Some cable plans, such as those from Cox, Medicom, and Xfinity, come with data caps. Usually these are generous 1TB monthly allowances, with space for more than 400 hours of HD video streaming each month. You’ll struggle to exceed them but if you do, cable internet providers have different policies. They usually won’t cut you off but will charge you for any additional data you use. For example, Xfinity’s overage charges are $10 per additional 50GB of data, for a maximum of $200 a month. Cox also sells the 1% of its customers who exceed their data allowances 50GB add-ons for $10 apiece.