DTI calculator
Estimate your debt-to-income ratio before applying for a mortgage, refinancing, or deciding whether another payment fits your monthly budget.
Back-end DTI
0%What it does
The calculator estimates front-end DTI for housing and back-end DTI for all listed monthly debts. It helps you see how much of gross income is already committed before taking on a new loan.
Use it before mortgage shopping, refinancing, buying a car, or consolidating debt. The result is an estimate for planning and should be checked against lender requirements.
How to use it
Enter gross monthly income first. Add the monthly housing payment and recurring debt obligations that appear on credit reports or are required by agreement.
After the ratio appears, lower one payment at a time to see which debt has the biggest effect. This can help prioritize payoff or decide whether a new loan payment fits.
How it works
Debt-to-income ratio compares required monthly debt payments with gross monthly income. A $2,000 total monthly debt payment and $6,000 gross monthly income would create a back-end DTI of about 33.3%.
Front-end DTI looks only at housing costs, while back-end DTI includes housing plus credit card minimums, auto loans, student loans, personal loans, and other required debt. The back-end ratio is usually the broader affordability signal.
What affects it
The biggest drivers are gross income, housing payment, and fixed debt payments. Paying off a credit card, refinancing an auto loan, or choosing a smaller mortgage payment can lower DTI. Higher income can also lower the ratio, even if debt payments stay the same.
DTI does not measure every budget pressure. Child care, groceries, utilities, health costs, irregular income, and emergency savings do not always appear in the ratio, but they still matter when deciding whether a payment is comfortable.
Common mistakes
One common mistake is using take-home pay instead of gross income when trying to mirror lender-style DTI. Another is leaving out required debts because they feel small. Even small monthly payments can move the ratio when income is tight.
Also avoid treating a low DTI as automatic approval or a high DTI as automatic denial. Lenders may weigh credit score, cash reserves, loan type, down payment, employment history, and the specific underwriting rules for the product.
FAQ
Should I use take-home pay? Most lending DTI calculations use gross monthly income, not take-home pay.
Do groceries count as debt? No. DTI focuses on required debt payments, not everyday living expenses.
What is a good DTI? Lower is generally easier to manage, but the right benchmark depends on loan type, lender rules, and the rest of your finances.
Should I include rent? Yes, if you are checking current cash flow. If you are estimating a future mortgage, replace rent with the expected housing payment.