To calculate your DTI, add up all of your monthly debt payments and divide them by your monthly income before taxes. Monthly debt payments include things like auto loan payments, student loans and credit card bills.2
(Total debt payments / Gross monthly income) x 100 = DTI
For example, if your monthly debt payments are $2,100, and your monthly income is $6,000, your debt-to-income ratio is 35%. Knowing this very important metric will give you more insights into whether or not you can get a mortgage with a high debt-to-income ratio.