10% is pretty standard and BigLL absolutely right, there will be hidden fees and markups that come out of nowhere. The pros of a property management company include: they should be able to keep vacancies down and the reporting and record keeping should save you a lot of time (esp during tax time). However the cons include: they really cut into the profitablity of a rental (like I said, the 10% off the top is just the beginning - do not be surprised if when all is said and done your shelling out close to 20 or even 30% to them); second if this is the only unit that you need managed then they really don;t do anything that you couldn;t do your self (provided the unit is within 20 miles of you). In this case I would only recommend a property management company if the rental property was out of state.