I have seven. That is pushing the limits for the size of my house. Also most of my cats are set in their ways at ages 8 & 9 (Fluffy is the baby at age 4) and would have real problems accepting another cat. Poor Stumpy has problems with the ones I have now. She's my anti-social girl. That would be the major issue in any decision to take in another cat. Financially, I can afford more and the additional work of litter boxes and feeding would not be a problem.