What Is the Debt-to-Income (DTI) Ratio?
43% is the highest DTI ratio a borrower can have and still get qualified for a mortgage. Ideally, lenders prefer a debt-to-income ratio lower than 36%, with no more than 28% of that debt going towards servicing a mortgage or rent payment. (Investopedia)
A low DTI ratio indicates sufficient income relative to debt servicing, and it makes a borrower more attractive.