Calculate royalties from your audiobooks and compare Amazon royalties through ACX with BooksOnline. As with eBooks, BooksOnline pays authors far more, especially when you include our generous 30% affiliate fee program. BooksOnline pays 60% to audiobook authors (30% base royalty plus 30% from all sales through their personal affiliate link) plus another 30% for all their audiobooks sold by affiliates. ACX also determines the price of your audiobook based on its length, and they often reduce the price without your permission, part of their one-sided licensing agreement they force you into. With BooksOnline you determine the price of your audiobooks, and we don’t touch that.