TransUnion: $10
Experian: $10.70
Equifax: free (they made it free after they were hacked - until June 30th)
Innovis: free (always free as far as I can tell)
And it worked really, really well. I had to apply for a corporate Amex at work soon afterwards. I was rejected because my credit was frozen and was asked to call. I temporarily unfroze my credit while on the phone (on Equifax, because it was free) and Amex ran my credit right then and approved me.Having that kind of control was amazing. If I need to allow a credit check, I can do a 24 hour or 7 day unfreeze. It's such a minor inconvenience for completely blocking credit thieves.