Comcast has rolled out a new pricing structure for Internet customers.
The company is capping data usage at 300 gigabytes per month on its $40 tiered price.
Customers who go over the limit will be charged additional fees.
The new pricing was rolled out only in Nashville and Tucson, Arizona.
Comcast customer Stacye Sullivan told Nashville's News 2 she found out about the new rate when she received a letter in the mail.
"I thought, 'Oh boy, we're in trouble,'" she said.
Sullivan said her family has two Xbox gaming stations, three desktop computers, five laptops, four iPhones, one iPad and five iPod Touch devices.
"The kids are either doing homework, looking up songs [or] looking up videos on YouTube. My seven year old likes to watch funny cat [videos online]. So every week when there's a new funny cat video we all have to watch it at least once," Sullivan explained.
Sullivan said she hasn't gone over the 300 gigabyte cap, at least that she knows of.
"Comcast has this little calculator you can use [and] you can play with and [see] how many hours you spend streaming music, videos that kind of thing," she said. "All I could think about was the old AOL days where you had to log in and it showed you how much you had. If you went over you got billed. We pay a pretty good bill already, so we really need to be careful that we don't go over," she said.
Comcast is offering customers a grace period.
Those who go over the cap limit will receive an extra 50 gigabytes of data, along with a letter or e-mail notification.
If the data usage exceeds the cap three times, the customer will see an additional $10 on their bill for each additional 50 gigabytes.