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Your DTI ratio is one of the most important factors lenders evaluate when you apply for a mortgage. Understanding how it works — and how to improve it — can make the difference between approval and denial.
Key Takeaway
Your debt-to-income ratio (DTI) measures how much of your gross monthly income goes toward debt payments. Most conventional loans require a back-end DTI of 45% or less, while FHA loans allow up to 50%. Lowering your DTI by paying off debts can significantly increase the mortgage amount you qualify for.
DTI compares your monthly debt payments to your gross monthly income. Lenders use two types of DTI to evaluate your mortgage application.
Also called the “housing ratio”
Front-end DTI measures only your housing-related costs as a percentage of your gross monthly income. This includes your mortgage principal, interest, property taxes, and homeowners insurance (PITI), plus any HOA dues or mortgage insurance.
Front-End DTI = Housing Costs ÷ Gross Monthly Income
Also called the “total debt ratio”
Back-end DTI includes all of your monthly debt obligations — housing costs plus car loans, student loans, credit card minimums, child support, and any other recurring debt payments. This is the ratio most lenders focus on.
Back-End DTI = All Monthly Debts ÷ Gross Monthly Income
Follow this example to calculate both your front-end and back-end DTI ratios.
Use your pre-tax income. If your annual salary is $100,000:
$100,000 ÷ 12 = $8,333/month gross income
| Debt Type | Monthly Payment |
|---|---|
| Proposed mortgage (PITI) | $2,000 |
| Auto loan | $400 |
| Student loans | $200 |
| Credit card minimums | $100 |
| Total Monthly Debts | $2,700 |
Front-End DTI
$2,000 ÷ $8,333 = 24.0%
Housing costs only — within the 28% guideline
Back-End DTI
$2,700 ÷ $8,333 = 32.4%
All debts included — well within most loan limits
Maximum DTI ratios vary by loan program. These are general guidelines — your loan officer can help determine your eligibility.
| Loan Program | Max Front-End DTI | Max Back-End DTI | Notes |
|---|---|---|---|
| Conventional | 28% | 45% | Can go to 50% with strong compensating factors |
| FHA | 31% | 43–50% | Up to 57% with compensating factors and AUS approval |
| VA | No limit | 41% | Can exceed with residual income |
| Jumbo | 28% | 43% | Stricter requirements |
| USDA | 29% | 41% | Income limits apply |
| Non-QM | Varies | Up to 55% | Bank statement, DSCR programs |
| DSCR | N/A | N/A | Based on property cash flow, not personal DTI |
Not all monthly expenses are considered debts by mortgage lenders. Here is what is and is not included in your DTI calculation.
If your DTI is too high to qualify, these five strategies can help bring it down before you apply.
Target credit cards and small auto loans. Eliminating a $300/month car payment can reduce your DTI by 3–4 percentage points, potentially unlocking a significantly larger mortgage amount.
Document a side job, pursue overtime, or add a co-borrower. Lenders use your gross monthly income as the denominator, so even a modest income increase can meaningfully lower your ratio.
Do not open new credit cards, finance furniture, or take on any new loans in the months leading up to your mortgage application. Each new payment raises your DTI.
Consolidating or refinancing high-payment debts into longer-term loans with lower monthly payments can reduce your DTI. Just be mindful that extending terms may increase total interest paid.
A bigger down payment means a smaller loan amount and a lower monthly mortgage payment. This directly reduces your front-end DTI and can bring your back-end DTI within qualifying range.
Answers to the most common questions about debt-to-income ratios and mortgage qualification.
Use our mortgage calculators to estimate your DTI, or get pre-qualified to find out exactly how much home you can afford.
This information is not intended to be an indication of loan qualification, loan approval or commitment to lend. Rates, terms, and availability of programs are subject to change without notice.
Reviewed by Joann Ton, Loan Officer (NMLS# 1461031) | Last updated: June 2026