Please take a look at the EULA and/or the FAQ (Releasing Products) for more details on royalties. In short, yes, you owe a royalty of 5% of all gross revenue for the product (after the first $3,000 in gross revenue per quarter).
If I develop a game and sell it or if I raise money on kick starer will I have to pay fees or royalties, and how mcuh will that cost.