There are many ways to earn money here. Affiliates and Adsense being the two biggies. Key is to write content that is keyword rich and original, no copy paste, and make it informative. Have those ingredients and traffic should follow...traffic = money. But to answer the question..it depends on how much you want to work, and what you do. Some are happy to make $40 or $50 a month, some, like me, make a good full time living online..although mine is not through hubpages..its a great place to start.