How Your Debt-to-Income Ratio Affects Your Credit Score and Borrowing Power

Your debt-to-income ratio and credit score are separate numbers that work together

Your debt-to-income ratio (DTI) is the percentage of your gross monthly income that goes toward debt payments. It does not directly appear on your credit report, and it does not change your credit score the way a missed payment does. However, lenders look at both numbers when deciding whether to lend you money and at what interest rate.

Your credit score reflects your payment history, how much credit you are using, and the age of your accounts. Your DTI reflects how much of your paycheck is already spoken for. A lender cares about both because a high credit score means you have paid past debts on time, but a high DTI means you may struggle to pay a new debt even if you have the willingness to do so.

Understanding the difference matters because you can improve one without automatically improving the other. Paying down debt lowers your DTI when ready but may lower your credit score temporarily. Conversely, opening a new credit card to spread out your balances lowers your DTI but can hurt your score in the short term.

Key Takeaways

• Debt-to-income ratio is calculated by dividing your total monthly debt payments by your gross monthly income and multiplying by 100 to get a percentage.
• Most lenders prefer a DTI below 36 percent, though some mortgage lenders accept up to 43 percent depending on other factors.
• Your DTI does not appear on your credit report and does not directly affect your credit score, but lenders check it before approving loans.
• Paying down debt lowers your DTI but may temporarily lower your credit score if you close accounts afterward.
• A high DTI can cause a lender to deny you or offer a higher interest rate, even if your credit score is good.

How to calculate your own debt-to-income ratio

Start with your gross monthly income — the amount you earn before taxes, not what lands in your bank account. If you are salaried, divide your annual salary by 12. If you are paid hourly, multiply your hourly rate by the number of hours you typically work per week, then multiply by 52 weeks and divide by 12. If your income varies month to month, use an average of the past two months.

Next, list all monthly debt payments: credit card minimum payments, car loans, student loans, personal loans, mortgage or rent (some lenders count this, some do not), and any other regular debt obligation. Do not include utilities, groceries, or insurance unless they are part of a debt payment. Add these up to get your total monthly debt payments.

Divide your total monthly debt payments by your gross monthly income, then multiply by 100. For example, if your gross monthly income is $5,000 and your total monthly debt payments are $1,500, your DTI is 30 percent. Most lenders want to see a DTI of 36 percent or lower, though some mortgage lenders will go up to 43 percent if your credit score and down payment are strong.

Why lenders care about your DTI more than your credit score alone

A high credit score tells a lender you have paid past debts on time. A low DTI tells them you have room in your budget to pay a new debt. Together, these numbers predict whether you will actually pay back a new loan. Someone with a 750 credit score but a 50 percent DTI is a riskier bet than someone with a 680 score and a 25 percent DTI, because the second person has money left over each month after their current obligations.

This is why you can be denied for a mortgage or car loan even with good credit. The lender is not questioning your willingness to pay — your score proves that. They are questioning your ability to pay. If your paycheck is already committed to other debts, adding a $1,500 mortgage payment may be mathematically impossible, regardless of your track record.

Different types of lenders have different DTI thresholds. Mortgage lenders typically use 43 percent as a hard ceiling, though some use 36 percent. Auto lenders often accept DTI up to 50 percent. Credit card companies do not usually calculate DTI the same way, but they do look at your total outstanding balances relative to your income. Personal loan lenders vary widely.

What counts as debt in your DTI calculation

Most lenders count these payments: monthly mortgage or rent (though some exclude rent), car loans, student loans, personal loans, credit card minimum payments, and any other installment debt with a fixed monthly payment. Some lenders also count alimony, child support, and court-ordered judgments.

Utilities, insurance premiums, groceries, and medical bills typically do not count, even though they are real expenses. The reason is that DTI measures debt specifically — money you owe to a creditor — not all spending. However, mortgage lenders sometimes add property taxes and homeowners insurance to the mortgage payment when calculating DTI for a home loan.

