Back-End DTI Calculator

Enter your monthly housing payment, other debt payments and gross monthly income to calculate your back-end debt-to-income ratio.

Back-End DTI Calculator

Calculate the back-end DTI ratio — the share of gross income going toward all debts, including housing.

This calculator provides an estimate for general informational purposes only. It is not a substitute for professional financial, mechanical or engineering advice.

Back-end DTI adds housing costs to every other recurring debt payment and compares the total to gross income, giving lenders the fuller picture of how much of your income is already committed.

Example

  • With the default values shown above, this calculator returns: Total Monthly Debt Payments ≈ USD 2,400.00; Back-End DTI Ratio ≈ 40.00.

Frequently Asked Questions

What is the formula?

Back-End DTI % = (Monthly Housing Payment + All Other Monthly Debts) ÷ Gross Monthly Income × 100.

What's a typical maximum?

Many mortgage lenders cap back-end DTI around 36–43%, though this varies by loan program and lender.

Related Calculators

Front-End DTI CalculatorCalculate the front-end DTI ratio — the share of gross income going toward housing costs alone.Debt-to-Income Ratio CalculatorCalculate your debt-to-income (DTI) ratio from your monthly debt payments and gross income.Home Affordability CalculatorEstimate the maximum home price you can afford based on your income, debts, down payment and a target debt-to-income ratio.
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