just for completeness, if you plan to publish on windows phone. Microsoft also charges a yearly fee, which is by far cheaper than the one from apple.
For Google it is just a one time fee, and you can publish as many games you like using that account.
One thing to keep in mind: The fee is just the allowness to publish apps on their platform. In addition to these fees, they also take a percentage for each single sell (app or IAP).