Calculate Your Mortgage Debt-to-Income Ratio (DTI)
Find out where you stand before applying for a mortgage. Calculate your front-end and back-end debt-to-income ratio in minutes.
Getting approved for a mortgage comes down to one of the most important numbers lenders evaluate: your Debt-to-Income (DTI) ratio.
Your DTI compares your gross monthly income to your monthly financial obligations, helping determine whether your budget can comfortably support a new mortgage payment.
Our free DTI Calculator estimates both your Front-End DTI (housing expenses only) and your Back-End DTI (housing expenses plus your recurring monthly debts). Simply enter your income, proposed housing costs, and monthly debt payments to instantly calculate your ratios.
While this calculator is a great planning tool, remember that a mortgage approval depends on more than your DTI alone. Credit score, loan program, assets, employment history, and other underwriting factors all play an important role.
How to Use This DTI Calculator
You only need three pieces of information:
1. Your Gross Monthly Income
Enter your income using whichever method best fits your situation. You can calculate your income from an annual salary, hourly wage, or self-employed income. The calculator automatically converts everything into a gross monthly income.
2. Your Proposed Monthly Housing Payment
Next, enter the expected monthly costs of the home you’re considering.
Include:
- Principal & Interest
- Property Taxes
- Homeowners Insurance
- Mortgage Insurance (PMI or FHA Mortgage Insurance)
- HOA Dues (if applicable)
Together these create your total monthly housing expense, which lenders use to calculate your Front-End DTI.
3. Your Monthly Debt Payments
Finally, enter the minimum monthly payments for your recurring debts. You can add as many debts as you need to in this dynamic field by clicking “Add.”
Examples include:
- Car loans
- Student loans
- Credit cards
- Personal loans
- HELOCs
- Installment loans
- Any other recurring monthly obligation appearing on your credit report
The calculator automatically totals these payments to determine your Back-End Debt-to-Income Ratio.
Understanding Your Results
After completing the calculator, you’ll receive two important numbers.
Front-End DTI
Your Front-End Debt-to-Income Ratio compares your proposed monthly housing payment to your gross monthly income.
This ratio helps lenders evaluate whether your new mortgage payment fits comfortably within your budget.
Back-End DTI
Your Back-End Debt-to-Income Ratio compares all of your monthly debt obligations to your gross monthly income.
This includes your proposed mortgage payment plus recurring debts like car loans, student loans, credit cards, personal loans, and other minimum monthly payments.
For most mortgage programs, this is the ratio lenders rely on most heavily during underwriting.
Your DTI Is Only Part of the Picture
A low Debt-to-Income Ratio doesn’t automatically guarantee mortgage approval—and a higher DTI doesn’t always prevent one.
Different loan programs evaluate DTI differently.
- VA loans focus heavily on residual income rather than a strict maximum DTI.
- FHA loans often allow higher DTIs than conventional financing.
- Conventional loans generally have stricter DTI limits.
- USDA loans typically have the most conservative DTI requirements.
Your credit score, assets, employment history, reserves, and compensating factors all influence your final approval.
That’s why this calculator is designed as a planning tool—not a loan approval.
Pro Tip: If you are purchasing a home from a family member, you may not need a massive cash savings pool to offset your debts. You can structure the purchase using our custom Gift of Equity Calculator to completely eliminate your out-of-pocket down payment requirements.
Ready to Find Out What You Actually Qualify For?
This calculator estimates your Debt-to-Income Ratio using the information you provide.
A mortgage preapproval goes one step further by reviewing your complete financial profile to determine your actual buying power.
If you’re planning to buy a home in Kentucky, Indiana, Florida, or Minnesota, we’d be happy to help you understand your options before you start shopping.
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