Debt-to-Income (DTI) Ratio Calculator
Calculate your Front-End (housing) and Back-End (total debt) DTI ratios to determine your borrowing capacity. Evaluate your numbers against standard Conventional, FHA, and VA mortgage underwriting benchmarks.
Income & Monthly Debts
DTI Assessment Results
Lending Estimate Notice: Monthly payments, taxes, PMI, and affordability limits are estimates based on standard underwriting conventions. Actual mortgage rates, closing fees, and approval terms vary by lender and borrower credit qualifications.
Understanding Debt-to-Income (DTI) Underwriting Ratios
Your Debt-to-Income (DTI) ratio is one of the most critical metrics used by mortgage lenders, auto finance companies, and personal loan underwriters to assess credit risk. While your credit score indicates your repayment reliability, your DTI ratio measures your cash flow capacity to service new monthly debt payments.
Underwriters divide your DTI into two distinct calculations: the Front-End Ratio (which looks solely at proposed housing expenses) and the Back-End Ratio (which factors in all recurring debt obligations combined).
DTI Limits by Mortgage Loan Program
| Loan Program | Standard Front-End DTI | Standard Back-End DTI | Maximum with Compensating Factors |
|---|---|---|---|
| Conventional (Fannie/Freddie) | 28% | 36% | Up to 45%–50% via Desktop Underwriter (DU) |
| FHA Loan | 31% | 43% | Up to 46.9% / 56.9% with strong cash reserves & high credit |
| VA Loan | None stated | 41% benchmark | Flexible based on meeting minimum Residual Income rules |
| USDA Loan | 29% | 41% | Up to 44% with automated underwriting waiver |
Frequently Asked Questions
Your Debt-to-Income (DTI) ratio compares your total monthly debt payments against your gross monthly income before taxes. Mortgage underwriters and personal loan lenders use DTI as a primary risk indicator to determine whether you can comfortably afford new monthly debt payments.