bill and she couldn’t explain why, she just kept saying the new reading was higher.  When I checked my old bills on my app, the opening and closing balances and amounts paid have all changed and the old ones are not there any more.  Since that day the credit balance on my app has been decreasing daily as though OVO are taking money every day from my account and not once a month as usual.  I can’t get a straight answer from them.