How much money does it cost to play the PC version of FIFA 12 online?
Not regarding Internet or energy costs but only the connection to the server.
Playing Fifa12 on the PC is free. Unlike for example the Xbox 360 where a subscription to XBox live is needed, the PC version only requires an active internet connection and an original copy of the game.
So if you exclude costs for your connection, power and the original cost of the game online play is free.