How to use this calculator
Debt-to-income ratio, or DTI, is one of the core ways lenders evaluate a mortgage application. It compares your monthly obligations with your gross monthly income before taxes. The front-end ratio looks only at the proposed housing payment. The back-end ratio includes the housing payment plus recurring debts such as auto loans, student loans, credit card minimum payments, personal loans, and court-ordered support.
DTI does not usually include everyday living costs such as utilities, groceries, streaming subscriptions, gas, or non-housing insurance. Student loans can be more complex because programs may use the payment on the credit report, an income-based repayment amount, or a percentage of the balance when the payment is deferred or not fully amortizing. That is why a calculator is useful for planning, but underwriting still matters.
As a rule of thumb, a back-end DTI below 36% is strong, 36% to 43% is common, 43% to 50% may need stronger compensating factors, and above 50% can be difficult. Ways to improve DTI include paying off small debts, documenting eligible income, choosing a lower price point, or increasing the down payment.
For illustration purposes only. Not a rate quote, loan offer, or commitment to lend. Contact us for a personalized quote.