Debt-to-income ratio, or DTI, is monthly debt payments divided by gross monthly income, expressed as a percentage. It helps describe your existing payment commitments. A household budget answers a different question: how much cash remains after all spending and savings needs?
Compare a fixed-payment scenario in the debt payoff calculator.
Calculate your ratio
Add the monthly payments included in your calculation, such as auto loans, student loans, credit card minimums, and a housing payment when applicable. Use income before payroll deductions. When applying for a loan, ask the lender which debts and income sources it counts, especially for variable income, deferred loans, or a proposed housing payment.
Use the credit-history guide to organize a report review.
Use the DTI calculator with your totals. A person with $1,200 in included debt payments and $4,800 gross monthly income has a DTI of 25%: 1,200 ÷ 4,800 × 100.
There is no universal approval cutoff
Different loan programs and lenders use different underwriting requirements. DTI alone does not establish eligibility, an interest rate, or approval. Avoid treating an old rule of thumb or a general percentage chart as a promise that a lender will accept an application.
Test affordability using take-home pay
Suppose take-home income is $3,700. After $1,200 in included debt payments, $2,500 remains before any living costs not included in DTI. If those costs and planned savings total $2,300, the remaining margin is only $200. This illustration shows why a seemingly manageable DTI may still leave little room for a new bill.
Compare the loan scenario with a take-home-pay budget. Use actual essential costs even if they exceed a percentage target.
Improve the underlying numbers
Reducing a debt balance does not always immediately lower its required monthly payment. Check the lender’s payment treatment before assuming a lump sum will reduce DTI. Paying off an entire obligation may remove a payment, but consider whether that would leave you without a reserve. A longer loan term may lower a payment while increasing total interest.
Before submitting an application
Save the statements and income records used in the estimate. Check proposed terms with the lender. Recalculate after a payoff, pay change, or new obligation, and use the same definitions so the comparison is meaningful.