Your DTI is how lenders measure your ability to repay the loan based on your income versus monthly debt obligations. This includes your projected mortgage payment (principal, interest, taxes, insurance, and any mortgage insurance), plus your other monthly debts—such as credit cards, car loans, student loans, child support, alimony, 401k loans, and payments on any additional properties you own.

Understanding your DTI helps ensure your loan meets program guidelines and sets you up for long-term success.