Overview
Debt-to-income ratio is one of the most important numbers in personal finance, yet it generates dozens of persistent questions. This FAQ covers every common DTI question with specific, current answers for 2025.
Common DTI questions and quick answers
| Common Question | Quick Answer |
|---|---|
| What counts as debt for DTI? | Only minimum required monthly payments on loans and credit cards -- not utilities, insurance, or subscriptions |
| Does rent count in DTI? | For renters: current rent typically not counted in pre-qualification; proposed new housing payment is used |
| How is part-time income counted? | 2-year history required; averaged over 24 months for consistency |
| Does DTI include medical debt? | Only if it appears on your credit report as an active account with monthly obligations |
| Can I get a mortgage with 50% DTI? | Some FHA and non-QM loans allow up to 50-57% with strong compensating factors |
| What DTI is best for home buying? | Under 36% back-end for conventional; the lower the better for rates and terms |
Lenders calculate DTI based on your current income and debt payments at the time of application -- not future projections. A pending raise or an about-to-be-paid-off car loan is not counted. Complete significant debt payoffs before applying to benefit from the immediate DTI improvement.
Key Points
- Alimony and child support paid are included as monthly debt obligations in DTI
- Alimony and child support received are included as income in DTI calculations
- Co-signing a loan makes you responsible for that payment in DTI even if the primary borrower pays
- 401(k) loans appear in DTI calculations if they show up as payroll deductions
- Lease payments on vehicles or equipment are included as monthly obligations
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Debt-to-Income Ratio FAQ: Every Common Question Answered
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