Debt-to-Income Ratio Calculator
Calculate your debt-to-income (DTI) ratio from monthly debt payments and gross income, with lender guidance.
Excellent (≤20%)
Your DTI of 20% falls in the "Excellent" range — most mortgage lenders want it at or below 36–43%.
- Lender ViewExcellent
Most mortgage lenders want DTI at or below 36–43%, depending on the loan program.
About the Debt-to-Income Ratio Calculator
Debt-to-income ratio is one number, but it's the number that decides whether a mortgage lender says yes or no before they even look at your credit score in detail — it measures how much of your gross income is already committed to debt payments, leaving lenders a picture of how much room you actually have for a new payment. This calculator computes your DTI and tells you where it falls against the thresholds lenders actually use.
It's for anyone preparing to apply for a mortgage, auto loan, or any other major financing — a way to see your DTI the way an underwriter will, before it shows up as a surprise on a loan application.
Your income and debt numbers are personal enough that most people would rather check this privately before a lender's pre-qualification form asks for them — this calculator runs entirely in your browser.
Frequently asked questions
What's the difference between front-end and back-end DTI?
Front-end DTI only counts housing costs (the mortgage payment itself) against income; back-end DTI, which this calculator computes, counts all monthly debt payments — housing, car loans, student loans, credit cards, and more. Mortgage lenders typically look at both, but back-end DTI is usually the harder threshold to clear.
What DTI do I need to qualify for a mortgage?
Most conventional lenders prefer back-end DTI at or below 36%, though many will approve up to 43-45% with strong credit and compensating factors, and some government-backed loan programs allow more. There's no single universal cutoff — it varies by lender and loan type.
Does DTI include the new mortgage payment I'm applying for?
When a lender calculates your DTI for a mortgage application, yes — they add the proposed new mortgage payment into your total monthly debts. This calculator lets you do the same by entering your current debts plus an estimated new payment to see where you'd land.
Can I lower my DTI quickly before applying for a loan?
Paying down or paying off a revolving debt like a credit card balance is usually the fastest lever, since it removes that minimum payment from your total immediately. Increasing income moves the ratio too, but obviously on a much longer timeline than debt payoff.
Does my DTI ratio affect my credit score?
No — DTI isn't a factor in your credit score itself, which is based on your credit report data like payment history and credit utilization. DTI is a separate metric lenders calculate manually from your income and debts specifically to judge how much new debt you can reasonably take on.
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