What Is the Debt-to-Income Ratio?
When a Florida homebuyer applies for a mortgage, the lender's primary concern is whether the borrower can afford the monthly payment. The debt-to-income ratio (DTI) measures exactly that. It compares the borrower's total monthly debt obligations to their gross monthly income.
The formula is: DTI = Total Monthly Debt Payments ÷ Gross Monthly Income × 100
The Two DTI Ratios
- Front-End DTI (Housing Ratio) — Includes only housing-related costs: mortgage payment (principal + interest), property taxes, homeowner's insurance, and HOA/condo assessments. Most lenders require the front-end DTI to be 28% or less.
- Back-End DTI (Total Debt Ratio) — Includes ALL monthly debt: housing costs PLUS car payments, student loans, credit card minimums, personal loans, child support, and alimony. Most conventional lenders require the back-end DTI to be 36% to 43% or less.
Example Calculation
A Florida borrower earns $10,000/month gross income. Their monthly debts:
- Proposed mortgage payment: $2,000
- Property taxes and insurance: $500
- Car payment: $400
- Student loans: $300
- Credit card minimums: $200
Front-end DTI: ($2,000 + $500) ÷ $10,000 = 25% ✅
Back-end DTI: ($2,000 + $500 + $400 + $300 + $200) ÷ $10,000 = 34% ✅
DTI vs. DSCR
DTI measures the borrower's personal financial capacity. The Debt Service Coverage Ratio (DSCR) measures the property's income capacity. Residential homebuyers use DTI; commercial investors use DSCR.
Related Terms
- Mortgage — The loan whose qualification requires DTI analysis
- DSCR — The property-based alternative to borrower-based DTI
- Appraisal — Another lender requirement alongside DTI
Barnes Walker Real Estate Finance
Barnes Walker's real estate attorneys advise Florida homebuyers and investors on mortgage qualification strategies, structuring transactions to optimize debt-to-income ratios and ensure timely loan approval. Request a legal inquiry for assistance.
Reviewed by the attorneys at Barnes Walker, Goethe, Shea & Robinson, PLLC