Obviously this depends on the location and the management company. Mine takes 50% of the first month's rent for finding & qualifying a new tenant, then 8% of the following rent payments. So far they have done a decent enough job - I just have to prod them on repairs to not use the absolute cheapest approach (my theory is a nicer house can justify a higher rent, vs. all the ones in the market that are run by corporate landlords and look like it)