Debt-to-Income Ratio Calculator (Detailed)

Calculate front-end and back-end DTI with mortgage qualification thresholds.
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Use the Debt-to-Income Ratio Calculator (Detailed) above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

The Debt-to-Income (DTI) Ratio Calculator is a crucial tool that helps you understand the percentage of your gross monthly income that goes towards paying your monthly debt obligations. Lenders use this ratio to assess your ability to manage monthly payments and repay borrowed money, making it a key factor in loan approvals and interest rates.

This detailed calculator determines your DTI by summing up all your recurring monthly debt payments (e.g., credit card minimums, loan payments, alimony) and dividing that total by your gross monthly income (income before taxes and deductions). The result is then multiplied by 100 to express it as a percentage.

A common mistake is including non-debt expenses like utilities or groceries; DTI only considers recurring debt payments. Also, ensure you use your gross income, not net income, as lenders evaluate your income before deductions. Aim for a DTI below 36% for most conventional loans, with 43% often being the maximum for mortgage qualification.

Example: Maria's Loan Application with $

  1. 1 Maria earns a gross monthly salary of $5,000. Her monthly debt payments include a $1,200 mortgage payment, a $300 car loan payment, and a $100 minimum credit card payment.
  2. 2 First, sum Maria's monthly debt payments: $1,200 (mortgage) + $300 (car loan) + $100 (credit card) = $1,600. Next, divide her total debt by her gross monthly income: $1,600 / $5,000 = 0.32. Finally, multiply by 100 to get the percentage: 0.32 * 100 = 32%.
  3. 3 Maria's Debt-to-Income Ratio is 32%.
  4. 4 A DTI of 32% is generally considered good by lenders. This indicates Maria has sufficient income to comfortably manage her existing debt obligations and would likely be viewed favorably for new loan applications, such as refinancing or another significant purchase.

Source: CFPB — Consumer Tools · Last updated: April 2026

Frequently Asked Questions

What DTI ratio do mortgage lenders require for approval?
For mortgage qualification, lenders prefer a front-end DTI (housing costs only) under 28% and a back-end DTI (all debt payments) under 36%. FHA loans allow up to 43%, and some lenders go to 50% with strong compensating factors. Below 20% is considered excellent.
What DTI ratio do mortgage lenders require for approval? (2)
Add up all monthly debt payments (mortgage/rent, car loans, student loans, credit card minimums, alimony) and divide by your gross monthly income. If your debts total $2,000/month and your gross income is $6,000/month, your DTI is 33%.
Does rent count in debt-to-income ratio for a mortgage?
If you are applying for a mortgage to buy a home, your current rent is replaced by the projected mortgage payment in the calculation. If you are keeping a rental property, that rent payment does count. The lender calculates DTI using the new housing payment, not your current rent.

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