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Debt-to-Income Ratio Calculator

Updated January 2026

A debt-to-income ratio calculator helps you understand what percentage of your gross monthly income goes toward debt payments. Lenders use DTI to evaluate mortgage applications — knowing yours helps you prepare for a loan application or assess your financial health.

How to Use This Calculator

Enter your gross monthly income (before taxes). Then add all your monthly debt payments: housing payment (mortgage or rent), auto loans, credit cards, student loans, personal loans, and any other recurring obligations. The calculator shows your front-end DTI (housing only) and back-end DTI (all debts), with color-coded status indicators based on standard lender guidelines.

How It's Calculated

Front-end DTI = (Monthly Housing Payment / Gross Monthly Income) × 100

Back-end DTI = (Total Monthly Debt Payments / Gross Monthly Income) × 100

Typical lender guidelines: Front-end ≤ 28% is ideal, Back-end ≤ 36% is ideal. Back-end up to 43% may be acceptable for some loan programs. Housing payment includes principal, interest, taxes, insurance, PMI, and HOA dues.

Frequently Asked Questions

Most conventional mortgage lenders prefer a front-end DTI (housing payment only) of 28% or less and a back-end DTI (all debts including housing) of 36% or less. FHA loans allow up to 31%/43%, and some lenders accept up to 50% back-end DTI with strong compensating factors like excellent credit or large reserves. USDA loans typically require 29%/41%. The lower your DTI, the better your chances of approval and the more favorable your interest rate.
Your front-end DTI is calculated as (total monthly housing payment / gross monthly income) × 100. Your back-end DTI is (total monthly debt payments including housing / gross monthly income) × 100. Monthly debt payments include mortgage or rent, auto loans, student loans, minimum credit card payments, personal loans, child support, and alimony. Expenses like utilities, groceries, and insurance are not included in DTI calculations.
You can lower your DTI by increasing your income (raise, side hustle, second job) or decreasing your monthly debt obligations (paying down credit card balances, paying off small loans, or avoiding new debt). Even paying off a single car loan or credit card can significantly improve your ratio. You can also increase your down payment to reduce the monthly housing payment you'll need.

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