DTI Calculator - Debt-to-Income Ratio for Mortgage Approval

What Are the Formulas for Calculating DTI?

Front-End DTI Ratio (Housing Ratio)

Front-End DTI = (Monthly Housing Expenses ÷ Gross Monthly Income) × 100

Where Monthly Housing Expenses include:

• Principal and Interest (P&I)
• Property Taxes
• Homeowners Insurance
• Private Mortgage Insurance (PMI)
• HOA Fees
• Rent (if applicable)

Back-End DTI Ratio (Total Debt Ratio)

Back-End DTI = (Total Monthly Debt Payments ÷ Gross Monthly Income) × 100

Where Total Monthly Debt Payments include:

• All housing expenses (from front-end calculation)
• Minimum credit card payments
• Auto loan payments
• Student loan payments
• Personal loan payments
• Child support/alimony payments
• Other recurring debt obligations

If I Make $72,000 a Year, With $1,500 in Monthly Housing Expenses and $450 in Other Debts, Is My DTI Healthy?

Very healthy! Your front-end DTI ratio is 22.50% and your back-end DTI ratio is 29.25%.

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