Debt-to-Income (DTI) Ratio Calculator (2026)

Most lenders prefer a back-end DTI of 36% or lower; 43% is the typical maximum for a Qualified Mortgage. Under 36% is healthy, 36-43% is manageable, and above 43% makes new credit harder to obtain — though some borrowers with strong credit and reserves can still qualify above that threshold.

Front-end DTI counts only housing costs against gross income (lenders often want ≤28%). Back-end DTI adds all other debt payments — the figure lenders weigh most, with 36-43% as the common ceiling.

Mortgage/rent, minimum credit card payments, auto loans, student loans, personal loans, and court-ordered payments like child support. Exclude utilities, groceries, insurance, taxes withheld, and discretionary spending like streaming subscriptions.

Gross income — your pay before taxes and deductions. A $90,000 salary is $7,500 gross per month.

You can lower DTI two ways: pay down or pay off existing debts to reduce the numerator, or increase your gross income to grow the denominator. Paying off a credit card or auto loan entirely tends to have the biggest immediate impact, since it removes that full monthly payment from the calculation rather than just reducing it.

No — DTI is not a factor in your credit score, which is calculated from your credit report by the credit bureaus. However, lenders check DTI separately during underwriting, alongside your credit score, to assess whether you can afford a new monthly payment on top of your existing obligations.

Most conventional lenders want a back-end DTI of 36% or lower, though some loan programs allow up to 43%–50% with compensating factors like a strong credit score, large down payment, or significant cash reserves. FHA loans are often more flexible on DTI than conventional loans, while jumbo loans tend to have stricter limits. Checking your DTI before shopping for a mortgage can help set realistic expectations for how much home you'll qualify for.

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The arithmetic follows the formula and assumptions documented on this page. The result is still an estimate because actual rates, fees, taxes, timing conventions, eligibility rules, and provider calculations can differ. Use figures from your official quote, statement, contract, or tax form before making a financial decision.

Rate, time, starting balance, recurring payments or contributions, and fees usually have the largest effects. Change one input at a time to create a conservative, expected, and optimistic scenario instead of relying on a single forecast.

Only when they appear as an input or are explicitly described in the methodology. Do not assume an omitted cost is zero. Review the formula and methodology sections to see exactly what is included before comparing the result with an outside quote.

No. A calculator projects the assumptions entered; it cannot predict market returns, inflation, variable interest rates, tax-law changes, or provider decisions. Rerun the calculation with several assumptions to understand the range of possible outcomes.

Professional systems may use daily timing, transaction dates, compounding conventions, rounding rules, account-specific fees, credits, eligibility details, or regulations that a general-purpose calculator cannot know. A small difference can be rounding; a large difference usually means an assumption or included cost is different.