Debt-to-Income (DTI) Calculator

What is a good debt-to-income ratio?

Your DTI is the share of your gross monthly income (before tax) that goes to debt payments. Lenders use it to judge how much more you can borrow. General guidance:

• Under 36% — healthy. Most lenders are comfortable here.
• 36%–43% — manageable, but getting tight. 43% is a common ceiling for qualified mortgages.
• Over 43% — high. Borrowing gets harder and rates less favorable.

How this is calculated

DTI = total monthly debt payments ÷ gross monthly income × 100. Include housing (rent or mortgage), car loans, student loans, credit-card minimums, and other loan payments. Don't include utilities, groceries, or taxes. To improve your DTI, pay down balances (try our debt snowball calculator) or increase income.

Educational estimate, not lending or financial advice — see our disclaimer.

Front-end vs back-end DTI

Lenders often look at two different debt-to-income ratios, and it helps to know which one you're calculating. The front-end ratio (sometimes called the housing ratio) compares only your housing costs to your gross monthly income. For a homeowner, that typically includes the mortgage principal and interest, property taxes, homeowners insurance, and any HOA dues. The back-end ratio is broader: it adds every other recurring debt payment on top of housing, such as car loans, student loans, personal loans, and minimum credit-card payments.

Many mortgage lenders weigh the back-end ratio most heavily because it reflects your total obligations, but the front-end number still matters for housing-heavy budgets. When you compare your situation to a lender's guidelines, make sure you're matching the same type of ratio they quote.

A debt-to-income example

Imagine someone earns $6,000 in gross monthly income. Their recurring debts are a $1,500 mortgage payment, a $400 car loan, a $250 student loan, and $150 in credit-card minimums. Adding the non-housing debts to the housing payment gives $2,300 in total monthly debt.

The back-end DTI is $2,300 ÷ $6,000 × 100, which works out to roughly 38%. The front-end (housing-only) ratio is $1,500 ÷ $6,000 × 100, or 25%. Seeing both numbers side by side makes it clearer where the pressure on the budget is coming from.

How to lower your DTI

If your ratio feels high, there are several common ways people work it down over time:

• Pay down balances on loans and credit cards so the monthly minimums shrink. A structured payoff order, like the one in our debt snowball calculator, can help you stay consistent.
• Avoid taking on new loans in the months before you apply for credit, since a fresh car loan or financed purchase can push your ratio up at the worst time.
• Increase your income where you can, whether through a raise, a side income, or documented overtime, since DTI is a ratio and a larger denominator lowers the percentage.
• Refinance high-payment debt to a lower rate or longer term, which can reduce the monthly payment that counts against you. Our refinance calculator can help you compare the numbers.

Common mistakes to avoid

A few errors can make your DTI estimate misleading:

• Using net pay instead of gross income. DTI is typically based on income before taxes and deductions, so using your take-home pay will overstate your ratio.
• Forgetting to include all debts. Leaving out a student loan, a co-signed payment, or a small personal loan gives a number that looks better than what a lender will see.
• Applying with a too-high ratio. Many lenders prefer to see a back-end ratio below a certain threshold, so it often pays to lower the number first rather than apply and risk a denial.