How to Calculate Your Debt-to-Income Ratio (DTI) — Complete 2026 Guide
Your debt-to-income ratio is one of the most important numbers lenders check before approving a mortgage, car loan, or personal loan. This guide shows you the exact formula, real examples, what counts as a good DTI, and how to lower yours fast.
Before calculating DTI, use our mortgage calculator to see what your monthly payment would be — then plug it into the DTI formula below.
Open Mortgage Calculator →What Is Debt-to-Income Ratio (DTI)?
Your debt-to-income ratio compares your total monthly debt payments to your gross monthly income. It tells lenders whether you can handle new debt without financial strain.
DTI is expressed as a percentage. A DTI of 30% means 30 cents of every dollar you earn goes toward debt. Lower is better.
Mortgage lenders use two versions:
- Front-end DTI (housing ratio): Only your housing costs — mortgage principal, interest, taxes, insurance
- Back-end DTI (total DTI): All monthly debts — housing plus car loans, student loans, credit cards, personal loans
When people say "DTI," they almost always mean the back-end total ratio.
The DTI Formula — Step by Step
Step 1 — Add Up All Monthly Debt Payments
Include every recurring debt you pay each month:
- Mortgage or rent payment
- Car loan payments
- Student loan minimum payments
- Credit card minimum payments (not the full balance)
- Personal loan payments
- Child support or alimony
Do NOT include: utilities, groceries, insurance premiums, gym memberships, or subscriptions — these are not debt.
Step 2 — Find Your Gross Monthly Income
Use pre-tax income. If salaried, divide annual salary by 12. Include all documentable income sources: wages, freelance, rental income, social security.
Step 3 — Divide and Multiply
Example: Sarah earns $6,000/month and has these monthly debts:
| Debt | Monthly Payment |
|---|---|
| Mortgage | $1,400 |
| Car loan | $350 |
| Student loans | $200 |
| Credit card minimum | $75 |
| Total | $2,025 |
Sarah's DTI = ($2,025 ÷ $6,000) × 100 = 33.75% — a healthy, approvable ratio.
What Is a Good Debt-to-Income Ratio in 2026?
| DTI Range | Rating | What It Means |
|---|---|---|
| Below 20% | Excellent ✓ | Best rates and easiest approval |
| 20%–35% | Good | Strong candidate, competitive rates |
| 36%–43% | Acceptable | Approvable but may face conditions |
| 44%–50% | High | Difficult — limited loan options |
| Above 50% | Very High | Most lenders will decline |
DTI Requirements by Loan Type
- Conventional mortgage: Max 43% (some allow 45–50% with high credit score)
- FHA loan: Up to 43% standard; up to 50% with compensating factors
- VA loan: Prefers under 41%; no hard cap but residual income rules apply
- USDA loan: Generally 41% maximum
- Personal loans: Most lenders prefer under 40%
- Auto loans: Typically prefer under 50% total DTI
Quick Reference: Max Monthly Debt by Income
| Annual Income | Gross Monthly | 43% DTI Limit | 36% (Preferred) |
|---|---|---|---|
| $40,000 | $3,333 | $1,433/mo | $1,200/mo |
| $60,000 | $5,000 | $2,150/mo | $1,800/mo |
| $80,000 | $6,667 | $2,867/mo | $2,400/mo |
| $100,000 | $8,333 | $3,583/mo | $3,000/mo |
| $120,000 | $10,000 | $4,300/mo | $3,600/mo |
Does DTI Affect Your Credit Score?
No — DTI is not part of your credit score. FICO and VantageScore do not use income or DTI. However, high credit card balances raise your credit utilization ratio, which does affect your score. Paying down debt improves both your DTI and credit score simultaneously.
See our guide on what credit score you need to buy a house for how the two relate.
How to Lower Your DTI Fast
- Pay off small debts entirely — eliminating a $300/month car payment drops your DTI immediately
- Don't take on new debt — avoid new cards or loans before applying for a mortgage
- Increase income — a raise or side income directly lowers your DTI ratio
- Refinance high-payment loans — lower monthly payments even if the balance stays the same
- Add a co-borrower — a spouse with income but few debts can lower the combined DTI
For eliminating credit card debt fast, see our credit card payoff guide.
Use our mortgage calculator to estimate your payment, then calculate your projected DTI before you apply.
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