DTI is a lender lens on your budget
Front-end DTI is housing payment divided by gross monthly income. Back-end adds car loans, student debt, minimum card payments, and other recurring obligations.
Many conventional programs screen near 28% front-end and 36–43% back-end, but guidelines vary by product, credit score, and reserves.
DTI ignores lifestyle costs — childcare, commuting, insurance — that still matter for your comfort. Use it as one input, not the whole picture.