Does internet tethering cost money?

[GenesisDH]

AT&T might not be able to tell if you're tethering going that route. However, I'm sure the amount of bandwidth you're taking up could cause some suspicion and flag your account.

From what the TOS states, any usage that can hinder others' data usage is grounds for overage fees or other charges.

You're safe if you tether occasionally... but don't overdo it.

[StealthBravo]

Stay away from the torrents when tethering

[abuthemagician]

I really only do simple browsing, or download tv listings for my Vista MCE pc hooked to my tv. Other than that I RDP into servers at work.