What Is Debt-to-Income Ratio and Why Lenders Care

DTI in One Sentence

Your debt-to-income ratio is the percentage of your gross monthly income that goes to debt payments. If you earn $5,000 a month and pay $1,500 in debt obligations, your DTI is 30%.

Why Lenders Use It

DTI tells lenders how much of your income is already committed to existing debts. A low DTI means you have room to take on a new payment. A high DTI means you're stretched thin and more likely to miss payments. It's one of the primary factors in mortgage, auto loan, and personal loan approvals.

Most mortgage lenders want a total DTI below 36%, with housing costs under 28%. For personal loans, staying below 35% keeps most options open. Above 43%, many lenders won't approve a mortgage at all.

Calculating Yours

The DTI Calculator on DebtCalc makes this simple. Enter your gross monthly income and all monthly debt payments — credit cards (minimums), car loans, student loans, mortgage or rent, personal loans, child support. The calculator shows your DTI and where it falls on the lender spectrum.

LendingTree lets you see what loans you might qualify for based on your DTI and credit profile, giving you a concrete picture of where you stand.

Improving Your DTI

Two levers: increase income or decrease debt payments. Paying off a credit card drops those minimums from the calculation entirely. Refinancing to a lower rate can reduce monthly payments. Even a small improvement — from 38% to 34% — can be the difference between approval and denial on a major loan.

Your DTI is a snapshot. It changes as you pay down debts and as your income shifts. Check it periodically, especially before applying for any new credit.

DTI uses gross income, not net. If you're not sure of the difference, PaycheckTools explains it clearly.