Our debt to income ratio calculator for mortgage gives you an instant, lender-accurate picture of your financial health before you ever step into a bank. Enter your monthly income and debt obligations, and the tool instantly produces both your front-end and back-end DTI percentages side by side.
Lenders use these two numbers to decide whether you qualify for a conventional mortgage, FHA loan, or other financing. The widely accepted 28/36 rule means your housing costs should stay below 28% of gross income and all debts combined should stay below 36%, while FHA guidelines allow a back-end DTI up to 43%.
Beyond simply calculating your ratio, this calculator benchmarks your results against every major lending standard and tells you the exact dollar amount of monthly debt you need to eliminate to qualify. Whether you are preparing a mortgage application, recovering from a loan denial, or auditing your overall debt payoff strategy, this tool removes the guesswork completely.
How It Works
Enter your gross monthly income before taxes for both the primary applicant and any co-applicant, then input each monthly debt obligation — housing payment, car loans, minimum credit card payments, student loans, personal loans, child support, and any other recurring debts.
The calculator instantly computes your front-end DTI by dividing your housing payment alone by total gross monthly income, then computes your back-end DTI by dividing all combined monthly debts by total gross monthly income, expressing both as percentages.
Your results appear on a color-coded DTI gauge chart with green, yellow, and red threshold zones, a numeric breakdown table showing each debt category as a share of income, and a plain-English verdict card stating whether you currently pass the 28/36 rule and the 43% FHA qualified mortgage threshold.
The Gap Analysis box calculates the exact monthly debt reduction required to hit your chosen target DTI — 28%, 36%, 43%, or a custom figure — and a ranked priority list shows which specific debts to eliminate first so you can reach your target in the fewest possible payoff steps.