Calculate front-end and back-end debt-to-income ratios using monthly gross income, housing costs, property tax, insurance, and monthly debt payments.
Formula
Debt-to-income ratio compares your monthly debt obligations with your monthly gross income. Front-end DTI focuses on housing costs, while back-end DTI includes housing plus other recurring debts.
Lender planning
A lower DTI can make a borrower look less stretched because more income remains after monthly obligations. A higher DTI may reduce borrowing flexibility or require stronger credit, more reserves, or a lower loan amount.
Use cases
Use it before applying for a mortgage, comparing affordability, planning debt payoff, or checking how a new loan may affect your monthly borrowing profile.
Review monthly income, housing costs, debt payments, and lender-style thresholds before making a borrowing or budgeting decision.
Review monthly income, housing costs, debt payments, and lender-style thresholds before making a borrowing or budgeting decision.
Review monthly income, housing costs, debt payments, and lender-style thresholds before making a borrowing or budgeting decision.
Review monthly income, housing costs, debt payments, and lender-style thresholds before making a borrowing or budgeting decision.
Review monthly income, housing costs, debt payments, and lender-style thresholds before making a borrowing or budgeting decision.
Review monthly income, housing costs, debt payments, and lender-style thresholds before making a borrowing or budgeting decision.
Calculator details
Last updated: July 2026
Formula used
DTI Ratio Calculator uses the values you enter to estimate totals, rates, percentages, payments, balances, or comparison results for planning.
Assumptions
Example calculation
Enter a simple dti ratio calculator scenario, review the estimated result, then adjust one input at a time to compare outcomes.
When to use this calculator
Calculate front-end housing debt-to-income ratio
Disclaimer
This calculator is for estimation and educational use only. It does not replace professional financial, tax, legal, mortgage, investment, or accounting advice.
Questions
Debt-to-income ratio compares monthly debt payments to monthly gross income. Lenders use it to understand how much of your income is already committed to debt obligations.
Front-end DTI compares housing costs such as rent or mortgage, property tax, and insurance to monthly gross income. It focuses only on housing-related payments.
Back-end DTI compares total monthly obligations to gross income, including housing costs, car loans, student loans, credit cards, and other recurring debt payments.
No. DTI is only one factor. Lenders may also review credit score, assets, employment history, loan type, down payment, reserves, and underwriting rules.
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