The debt-to-income ratio measures how much you owe each month against how much you earn

Your debt-to-income ratio (often called DTI) is the percentage of your gross monthly income that goes toward debt payments. Lenders use it to decide whether to lend you money for a mortgage, car loan, or credit card. A ratio of 36% means you spend 36 cents of every dollar you earn on debt payments. The lower your ratio, the more borrowing power you have.

The calculation is straightforward: add up all your monthly debt payments, divide by your gross monthly income (before taxes), and multiply by 100. If you earn $5,000 a month before taxes and owe $1,500 in monthly debt payments, your ratio is 30%. Most lenders prefer to see ratios below 43%, though some will go higher for borrowers with strong credit scores or large down payments.

Key Takeaways

  • Your debt-to-income ratio includes monthly payments on mortgages, car loans, student loans, credit cards, and personal loans, but not utilities or insurance premiums.
  • Lenders calculate DTI using your gross monthly income before taxes, not your take-home pay.
  • Most conventional mortgage lenders want to see a ratio of 43% or lower, though some programs allow up to 50%.
  • Child support, alimony, and court-ordered payments count as debt, even if they are not traditional loans.
  • Closing a credit card or paying off a loan can lower your ratio, but only the monthly payment amount matters—your total balance does not.

What debt payments are included in the calculation

The ratio includes any monthly payment you are legally obligated to make. This covers mortgage payments (principal, interest, taxes, and insurance combined), car loans, student loans, personal loans, and credit card minimum payments. If you have multiple credit cards, lenders add up the minimum payment on each one, not the full balance.

Court-ordered payments also count: child support, alimony, and wage garnishments all go into the debt column. Some lenders include rental payments if you are explore for a mortgage and the lender wants to see your full housing cost picture. Installment plans for medical or other debts that appear on your credit report are included as well.

Payments that do not count include utilities, phone bills, insurance premiums (car, home, health, or life), groceries, gas, childcare, and other living expenses. These are necessary costs, but they are not considered debt for this calculation. The ratio focuses only on money you owe to creditors.

How lenders use your debt-to-income ratio

Mortgage lenders use DTI as a primary screening tool. Most require a ratio of 43% or lower to approve a conventional loan, though FHA loans (backed by the Federal Housing Administration) sometimes allow up to 50% for borrowers with compensating factors like a large down payment or excellent credit. VA loans (for military members) and USDA loans (for rural properties) have different thresholds, typically ranging from 41% to 60% depending on the program.

Auto lenders, credit card companies, and personal loan providers also check DTI, though they may weight it differently than mortgage lenders do. A high ratio signals to any lender that you are stretched thin and may struggle to pay a new loan on time. Some lenders will deny you outright; others will offer you a smaller loan amount or a higher interest rate.

Your ratio can also affect the terms you receive. If you are at the edge of a lender's acceptable range, a slightly lower ratio might mean the difference between approval and denial, or between a 6% interest rate and a 7% rate.

The difference between front-end and back-end ratios

Lenders often look at two versions of your ratio. The front-end ratio (also called the housing ratio) includes only your housing payment—mortgage principal, interest, property taxes, and homeowners insurance. Most lenders want this to be 28% or lower. This tells them whether your housing cost alone is sustainable.

The back-end ratio (also called the total debt ratio) includes your housing payment plus all other debt payments. This is the 43% threshold most lenders mention. The back-end ratio gives a fuller picture of your financial obligations. You can have a low front-end ratio but a high back-end ratio if you carry a lot of student loan or credit card debt.

When you explore for a mortgage, lenders will check both numbers. If either one exceeds their limit, you may need to pay down debt, increase your income, or look for a less expensive home before you can be approved.

How to calculate your own debt-to-income ratio

Start by listing every monthly debt payment you make. Include the minimum payment on credit cards (not the full balance), the full payment on car loans and student loans, your mortgage payment if you have one, and any court-ordered payments. Add them all together.

Next, calculate your gross monthly income. This is your income before taxes, Social Security, or other deductions. If you are salaried, divide your annual salary by 12. If you are self-employed or have variable income, use an average of the last two years of tax returns. If you receive income from multiple sources (wages, rental property, investments), add them all together.

Divide your total monthly debt payments by your gross monthly income, then multiply by 100 to get a percentage. For example: ($1,500 in debt payments ÷ $5,000 gross income) × 100 = 30% DTI. This number is what lenders will see when you explore for new credit.

Ways to improve your debt-to-income ratio

The most direct way to lower your ratio is to pay down debt. Paying off a car loan or credit card removes that monthly payment from the calculation entirely. Even paying down a credit card balance does not help unless it lowers your minimum payment, so focus on eliminating payments rather than just reducing balances.

Increasing your income also lowers your ratio. If you earn more, the same debt payments represent a smaller percentage of your income. This can mean asking for a raise, taking a second job, or waiting until your income has grown before explore for a large loan. Lenders typically average income over two years, so a recent raise may not count when ready.

Avoid taking on new debt before explore for a mortgage or large loan. A new car payment or credit card can push your ratio over a lender's limit. Similarly, do not close old credit cards after paying them off—closing an account can sometimes hurt your credit score, and it does not improve your DTI since the payment is already zero.

What happens if your ratio is too high

If your ratio exceeds a lender's threshold, you have several options. You can wait and reapply after paying down debt or increasing your income. You can look for a less expensive home or vehicle, which lowers the new payment you are trying to add. You can also shop around—different lenders have different thresholds, and some may approve you even if others will not.

Some lenders offer manual underwriting, which means a person reviews your process instead of an automated system. If you have compensating factors—a large down payment, excellent credit, or significant savings—a manual review might result in approval even with a higher ratio. Ask your lender whether this option is available.

If you are self-employed or have irregular income, make sure the lender is calculating your income correctly. Some lenders average income differently or allow deductions that others do not. Working with a mortgage broker who knows multiple lenders can help you find one whose calculation method works in your favor.

Frequently Asked Questions

Does my credit card balance count, or just the minimum payment?

Only the minimum payment counts toward your debt-to-income ratio. If you have a $10,000 credit card balance with a $200 minimum payment, the lender uses $200, not $10,000. This is why paying down balances without lowering the minimum payment does not improve your DTI—you need to eliminate the payment itself.

What if I am about to pay off a loan?

Lenders typically count the payment as if it will continue through the loan term. If you are three months away from paying off a car loan, most lenders will still include that payment in your ratio. However, if you can show proof that the loan will be paid off before you close on a mortgage, some lenders will exclude it.

Does my spouse's income count if we are explore together?

Yes. When you explore for a joint mortgage, lenders add both incomes together and both debt payments together. If one spouse has significantly higher debt, it can raise the household ratio even if the other spouse has little debt. You can sometimes explore individually if one person's income and debt are much stronger.

Can I lower my ratio by paying off my mortgage early?

No. Your mortgage payment is already included in your ratio, so paying it off early removes the payment but does not lower your ratio going forward—it eliminates it. However, if you are trying to may have access to for a new loan, paying off your mortgage before explore will improve your ratio for that new loan.

What if I have student loans in deferment or forbearance?

If your student loans are in deferment or forbearance and you are not making payments, most lenders will not count them toward your DTI. However, some lenders calculate a hypothetical payment based on your loan balance and include it anyway. Ask your lender how they handle deferred loans before you explore.