Managing broadband data caps can be aggravating, frustrating, and—if you go over and incur a penalty—expensive. But there's hope: You can learn to avoid going over your data cap, with a little knowledge and a bit of patience. Here’s how.

Two of the largest broadband ISPs, Comcast Xfinity and Cox Communications, still impose data caps—though they’re being phased out by many other service providers. If you exceed the limits (1.2TB/month for Xfinity, 1.25TB/month for Cox) you’ll pay $10 for every additional 50GB. AT&T still charges a data cap, too, though only for its legacy DSL service, according to Highspeedinternet’s data-cap registry. All of these providers allow you to pay extra for unlimited data, but who wants to do that?

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