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Debt-to-Income Ratio CalculatorFree online financial calculator — instant results, no sign-up

Measure your monthly debt payments against your gross income.

Inputs

$
$
$
Front-end DTI
26.67%
Back-end DTI36.67%
RatingAcceptable

Estimates only, based on the inputs and assumptions shown. This is not financial, investment, tax, or legal advice. Prices, rates and local rules may change; crypto scenarios do not predict returns. Confirm important decisions with a qualified professional.

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About the Debt-to-Income Ratio Calculator

This calculator computes your front-end and back-end debt-to-income (DTI) ratios by comparing your monthly debt obligations against your gross monthly income. Mortgage lenders, auto lenders, and financial planners use these ratios to evaluate your ability to manage monthly payments and take on new debt.

Monthly gross income
Total pre-tax income earned each month across all sources (wages, bonuses, pensions, etc.), in dollars (typically $1,000 to $50,000+).
Housing payment
Your total monthly housing obligation, including rent or mortgage principal, interest, taxes, and insurance (PITI), in dollars.
Other debt payments
Sum of all non-housing recurring debt minimum payments, such as auto loans, student loans, minimum credit card payments, and personal loans, in dollars.

Formula and method

Front-End DTI = (Housing Payment / Gross Income) × 100
Back-End DTI = ((Housing Payment + Other Debt Payments) / Gross Income) × 100
  • Housing PaymentMonthly housing expense (rent or mortgage, taxes, and insurance)
  • Other Debt PaymentsTotal monthly non-housing debt obligations
  • Gross IncomeTotal monthly pre-tax income

The tool divides monthly housing expenses by gross income to compute the front-end DTI percentage. It then adds housing and other monthly debt payments together and divides by gross income to compute the back-end DTI percentage. The rating is classified as 'Good' if the back-end DTI is 36% or less, 'Acceptable' if between 36.01% and 43%, and 'High' if above 43%.

Worked example

These are the calculator's starting values and the results it actually produces for them.

Inputs

  • Monthly gross income6000 $
  • Housing payment1600 $
  • Other debt payments600 $

Results

  • Front-end DTI26.67%
  • Back-end DTI36.67%
  • RatingAcceptable

How to use the Debt-to-Income Ratio Calculator

  1. 1Enter your total pre-tax monthly income in the Monthly gross income field.
  2. 2Input your monthly rent or total mortgage payment (including property taxes and homeowners insurance).
  3. 3Enter the sum of your minimum monthly payments for auto loans, student loans, credit cards, and other debts.
  4. 4Review your Front-end DTI, Back-end DTI, and the resulting financial rating.

Reading your result

A lower ratio indicates more financial breathing room and lower risk for lenders. A back-end DTI of 36% or lower ('Good') generally qualifies for the most favorable loan terms, while 37% to 43% ('Acceptable') is the standard upper limit for many conventional qualified mortgages. A ratio above 43% ('High') may restrict your borrowing options or require compensating factors like high credit scores or significant cash reserves.

Limitations

The calculator only evaluates fixed debt obligations and does not account for essential everyday expenses like food, utilities, medical care, or income taxes. It also does not factor in credit scores, loan type exemptions (like FHA loans that allow higher DTIs), or variations in irregular income.

Common questions

What is the difference between front-end and back-end DTI?+

Front-end DTI only considers housing-related costs (mortgage/rent, property taxes, insurance) relative to your gross income. Back-end DTI includes housing plus all other recurring debt payments, such as student loans, car payments, and minimum credit card amounts.

Should I use gross income or take-home pay?+

Lenders standardly use pre-tax gross income to calculate DTI ratios, so this calculator requires your gross monthly earnings before taxes and deductions are taken out.

Why is 43% a common threshold for back-end DTI?+

Under Consumer Financial Protection Bureau (CFPB) rules for Qualified Mortgages, 43% has historically served as the general ceiling for a borrower to demonstrate a reasonable ability to repay a conventional mortgage.

Does the calculator save my information?+

Calculations run in your browser. While signed in, inputs and results are automatically recorded in account history; saving a result creates a separate saved record.

Further reading

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Results are estimates for informational purposes and are not financial, medical or legal advice.