Your debt-to-income ratio is the percentage of your gross monthly income that goes toward debt payments

Your debt-to-income ratio (often called DTI) is a number that lenders use to decide whether to lend you money. It compares how much you owe each month to how much you earn each month, before taxes. If you earn $5,000 a month and your debt payments total $1,500 a month, your DTI is 30 percent.

Lenders care about this number because it shows them how stretched your budget already is. A person with a 20 percent DTI has more breathing room than someone at 50 percent. The higher your ratio, the riskier you look as a borrower—and the less likely a lender is to say yes, or the higher the interest rate they will charge.

Your DTI affects whether you can borrow money for a house, a car, a personal loan, or a credit card. It also affects the terms you get. Understanding what yours is helps you see why a lender said no, or why another lender offered you a worse rate than you expected.

Key Takeaways

  • Debt-to-income ratio is your total monthly debt payments divided by your gross monthly income, expressed as a percentage.
  • Most mortgage lenders want to see a DTI of 43 percent or lower, though some will go higher if other parts of your process are strong.
  • Your DTI includes car loans, student loans, credit card minimums, and mortgage or rent payments—but not utilities, groceries, or insurance.
  • You can lower your DTI by paying down debt, increasing your income, or both.
  • Different types of loans have different DTI thresholds, so a ratio that works for a car loan might not work for a mortgage.

How lenders calculate your debt-to-income ratio

Lenders add up all your monthly debt payments and divide by your gross monthly income. Gross income is what you earn before taxes are taken out. If you are paid $60,000 a year, your gross monthly income is $5,000.

The debts that count are recurring monthly obligations: car loans, student loans, credit card minimum payments, mortgage or rent, personal loans, and sometimes child support or alimony. The debts that do not count are utilities, groceries, insurance premiums, phone bills, and one-time expenses. A lender is not looking at your whole budget—only the debts that show up on your credit report or that you tell them about.

If you have a mortgage, some lenders calculate DTI two ways. The first is front-end ratio (or housing ratio), which includes only your housing payment—mortgage, property taxes, homeowners insurance, and HOA fees if you have them. The second is back-end ratio (or total DTI), which includes housing plus all other debts. Most lenders focus on back-end ratio, but some use both.

What DTI thresholds mean for different types of loans

Mortgage lenders typically want a back-end DTI of 43 percent or lower. Some will go to 50 percent if you have a large down payment, a high credit score, or significant savings. A few specialized lenders will go higher, but 43 percent is the standard threshold used by Fannie Mae and Freddie Mac, the government-backed companies that buy most mortgages in the United States.

Car lenders are usually more flexible. Many will lend to someone with a DTI of 50 percent or higher, because a car loan is secured by the car itself—if you do not pay, they take the car back. Personal loans and credit cards have higher thresholds still, sometimes 60 percent or more, because the lender has less to recover if you default.

Student loans are treated differently by different lenders. Federal student loans do not require a DTI check at all. Private student loan lenders may look at DTI, but they often focus more on credit score and income stability.

Why a high debt-to-income ratio can hurt you

A high DTI tells a lender that you have little room in your budget for a new payment. If you are already paying 50 percent of your income toward debt, adding a mortgage or car loan means you are spending more than half your gross income on debt alone—before you pay for food, housing (if you are renting), utilities, or anything else. That is a sign you might not be able to handle the new payment if something goes wrong, like a job loss or medical emergency.

A high DTI can also cost you money. Even if a lender says yes, they may charge you a higher interest rate to offset the risk. A 0.5 percent higher rate on a $300,000 mortgage adds up to thousands of dollars over 30 years. Some lenders will deny you outright if your DTI is too high, no matter how good your credit score is.

DTI also affects how much money a lender will let you borrow. If you want a $400,000 mortgage but your DTI is already at 40 percent, a lender might only approve you for $250,000, because adding the larger payment would push your DTI over their threshold.

How to calculate your own debt-to-income ratio

Start with your gross monthly income. 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 from the last two years or the last 12 months, whichever is lower—that is what most lenders do.

Next, list all your monthly debt payments. Include the minimum payment on credit cards, not the full balance. Include car loans, student loans, personal loans, mortgage or rent, and any other recurring debt. Do not include utilities, groceries, insurance, or childcare.

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 percent DTI.

Ways to lower your debt-to-income ratio

The most direct way is to pay down debt. Every dollar you pay toward a car loan, credit card, or student loan lowers your monthly payment and your DTI. Paying off a credit card entirely removes that minimum payment from the calculation. Paying down a car loan by $5,000 might lower your monthly payment by $100 or more, depending on how much time is left on the loan.

You can also increase your income. A raise, a second job, or side work increases your gross monthly income, which lowers your DTI even if your debt stays the same. If you earn $5,000 a month with $1,500 in debt (30 percent DTI) and your income rises to $6,000, your DTI drops to 25 percent without paying off a single dollar.

Some people do both: they pay down debt while working toward a raise or a higher-paying job. This is slower but more sustainable. Paying off debt alone can take years if the balances are large. Increasing income alone might not be possible on your timeline. Together, they move the needle faster.

DTI and other factors lenders look at

DTI is one piece of the lending decision, not the whole picture. A lender also looks at your credit score, your payment history, how much money you have saved, how long you have been at your job, and the size of your down payment. Someone with a 45 percent DTI and a 750 credit score might get approved for a mortgage, while someone with a 40 percent DTI and a 600 credit score might not.

Lenders also consider what the new loan is for. A mortgage is secured by the house, so lenders are more willing to lend. A personal loan is unsecured, so lenders are more cautious. A car loan falls in between. The type of loan you are seeking affects how much weight the lender puts on your DTI.

Your employment history and income stability matter too. A lender is more comfortable with a high DTI if you have been at the same job for five years than if you just started three months ago. Self-employed people often face stricter DTI limits because their income is seen as less stable.

Frequently Asked Questions

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

For mortgage applications, yes—lenders include your current rent payment in the DTI calculation. Once you get the mortgage, your new mortgage payment replaces the rent in the calculation. For other types of loans, some lenders include rent and some do not. Always ask the lender what they count.

What if I am self-employed or my income varies?

Lenders typically average your income over the last two years, or use the most recent 12 months if that is lower. If you are self-employed, bring tax returns for the last two years. If you have a seasonal job, the lender will use the average, not your peak month. This is why self-employed borrowers sometimes have a harder time—the average may be lower than what you actually earn in good months.

Can I lower my DTI by paying off a credit card right before I explore for a loan?

Paying off a credit card lowers your DTI, but closing the account can hurt your credit score because it reduces your available credit. If you are planning to explore for a loan soon, pay down the card but leave the account open. The payment goes down, your DTI improves, and your credit score stays stable.

What is a good debt-to-income ratio?

Below 36 percent is considered good by most lenders. Between 36 and 43 percent is acceptable for mortgages. Above 43 percent makes borrowing harder and more expensive. The lower your DTI, the more options you have and the better rates you will see.

Do student loans count the same way as other debts?

Federal student loans count as a monthly debt payment, usually calculated as 0.5 to 1 percent of the total balance if you are in deferment or forbearance. If you are making payments, the actual payment amount counts. Private student loans count as the actual monthly payment. Income-driven repayment plans can lower your calculated payment for DTI purposes.