I realize that this is an old post, but there is a lot of misinformation in this thread regarding rental income and calculating DTI.
Here is how it works.
1. Add up the total of your gross monthly income from wages/salary, child support, alimony, commissions, etc. For this portion of the income calculation, rental income is not included.
2. Add up all your monthly recurring debt obligations that will not be paid off within six months. Primary residence mortgage, HOA fees, car loans, minimum payment on credit cards, student loans, personal loans, etc. For this portion of the debt calculation, rental expenses are not included.
3. Now, look at your tax return Schedule E. Take 75% of your annual rental income and subtract 100% of your annual rental expenses. Do not include depreciation in your calculations. Divide the result by 12 to get your monthly NET rental income or NET rental liability. If the answer is a positive number, you have income, otherwise, you have a monthly liability.
4. Add the net monthly rental income to your gross monthly income in step 1. Or, add the net monthly rental liability to your monthly debt obligation in step 2.
5. Divide the total monthly debt obligation by your total monthly income to get your DTI.