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Debt-to-Income Ratio Calculator

Your debt-to-income ratio (DTI) compares your recurring monthly debt payments with your gross monthly income, which generally means income before taxes and other deductions. Lenders use DTI as one factor when evaluating whether a borrower can manage an additional monthly payment.

For example, if your gross monthly income is $8,000 and your recurring monthly debt payments total $3,000, your DTI is 37.5%.

A practical DTI estimate starts with recurring obligations such as housing, auto loans, student loans, credit card minimum payments, personal loans, leases, and other recurring monthly debt payments. Mortgage underwriting can use more specific definitions for qualifying housing payments and other liabilities, so a lender’s final DTI may differ from a personal estimate.

Credit cards are an especially common source of confusion. For a DTI estimate, the relevant figure is generally the required monthly payment, not your entire outstanding card balance.

Instead of only showing your current percentage, this calculator lets you enter a target DTI and reverse the formula. The result estimates the maximum total monthly debt that fits that target:

If your current debt is higher than that amount, the calculator shows the monthly debt reduction needed to reach the target. If your current debt is lower, it shows the remaining monthly debt room. It also estimates the maximum housing payment that would fit the target if your non-housing debt stayed unchanged.

With $8,000 of gross monthly income and $3,000 of monthly debt, DTI is 37.5%. At a target DTI of 35%, maximum monthly debt would be $2,800, meaning monthly debt would need to decrease by $200 to reach that target, assuming income stays the same.

There is no single DTI cutoff that applies to every loan. The Consumer Financial Protection Bureau notes that different lenders and loan products can have different DTI limits. For conventional mortgage context, Fannie Mae’s current Selling Guide states that manually underwritten loans generally use a 36% maximum total DTI, with certain cases allowed up to 45% when specified credit-score and reserve requirements are met. Loan casefiles underwritten through Desktop Underwriter can have a maximum allowable DTI of 50%.

Those percentages are underwriting rules for particular mortgage scenarios, not universal personal-finance targets. Your credit profile, reserves, loan type, property expenses, interest rate, income stability, and lender rules can all affect qualification.

Total DTI includes housing plus other recurring debt. A housing-to-income ratio looks only at the housing payment compared with gross income. This calculator shows both so you can see whether housing or non-housing debt is contributing more to the total ratio.

Mathematically, DTI falls when recurring monthly debt payments decrease, gross monthly income increases, or both. Paying off an installment loan, reducing required revolving-debt payments, avoiding new monthly obligations, or increasing qualifying income can change the ratio. The most useful strategy depends on the loan rules and your broader budget, so DTI should not be treated as the only measure of affordability.