Debt-to-Income Ratio Calculator
Monthly Income & Debts
DTI Results
| Front-End DTI Ratio | — |
|---|---|
| Back-End DTI Ratio | — |
| Front-End Assessment | — |
| Back-End Assessment | — |
How to Use This Debt-to-Income Ratio Calculator
Lenders do not care how much you earn in isolation—they care how much of that income is already spoken for. DTI is the quick screen that tells you whether you are in conventional territory or need to pay down a car note before applying. Enter gross income, housing costs, and other debts to see both ratios and a plain-language assessment.
- Enter gross monthly income. Use pre-tax pay before deductions—the same basis mortgage underwriters use.
- Enter monthly housing expenses. Include rent or mortgage P&I, taxes, insurance, HOA, and PMI if you pay it.
- Enter other monthly debt payments. Car loans, student loans, credit card minimums—exclude utilities and groceries.
- Press Calculate. Review front-end DTI, back-end DTI, and the status labels for each.
Translate your DTI into a home price ceiling on the House Affordability Calculator, or estimate a mortgage payment on the Mortgage Calculator.
DTI Formulas and Practical Applications
DTI is a simple fraction dressed up in lending jargon. Picture your monthly paycheck as a pie: front-end DTI measures how big a slice housing takes; back-end DTI measures housing plus every other mandatory debt payment combined.
Front-end and back-end ratios
Front-End DTI = Housing Expenses / Gross Monthly Income × 100
Back-End DTI = (Housing + Other Debts) / Gross Monthly Income × 100
With $5,000 gross income, $1,200 housing, and $400 other debts: front-end is 24% and back-end is 32%—both within common conventional guidelines.
Typical lending thresholds
Conventional guidance targets 28% front-end and 36% back-end. FHA programs may stretch to 31% / 43% with strong compensating factors. VA focuses primarily on back-end near 41%. Higher DTIs are not automatic denials, but they often mean higher scrutiny or tighter rate sheets.
Frequently Asked Questions
What is a good debt-to-income ratio for a mortgage?
Conventional lenders often prefer a back-end DTI of 36% or lower, with front-end housing DTI at or below 28%. FHA may allow up to 43% back-end with compensating factors.
What is the difference between front-end and back-end DTI?
Front-end DTI includes housing costs only. Back-end DTI adds all other monthly debt payments such as car loans, student loans, and credit card minimums.
Should I use gross or net income for DTI?
Mortgage underwriting uses gross monthly income before taxes. This calculator follows that convention.
What counts as monthly housing expenses?
Include rent or mortgage P&I, property taxes, homeowners insurance, HOA dues, and PMI when applicable. Utilities are typically excluded.
How can I lower my DTI before applying for a mortgage?
Pay down revolving balances to cut minimum payments, avoid new loans, or increase income. Even paying off a small installment loan can improve back-end DTI.