Debt-to-Income (DTI) Ratio Calculator
Calculate your front-end and back-end DTI ratios instantly. See how you compare to lender thresholds for conventional, FHA, VA, and USDA loans.
Know Where You Stand
Enter your income and monthly debt payments to see your DTI ratios and how they compare to lender thresholds.
Understanding Your Debt-to-Income Ratio
What Is DTI?
Debt-to-income ratio (DTI) is the percentage of your gross monthly income that goes toward paying monthly debts. Lenders use it as a primary underwriting criterion because it directly measures whether you can afford a new payment. There are two versions: the front-end ratio (housing costs only) and the back-end ratio (all debts combined). Lenders typically look at both, but the back-end ratio carries more weight.
Why Lenders Care About DTI
Statistical default analysis shows a clear correlation between high DTI and mortgage default rates. Borrowers with DTIs over 43% default at measurably higher rates than those under 36%. Lenders price this risk — either by declining the loan or charging a higher rate. DTI also acts as a guardrail for the borrower: high debt relative to income leaves little cushion for unexpected expenses, job loss, or rate increases on variable-rate products.
How to Improve Your DTI
Reduce Debts
- Pay off or pay down credit cards before applying
- Eliminate small loans (personal loans, store cards)
- Avoid taking on new debt in the 6 months before applying
- Refinance student loans to lower payments
Increase Income
- Document all income sources (bonuses, freelance, rental)
- Wait until after a raise or promotion to apply
- Apply jointly with a co-borrower to combine incomes
- Build a documented 2-year history of side income
How DTI Affects Your Interest Rate
In some loan programs, high DTI can trigger risk-based pricing adjustments — meaning a higher rate — even if you’re approved. Conventional loans use a Loan-Level Price Adjustment (LLPA) grid that can add costs at higher DTIs. The combination of high DTI and a lower credit score is particularly expensive. Improving both before applying can save tens of thousands over the life of a loan.
DTI Quick Reference
Excellent
Under 28/36%
Good
28–36/36–43%
Acceptable
36–45/43–50%
Difficult
Over 45/50%
Front-end / back-end thresholds