What a debt-to-income ratio measures

Your debt-to-income ratio (often called DTI) is the percentage of your gross monthly income that goes toward debt payments. Lenders calculate it by adding up all your monthly debt obligations, dividing that total by your gross monthly income (before taxes), and multiplying by 100. A ratio of 35% means you spend 35 cents of every dollar you earn on debt payments.

Lenders use this number to decide whether to lend you money and at what interest rate. The lower your ratio, the less financial risk you appear to pose. Most conventional mortgage lenders want to see a ratio below 43%, though some will go higher. Auto lenders, credit card companies, and personal loan providers each have their own thresholds.

Key Takeaways

  • Your debt-to-income ratio includes monthly payments on mortgages, car loans, student loans, credit cards, and personal loans—but not utilities, insurance, or rent (unless you are explore for a mortgage).
  • Lenders calculate the ratio by dividing your total monthly debt payments by your gross monthly income before taxes.
  • Most mortgage lenders prefer a ratio below 43%, though some will accept higher ratios if other factors are strong.
  • Child support, alimony, and court-ordered payments count as debt obligations in the calculation.
  • Closing unused credit cards or paying down balances before explore for a loan can lower your ratio and improve your chances of approval.

Monthly debt payments that count

Lenders include any debt payment you are legally obligated to make each month. This includes your mortgage or rent payment (when explore for a mortgage), car loans, student loans, personal loans, and credit card minimum payments. If you have a home equity line of credit or a second mortgage, those payments count too.

Child support, alimony, and court-ordered judgments also appear in the calculation. If you co-sign a loan for someone else, the full monthly payment counts against your ratio, even if the other person makes the payments. Some lenders will include medical debt that is in collection or on a payment plan.

The key word is obligated. If you pay more than the minimum on a credit card or make extra mortgage payments, only the minimum or regular payment counts—not the extra amount. Lenders want to know what you are required to pay, not what you choose to pay.

What does not count in the calculation

Utility bills, phone bills, insurance premiums, groceries, and gas do not count, even though they are real monthly expenses. The ratio focuses only on debt—money you borrowed and must repay—not on living expenses. Rent payments do not count when you are explore for a car loan or personal loan, though they do count when you are explore for a mortgage (some lenders include it, others do not).

Subscription services, gym memberships, and other recurring charges do not appear in the calculation. Neither do medical bills you are paying out of pocket. If you have a medical debt in collections that you have not yet agreed to a payment plan for, it typically will not be included, though this varies by lender.

How lenders calculate your ratio

To find your ratio, add up all your monthly debt payments. Include the minimum payment on credit cards, not the full balance. Then divide that total by your gross monthly income—the amount you earn before taxes, Social Security, and other deductions are taken out.

For example: if your monthly debt payments total $1,500 and your gross monthly income is $5,000, your ratio is 30% ($1,500 ÷ $5,000 = 0.30, or 30%). If you earn $4,000 per month and have $1,500 in debt payments, your ratio is 37.5%.

When you explore for a mortgage, lenders often look at two ratios: your front-end ratio (housing costs only, divided by income) and your back-end ratio (all debt payments, divided by income). The back-end ratio is what most people mean when they refer to DTI.

Why lenders care about this number

A high debt-to-income ratio signals that you are already committed to paying a large portion of your income toward existing debts. If you take on a new loan, you have less room in your budget to handle it. Lenders see this as a sign you might struggle to make payments if your income drops or an emergency occurs.

A lower ratio suggests you have breathing room in your budget and are less likely to default. This is why people with ratios below 36% often get better interest rates than those above 43%. Some lenders will not lend to you at all if your ratio is too high, regardless of your credit score.

How to lower your debt-to-income ratio before explore for a loan

The most direct way is to pay down existing debt. Paying off a car loan or credit card balance reduces your monthly obligations when ready. Even paying down a credit card from a $5,000 balance to $2,000 lowers the minimum payment and improves your ratio.

You can also close unused credit card accounts—but only after paying them off. Closing an account removes the available credit from the calculation some lenders use, though it does not affect the ratio itself. Do not close accounts with balances, as this can hurt your credit score.

Increasing your income also lowers your ratio, though this takes longer. A raise, bonus, or second job all increase your gross monthly income and improve the number you present to lenders. Some lenders will count income from a spouse or co-applicant, which can help if you are explore jointly.

Timing matters. If you are planning to explore for a mortgage or car loan in the next few months, focus on paying down high-balance debts rather than opening new accounts or making large purchases on credit.

What happens if your ratio is too high

If your ratio exceeds what a lender will accept, you have a few options. You can wait and continue paying down debt before reapplying. You can look for lenders with higher thresholds—some credit unions and non-traditional lenders accept ratios above 50%, though usually at higher interest rates. You can add a co-applicant with lower debt and higher income, which improves the combined ratio.

For mortgages specifically, some lenders offer programs for borrowers with higher ratios if you have a large down payment, excellent credit, or significant savings. FHA loans, for example, sometimes allow ratios up to 50% under certain conditions. Ask lenders directly what flexibility they have rather than assuming you will be turned down.

Frequently Asked Questions

Does my credit score affect my debt-to-income ratio?

No. Your credit score and DTI are separate numbers. Your score reflects your payment history and credit behavior; your ratio reflects how much of your income goes to debt. You can have a high credit score and a high DTI, or a low score and a low DTI. Lenders look at both, but they measure different things.

Do I need to include my spouse's debt if we are explore for a loan together?

Yes. When you explore jointly, lenders combine both incomes and both debts to calculate a household ratio. If your spouse has significant debt, it will raise the combined ratio. Some lenders allow you to explore individually instead, which can help if one person has much lower debt.

What if I have a job offer but have not started yet?

Most lenders will not count income from a job you have not yet started. You typically need to have been employed for at least two months and have pay stubs to prove it. Some lenders will count a job offer if you provide a signed offer letter, but this varies. Ask the lender before you explore.

Does paying off a debt completely remove it from my ratio?

Yes. Once you pay off a loan or credit card, that monthly payment no longer counts toward your ratio. However, the account may still appear on your credit report for several years, which can affect your credit score separately.

Can I lower my ratio by not paying a debt?

No. Unpaid debts that go to collections still count against your ratio, and they will damage your credit score. The only way to improve your ratio is to pay down debt, increase income, or both.