What Is a Good Debt-to-Income Ratio? A Lender's Perspective
Before a lender looks at your credit score, they look at your DTI. Here's how it's calculated, what thresholds matter for mortgage approval, and how to improve yours before you apply.
If you're planning to apply for a mortgage, auto loan, or any significant line of credit, your debt-to-income ratio (DTI) is one of the first numbers a lender will calculate — often before they even pull your credit score. Understanding it can help you prepare and negotiate from a position of strength.
What DTI Actually Measures
Your DTI compares how much you owe every month against how much you earn every month. It's a simple percentage: total monthly debt payments divided by total monthly gross (pre-tax) income. It answers a lender's core question: "if I approve this loan, will this person still be able to comfortably make all their required payments?"
The Thresholds That Matter
Most conventional mortgage lenders use these rough bands:
- **≤ 20%**: Excellent — lenders are very comfortable
- **20-36%**: Good — well within standard guidelines
- **36-43%**: Fair — the maximum most conventional mortgages will allow
- **43-50%**: Poor — you may still qualify for an FHA loan, but your options narrow significantly
- **50%+**: Critical — most lenders will decline new credit at this level
What Counts as "Debt" in the Calculation
This trips people up constantly. Your DTI calculation includes:
- Your current rent or mortgage payment
- Auto loan payments
- Student loan payments
- Minimum credit card payments (even if you pay your balance in full every month)
- Personal loan payments and any other recurring debt obligation
It does **not** include everyday living expenses like groceries, utilities, insurance premiums, or subscriptions — those matter for your personal budget, but not for a lender's DTI calculation.
Two Common Mistakes
1. **Excluding rent because "it's not technically a loan."** Lenders count your current housing payment because it's a large, recurring financial obligation — leaving it out understates your real DTI and gives you a false sense of security. 2. **Using take-home (net) pay instead of gross.** Lenders always calculate DTI using gross income. Using net pay makes your ratio look artificially high and won't match what a lender actually sees.
How to Improve Your DTI Before Applying
- Pay down or pay off a smaller debt entirely (eliminating a whole line item helps more than making a slightly bigger dent in a larger balance)
- Avoid taking on new debt (a new car loan right before a mortgage application is a classic mistake)
- Increase your income, if possible, through a raise, side income, or adding a co-borrower
Worked Example
Gross monthly income: $6,500. Monthly debts: mortgage/rent $1,400 + car $350 + student loan $200 + credit card minimum $75 = $2,025.
**DTI = $2,025 / $6,500 × 100 = 31.2%** — rated "Good," comfortably within conventional mortgage guidelines.
Try the calculator
List your income sources and debt payments to instantly see your DTI ratio and how it compares to standard lender thresholds with our Debt-to-Income Calculator.
Try the calculator
Calculate your debt-to-income (DTI) ratio instantly. Find out if you qualify for a mortgage and see how lenders evaluate your financial health.