I just set up automatic refill because I'd heard THAT had no taxes. $34.88. Blegh.
This. I'm not sure I follow what people are saying about taxes being included in the prepaid price. The day I set up my prepaid service I bought $50 directly from T-Mobile online and they charged a little over $8 in taxes, so it came to $58.something.
I'm on the $30 plan, but bought $50 of airtime to be sure I had a cushion for extra minutes. I should have thought ahead and bought a refill card from a reseller to avoid the tax - I will do that going forward.