How to use the debt-to-income ratio calculator
Add the monthly debt obligations you want to evaluate, then divide that total by gross monthly income before taxes and deductions. Multiply by 100 to express the relationship as a percentage.
Lenders can define qualifying debt and income differently, so this calculator is best used as a quick ratio check rather than a loan-approval prediction.
DTI formula
A DTI of 30% means 30 cents of each gross-income dollar is represented by the monthly debt payments included in the calculation. Housing obligations may or may not be included depending on the comparison you are making.
Example: Marcus calculates his DTI
Marcus earns $6,000 a month before tax and has $2,000 in monthly debt payments. His debt-to-income ratio is $2,000 ÷ $6,000 × 100 = 33.33%.
The remaining $4,000 is income before taxes and other expenses, not disposable cash. DTI does not capture groceries, utilities, or every cost a household needs to cover.
Keep income and debts on a monthly basis
Divide annual gross income by 12 before entering it. Add recurring monthly debt payments, rather than the full balances you owe.
For $1,800 of debt payments and $6,000 of gross monthly income, DTI is 30%. That does not account for groceries, utilities or other living costs.
Front-end and back-end debt-to-income ratios
A housing-only ratio compares the monthly housing payment with gross monthly income. A back-end DTI adds the other monthly debt payments. Keep the same monthly income basis when comparing the two.
This tool divides the total monthly debt amount you enter by gross monthly income. It does not classify your expenses or choose a lender's qualifying rules. Include the housing and debt payments appropriate to the comparison you are making.
Assumptions and limitations
What the estimate assumes
Different lenders and loan programs use different underwriting standards and definitions.
Important limitation 2
Living expenses that are not debt payments are not included unless you add them yourself.
Sources and reference material
Debt-to-Income Ratio Calculator FAQs
What income should I use for DTI?
The common DTI definition uses gross monthly income before taxes and deductions. A lender may have specific rules for documenting or averaging income.
What debts count in DTI?
Common examples include monthly payments for housing debt, auto loans, student loans, credit cards, and other recurring debt obligations. The exact underwriting definition depends on the lender and loan program.
Is a lower DTI always better?
A lower ratio means the entered debt payments consume a smaller share of gross income, but lending decisions consider many factors beyond DTI.
Does DTI include groceries and utilities?
Not in the standard formula. DTI is based on debt obligations, not every household expense.
Is rent included in debt-to-income ratio?
Housing obligations can be included in lender-specific DTI calculations, but the exact treatment depends on whether the analysis is for a current budget or a new loan. Follow the lender or program definition for the application you are evaluating.
Does a low DTI guarantee loan approval?
No. Lenders can consider credit history, income stability, down payment, collateral, reserves, loan program rules, and other factors in addition to DTI.
For informational use. Lenders apply their own underwriting rules, documentation standards, and qualifying ratios.