9.99$ and if you pay for 3months you get 9.99$ for life and a chocobo and your name in the 2.0 credits and you can make 8 char in each world for a low price of 9.99$ lol
"The campaign recognizes those players who subscribe to FFXIV for 90 or more cumulative days during the period between January 6, 2012, and the commencement of version 2.0 beta testing."
Just so you don't get confused.
Can also look here for more info about that.
But as the others have said currently each month the game costs just $9.99 per month to play until SE launches FFXIV 2.0 .