Not "really". Basically, that's because only those listed on the title and the mortgage that are legally obligated to pay the property taxes and mortgage interest can claim those expenses. Then the income received must be claimed 100% by you, since that's reported to only you on a 1099-MISC. Any monies you give to your brother are just a gift, and not tax deductible for you. Any expenses your brother pays are not deductible my him, since he has no legal obligation to pay them.