Credit card balances count as debt only if you are making a payment on them. If you have a $5,000 balance but pay it in full each month, most lenders count only your minimum payment (or the full payment if you pay it off). If you carry a balance and make minimum payments, they count the minimum payment amount.

How paying down debt affects your DTI and credit score differently

Paying down debt lowers your DTI when ready because your monthly debt payments decrease. If you owe $1,500 per month and pay off a $300 car loan, your DTI drops right away. This is the fastest way to improve your DTI for a loan process.

However, paying off debt can temporarily lower your credit score. When you pay off a loan, you lose the positive payment history that account was building. If you close the account afterward, you also lose the available credit, which can raise your credit utilization ratio (the percentage of your credit limit you are using). These effects are usually small and temporary — your score typically recovers within a few months — but they are real.

If you are planning to explore for a mortgage or large loan, the timing matters. Paying down debt three to six months before you explore gives your credit score time to recover while your lower DTI helps your process. Paying down debt the week before you explore helps your DTI but may hurt your score at the exact moment the lender is reviewing it.

The difference between DTI and credit utilization ratio

These two numbers are often confused because both involve debt and both affect your borrowing power, but they measure different things. Your credit utilization ratio is the percentage of your available credit that you are currently using. If you have a credit card with a $5,000 limit and a $2,000 balance, your utilization on that card is 40 percent. Your overall utilization is the sum of all your balances divided by the sum of all your limits.

Credit utilization appears on your credit report and directly affects your credit score — it accounts for about 30 percent of most credit scores. DTI does not appear on your credit report at all. A lender calculates your DTI themselves using information you provide on a loan process.

You can have a low DTI and a high utilization ratio (you earn a lot but are using most of your available credit), or a high DTI and a low utilization ratio (you earn less but are not using much credit). Both scenarios can hurt your borrowing power, but for different reasons. High utilization suggests you are relying heavily on credit. High DTI suggests you cannot afford new debt.

Steps to improve your DTI before explore for a loan

The most direct way to lower your DTI is to pay down debt. Focus on accounts with the highest monthly payments first — paying off a car loan saves more on your monthly obligations than paying off a credit card with a $50 minimum. You do not have to pay off the entire balance, just enough to lower your monthly payment.

Increasing your income also lowers your DTI, though this takes longer. A raise, a second job, or freelance income all count as gross income. If you can document a recent increase in income, some lenders will use the new, higher number when calculating your DTI, even if you have not been earning it for a full year.

Avoid opening new debt right before a loan process. A new car loan, credit card, or personal loan will increase your monthly debt payments and lower your DTI. Even if you do not use the new account, the lender counts the payment obligation. Wait until after your loan closes to open new credit.

Do not close credit cards after paying them off, even though it feels like progress. Closing an account lowers your available credit, which raises your utilization ratio and can hurt your credit score. Keep the account open with a zero balance instead.

Frequently Asked Questions

Does paying off a credit card improve my credit score right away?

Paying off a balance lowers your utilization ratio, which should improve your score within a month or two. However, if you close the account, you lose available credit and may see a temporary dip. Keep the account open to see the full benefit.

Can I have a good credit score but still be denied for a mortgage?

Yes. If your DTI is too high, a lender may deny you even with a 750 credit score. They are not questioning your willingness to pay — your score proves that. They are questioning whether you have enough income left over after your current debts to afford the new loan payment.

What if my income is irregular or seasonal?

Most lenders average your income over the past two years. If you are self-employed or have seasonal work, bring tax returns and bank statements showing your typical earnings. Some lenders will use a lower average if your income has been declining.

Does rent count toward my debt-to-income ratio?

It depends on the lender. Mortgage lenders usually count rent as a debt payment when calculating DTI. Auto and personal loan lenders often do not. Ask the lender before you explore so you know what number to expect.

How long does it take to improve my DTI?

DTI improves as soon as you lower your monthly debt payments, so paying off a loan can change your DTI within days. However, if you are waiting for income to increase or for a new job to start, it may take weeks or months to see the improvement reflected on a loan process.