Debt-to-Income Ratio Calculator

• Front-end ratio looks at housing costs alone; back-end ratio adds every other monthly debt payment.
• Most conventional mortgage lenders look for a back-end ratio at or below roughly 43%–45%.
• DTI counts debt payments only — not groceries, utilities or other living expenses.
• Add or remove debts freely; the ratio recalculates as you type.

How to use this calculator

Enter your gross monthly income — before taxes and other deductions — along with your monthly housing payment. If you rent, that's your rent; if you own, it's principal, interest, taxes, insurance and any HOA dues combined. Then list your other monthly debt payments: auto loans, student loans, credit card minimums, personal loans and anything else that recurs every month.

The calculator returns both ratios lenders use. Add or remove debt rows as needed — the "Add another debt" button adds a blank row, and each row can be removed individually.

Front-end vs. back-end DTI

Two different ratios are commonly used, and they answer slightly different questions:

Front-end DTI = monthly housing payment ÷ gross monthly income

Back-end DTI  = (monthly housing payment + all other monthly debt payments) ÷ gross monthly income

Front-end DTI looks only at housing costs relative to income. Back-end DTI is the more complete picture, adding every other recurring debt obligation — and it's generally the number mortgage underwriters weight most heavily once housing costs on their own look reasonable.

A worked example

Someone earning $6,500 a month with an $1,800 housing payment, a $400 auto loan, $250 in student loan payments and $150 in credit card minimums has a front-end ratio of 27.7% ($1,800 ÷ $6,500) and a back-end ratio of 40.0% ($2,600 ÷ $6,500). That back-end ratio sits comfortably inside the range most conventional lenders look for.

What lenders typically look for

These are common guidelines, not universal rules — actual requirements vary by lender, loan program and compensating factors like credit score, down payment size and cash reserves:

• Conventional mortgages commonly look for a back-end ratio at or below roughly 43%–45%, and a front-end ratio at or below roughly 28%.
• FHA loans can sometimes allow higher ratios, particularly with strong compensating factors.
• VA and USDA loans use their own underwriting guidelines that can differ from the conventional rules of thumb above.
• Credit cards, personal loans and auto financing each have their own DTI expectations that tend to be less standardized than mortgage underwriting.

How to lower your DTI

There are only two levers: reduce the monthly debt payments in the numerator, or increase the qualifying income in the denominator. On the debt side, paying down or paying off a balance, refinancing to a lower rate or a longer term, or consolidating several debts into one lower payment (see the Debt Consolidation calculator, when available) all reduce the ratio directly. On the income side, a raise, a second income source, or adding a co-borrower to a loan application can help — though a co-borrower's own debts are typically added into the ratio as well.

Common mistakes

Using net (take-home) income instead of gross. DTI is calculated on gross income, before tax and other withholdings — using net income will understate the true ratio.

Leaving out a debt because it's "almost paid off." Lenders generally count the full minimum payment on any debt with more than about 10 months remaining, regardless of the sentiment attached to it.

Confusing DTI with a budget. A low DTI means debt payments are a manageable share of income — it says nothing about whether the remaining income actually covers everything else in a household's spending.

Frequently asked questions