What is a Debt-to-Income Ratio?
When you're planning to buy a home, lenders evaluate your financial situation to determine your eligibility for a mortgage. One crucial factor they consider is your debt-to-income ratio (DTI) — a metric that compares your monthly debt payments to your gross monthly income, expressed as a percentage.
Mortgage brokers like Contemporary Mortgage Services, Inc. use this number to determine the maximum monthly PITIA (Principal, Interest, Taxes, Insurance, and Association Dues) payment a borrower can qualify for and afford.
How is the DTI Ratio Calculated?
To calculate your DTI, divide your total monthly debt obligations by your gross monthly income and multiply by 100:
DTI Ratio = (Total Monthly Debt ÷ Gross Monthly Income) × 100
A lower DTI generally indicates lower risk for lenders — meaning more of your income is available to meet financial obligations. A higher DTI suggests more debt relative to income, which may raise concerns.
What is an Acceptable DTI Ratio?
Most lenders prefer a DTI ratio of 43% or lower, though this varies by loan type. There are two types of DTI ratios lenders evaluate:
Front-End DTI
Measures housing-related expenses only (mortgage payment, property taxes, insurance) against your gross income. Ideally 30% or lower.
Back-End DTI
Includes all monthly debt obligations including housing expenses. Most lenders prefer 45% or lower — though FHA and VA loans typically allow higher.
Example DTI Calculation
| Total Monthly Debt Payments |
$580 |
| Total Proposed Housing Payment (PITIA) |
$2,000 |
| Total Monthly Gross Income |
$6,000 |
Front-End Ratio: $2,000 ÷ $6,000 = 0.3333 × 100 = 33.33%
Back-End Ratio: ($580 + $2,000) ÷ $6,000 = 0.43 × 100 = 43.00%
In this example, keeping the proposed housing payment (PITIA) at or under $2,000/month keeps the back-end ratio at or under 43%.
NOTE: You can still qualify for a mortgage with a DTI above 45%. FHA and VA loans typically allow a much higher DTI. Conventional loans may also accept higher DTIs when compensating factors are present.
How to Improve Your DTI Ratio
If your DTI is higher than desired, here are some ways to bring it down:
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Pay down existing debts — Reducing outstanding balances lowers your DTI and increases your chances of qualifying.
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Increase your income — Consider overtime, a second job, or exploring additional income streams.
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Avoid taking on new debts — Minimize new credit applications or large purchases that could increase your debt load.
In Conclusion
Understanding your debt-to-income ratio is essential when applying for a mortgage. Lenders use it to assess your financial stability and ability to handle payments. To improve your DTI, focus on paying down debts, increasing income, and avoiding new obligations.
Keep in mind that DTI ratios are just basic guidelines — many additional factors go into qualifying for a mortgage. At Contemporary Mortgage Services, Inc., we would be happy to calculate your DTI ratios and use that information to pre-qualify you for a mortgage.
Try our free Mortgage Pre-Qualification Calculator to run your own numbers and see where you stand.