Cash flow implications of converting primary mortgaged residence to rental
The rental income is indeed taxable income, but you reduce the taxable portion of it by deducting expenses (including mortgage interest, maintenance, insurance, HOA, real estate tax, and of course depreciation). Due to the depreciation, you may end up breaking even, or having very little taxable income. Note that when you sell the property, your basis is reduced by the depreciation you were allowed to deduct (even if you haven't deducted it for whatever reason), and also the personal residence exclusion might no longer be applicable - i.e.: you'll have to pay capital gains tax. You will not be able to deduct a loss though if you sell now, so it may be better to depreciate it as a rental, rather then sell at a loss that won't affect your taxes. Also, consider the fact that the basis for the depreciation is not the basis you currently have in the property (because you're under water). You have to remember that when calculating the taxes. This is not a tax advice, and you should seek a professional help.