Subscrptions

[Saneko-ragnaros (Saneko)]

You did ask this some month earlier here which was answered:

Wow tbc subscription need help

It’s important to distinct between subscription and game time. You can buy game time with balance but the only option is 60 days so you’ll have to add more balance to do that. A subscription is recurring and has more options (1, 3 and 6 months) but cannot be bought with blizzard balance.