Debt-to-Income Ratio Calculator
Calculate back-end DTI, front-end housing ratio, borrowing headroom, income needed for a target DTI, and compare scenarios with detailed breakdowns.
DTI Ratio, Housing Ratio & Headroom Estimator
Use monthly debts and gross income to compute DTI, housing ratio, remaining borrowing capacity, and income targets with clear, lender-style math.
How lenders interpret the debt-to-income ratio
Debt-to-income ratio, or DTI, compares recurring monthly debt obligations with gross monthly income before tax. The general formula is DTI = monthly debt payments ÷ gross monthly income × 100. If debt payments total $1,400 per month and gross income is $4,000, the resulting DTI is 35%. Changing the income denominator to take-home pay creates a different measure and should not be confused with the standard gross-income calculation.
Common recurring obligations may include housing payments, car loans, student loans, minimum card payments, and other debts that a lender requires you to disclose. Utilities, groceries, and other normal living expenses are important for household affordability even though they may not enter a lender’s DTI formula. Some lenders also distinguish housing-only payments from the ratio that includes all recurring debt.
DTI limits are not universal approval rules. Different loan products and underwriting systems may consider credit history, assets, interest rates, income stability, and regional regulations. Use the result to understand cash-flow pressure and compare scenarios, not to infer guaranteed mortgage or consumer-loan eligibility.