Visitor

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18 Messages

Thursday, January 8th, 2026 7:53 PM

Excessive and inaccurate data usage

Having the issue reported by multiple people here: https://forums.xfinity.com/conversations/your-home-network/sudden-spike-in-data-usage/65091e84baecdd4ece0656b7?page=2

My router says we've used roughly 135gb so far this month, while the usage meter from the xfinity site claims nearly 500gb -- not the first time this has happened. Cable modem firmware is up to date (this is automatically kept up to date by Comcast, we aren't even able to update it ourselves) and the router is completely fine and secure.

How do we address this issue with the inaccurate and inflated data usage being reported by the xfinity site?

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Official Employee

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2.3K Messages

21 days ago

Hello user_d1xoc1 thank you so much for taking the time to reach out here on our Xfinity Forums! When disputes regarding data usage arise, our trained professionals at Comcast Customer Security Assurance can help! 

 

 

Customer Security Assurance
Business Hours: 8:00am - 12:00am EST, 7 days a week

Contact: 1-888-565-4329

 

This team is able to fully investigate network integrity and data usage concerns. 

 

Visitor

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18 Messages

@XfinityAlfonso​ I just got off of the phone with a representative from the number you linked above who said that there were no issues at all with the account or the hardware. What do you suggest to do now? There is no way that we've used this much data and this is clearly an issue affecting many other customers based on the messages posted in your support board here.

Official Employee

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2.3K Messages

Hello user_d1xoc1 thank you so much for following up on this, and letting us know what the CSA team had to say! That's great to hear that there are no account or hardware anomalies causing this apparent data mismatch. Do you have only internet service with us, or TV also?  Streaming from X1 apps does also count as data usage. 

 

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Visitor

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18 Messages

we only have internet

Official Employee

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2.3K Messages

Got it, @user_d1xoc1. Thanks for confirming! Other than reviewing what counts towards your data plan, your next best step is to speak with the CSA team. You may want to try again if the issue persists and/or see if an escalation ticket can be submitted on your behalf. Please let us know how it goes.

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Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

Visitor

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18 Messages

I've already spoken with CSA (as I posted above) and they said there was nothing they can do since there are no problems visible to them. This has been an issue with Xfinity for YEARS  for many of your customers (see https://forums.xfinity.com/conversations/your-home-network/sudden-spike-in-data-usage/65091e84baecdd4ece0656b7?page=2 for one example). I will ask again, what can be done to resolve this issue other than switching from Xfinity to another provider?

Visitor

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18 Messages

14 days ago

bumping this thread -- Any suggestions on how to resolve the incorrect calculation of data usage, that's still occurring, that Xfinity admitted was a problem on their end as early as October 2023? (link where Xfinity employee discloses that this is an issue on the Xfinity side and is not due to excessive customer data usage/activity: https://forums.xfinity.com/conversations/customer-service/data-usage-problem/65248627697e8c6b344613b3?commentId=6525eed896e42961f081febc&replyId=6526807a697e8c6b34462037 )

Official Employee

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2.7K Messages

Hello! Thank you for following up on this and for sharing that link. We completely understand your frustration, having concerns about data accuracy is significant, and we want to ensure you have full confidence in how your usage is being calculated. Please reach out to our CSA team for review and assistance. You can contact them by calling CSA Toll-Free Number: 1-888-565-4329.

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

Visitor

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18 Messages

as stated MULTIPLE times already, already contacted CSA, they said everything looks fine on their side, and have no advice to offer.

I ask again -- how to resolve the incorrect calculation of data usage, that's still occurring, that Xfinity admitted was a problem on their end as early as October 2023? (link where Xfinity employee discloses that this is an issue on the Xfinity side and is not due to excessive customer data usage/activity: https://forums.xfinity.com/conversations/customer-service/data-usage-problem/65248627697e8c6b344613b3?commentId=6525eed896e42961f081febc&replyId=6526807a697e8c6b34462037 )

Official Employee

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988 Messages

Good afternoon user_d1xoc1 we can certainly review your account. 

Please send us a direct chat message with your full name and complete service address to “Xfinity Support”. To do so, click on the chat icon located at the top right of this forums page.

 

To send a "Direct Message" to Xfinity Support:

 

Click "Sign In" if necessary

Click the "Direct Messaging" icon or  https://forums.xfinity.com/direct-messaging

Click the "New message" (pencil and paper) icon
The "To:" line prompts you to "Type the name of a person". Instead, type "Xfinity Support" there

As you are typing a drop-down list appears. Select "Xfinity Support" from that list

An "Xfinity Support" graphic replaces the "To:" line

Type your message in the text area near the bottom of the window and press Enter to send it.

 

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

Visitor

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18 Messages

@XfinityJon​ I have submitted a message there as you requested

Visitor

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18 Messages

@user_d1xoc1​ waiting on a response currently

Visitor

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18 Messages

17 hours ago

I just spoke with CSA who says that the engineering ticket was resolved with a finding that there is no issue with tracking data usage on the Comcast side, however our data usage is still wildly off (it's currently showing roughly 1.1TB used vs our router that shows roughly 600GB used). I was also told that there is no recourse at this point (short of switching providers). We don't have any unknown devices on our network, and all devices that are able to run antivirus are currently running antivirus (and we have not had any incidents involving malware). 

Can someone confirm whether there is any other step we can take to resolve this? At this point it seems like the only option we have is to find another provider and replace Comcast/Xfinity but I'd like someone from Xfinity to confirm this, thanks.

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