Debt to Income Ratio Calculator
Calculate front-end and back-end DTI ratios to assess loan eligibility
Income Details
Gross income is pre-tax earnings before deductions
Monthly Debt Payments
Include personal loans, alimony, child support, etc.
How to Use This Tool
Enter your gross monthly income, or select "Annual" to automatically convert your yearly earnings to monthly. Gross income is your pre-tax pay before any deductions for taxes, insurance, or retirement contributions.
List all recurring monthly debt payments in the corresponding fields. Include mortgage or rent, car loans, student loans, minimum credit card payments, and any other fixed monthly debt obligations like personal loans or alimony.
Click "Calculate DTI" to generate your front-end and back-end debt to income ratios. Use the "Reset" button to clear all fields and start over. You can copy your full results to your clipboard using the copy button in the results section.
Formula and Logic
Debt to Income (DTI) ratio measures the percentage of your gross monthly income that goes toward debt payments. Lenders use two main DTI calculations:
- Front-End DTI: (Monthly Housing Debt / Gross Monthly Income) × 100. This only includes mortgage or rent payments.
- Back-End DTI: (Total Monthly Debt Payments / Gross Monthly Income) × 100. This includes all recurring debt obligations.
For example: If your gross monthly income is $5,000, your mortgage is $1,500, and you have $500 in other monthly debt payments, your back-end DTI is (2000 / 5000) × 100 = 40%, and front-end DTI is (1500 / 5000) × 100 = 30%.
Practical Notes
Most mortgage lenders prefer a back-end DTI below 43%, with 36% or lower considered excellent for the best loan terms. Front-end DTI is typically capped at 28-31% for most housing loans.
Only include recurring monthly debt payments, not variable expenses like utilities, groceries, or entertainment. Do not include expenses paid with credit cards unless you carry a balance and pay a monthly minimum.
If you are self-employed, use your net business income plus any other taxable income as your gross monthly income. Lenders may require 1-2 years of tax returns to verify self-employment income.
Reducing high-interest debt like credit cards first can lower your DTI faster, as these often have higher minimum payments relative to the balance.
Why This Tool Is Useful
DTI is one of the most important factors lenders use to approve mortgage, auto, and personal loan applications. This tool lets you check your DTI before applying for credit, so you can address high debt levels beforehand.
Financial planners use DTI to help clients adjust budgets and prioritize debt repayment. Individuals can track DTI over time to measure progress toward debt reduction goals.
Unlike simple DTI calculators, this tool separates housing and total debt to give a fuller picture of your debt burden, aligning with how most lenders evaluate applications.
Frequently Asked Questions
What is a good DTI ratio for a mortgage?
Most conventional mortgage lenders prefer a back-end DTI below 43%, with 36% or lower qualifying for the most competitive interest rates. Government-backed FHA loans may allow DTIs up to 50% for borrowers with strong credit scores.
Does my spouse's debt count toward my DTI?
If you apply for a joint loan, both you and your spouse's income and debt are included in the DTI calculation. For individual loan applications, only your own income and debt are used, even if you are married.
Do student loan payments count in DTI if they are in deferment?
Yes, most lenders will use 1% of the total deferred student loan balance as a monthly debt payment for DTI calculations, even if you are not currently making payments. Check with your specific lender for their deferment policy.
Additional Guidance
If your DTI is above 43%, focus on paying down high-interest, low-balance debts first to reduce your total monthly debt payments quickly. Increasing your income through a side job or raise will also lower your DTI ratio.
Before applying for a major loan, check your credit report for errors that may be affecting your credit score, as higher scores can offset slightly higher DTI ratios with some lenders.
Recalculate your DTI every 3-6 months as your income or debt payments change, to stay on top of your financial health and loan eligibility.