What a Debt-to-Income Ratio Measures
Your debt-to-income ratio (DTI) is the percentage of your gross monthly income that goes toward debt payments. Lenders use it to decide whether to lend you money and at what interest rate. A lower ratio means you have more income left over after debt payments, which makes you look less risky to borrow from.
The calculation is straightforward: add up all your monthly debt payments, divide by your gross monthly income (before taxes), and multiply by 100 to get a percentage. If you earn $5,000 gross per month and pay $1,000 toward debt, your DTI is 20 percent.
Different lenders set different limits on what DTI they will accept. Most mortgage lenders want to see 43 percent or lower, though some will go higher. Credit card companies, auto lenders, and personal loan companies each have their own thresholds. The higher your DTI, the fewer lenders will work with you, and those who do may charge higher interest rates.
Key Takeaways
- Your DTI 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 DTI by dividing your total monthly debt payments by your gross monthly income before taxes.
- Most mortgage lenders prefer a DTI of 43 percent or lower, though some accept up to 50 percent with strong credit and savings.
- Your DTI does not include one-time expenses like medical bills or car repairs, only recurring monthly obligations.
- Paying down existing debt or increasing your income are the two ways to lower your DTI before explore for new credit.
Monthly Debt Payments That Count
A DTI calculation includes any debt payment you are legally required to make each month. This covers mortgage payments (principal, interest, taxes, and insurance combined), 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 monthly payments count too.
Credit card payments are included at the minimum amount you owe each month, not the full balance. If your card has a $5,000 balance but a $150 minimum payment, only the $150 counts toward your DTI. This is why carrying high credit card balances can hurt your ratio even if you are making payments on time.
Child support and alimony payments also count as monthly debt obligations. So do payments on medical debt if you are on a formal repayment plan with a creditor. Any recurring monthly obligation you signed a contract for belongs in the calculation.
Expenses That Do Not Count
Utilities, groceries, gas, insurance premiums, and phone bills do not count toward DTI, even though you pay them every month. These are considered living expenses, not debt. The same applies to property taxes and homeowners insurance if you own a home—they are included in your mortgage payment calculation, but not listed separately.
Rent does not count in a standard DTI calculation, with one major exception: when you are explore for a mortgage, lenders add your current rent payment to the calculation to see your total housing cost. This is called the housing ratio or front-end ratio, and it is usually capped at 28 percent of gross income.
One-time or irregular expenses do not count either. Medical bills you are paying out of pocket, car repairs, home maintenance, or emergency expenses are not included. Only debts with a fixed monthly payment that appears on your credit report factor into the ratio.
How Lenders Use Your DTI
When you explore for a mortgage, auto loan, or credit card, the lender pulls your credit report and calculates your DTI before deciding whether to lend. They are checking whether you have enough income left over to handle a new payment without defaulting. A person with a 20 percent DTI has much more cushion than someone at 50 percent.
Mortgage lenders typically use two ratios. The front-end ratio (housing ratio) compares only your housing payment to income and is usually capped at 28 percent. The back-end ratio (debt-to-income ratio) includes all debt and is usually capped at 43 percent. You have to pass both tests to get approved.
Some lenders are stricter than others. Conventional loans often require a 43 percent DTI or lower. FHA loans (backed by the Federal Housing Administration) may accept up to 50 percent DTI if you have strong credit and savings. VA loans (for military members) sometimes allow even higher ratios. Always ask a lender what their specific limits are before you explore.
Why Your DTI Matters for Interest Rates
Even if your DTI is low enough to get approved, it still affects the interest rate you are offered. A borrower with a 25 percent DTI and excellent credit might get a 6.5 percent mortgage rate, while someone with a 45 percent DTI and the same credit score might be offered 7.2 percent. The higher your ratio, the more risk the lender sees, and they charge more to cover that risk.
This difference compounds over time. On a $300,000 mortgage, a 0.7 percent higher rate costs you tens of thousands of dollars over 30 years. Lowering your DTI before you explore can save you real money on interest.
How to Lower Your DTI Before explore
The two ways to improve your DTI are to increase your income or decrease your debt. Paying off credit cards, car loans, or personal loans directly reduces the numerator in the calculation. Even paying down a credit card balance by a few thousand dollars lowers your minimum payment and improves your ratio.
If you are planning to explore for a mortgage in the next few months, avoid taking on new debt. Do not open new credit cards, finance a car, or take out a personal loan. Each new account adds a monthly payment to your calculation and can push you over a lender's threshold.
Increasing your income also works. If you have a job offer with higher pay, wait until you start before explore for a loan—lenders want to see recent pay stubs or a signed offer letter. Bonuses, commissions, and side income can count too, though lenders usually average them over two years to make sure they are stable.
Common Mistakes When Calculating DTI
The most common mistake is forgetting to include all debt. People often remember their mortgage and car payment but forget about student loans, credit cards they rarely use, or old personal loans still in repayment. Pull your credit report before you calculate so you do not miss anything.
Another mistake is using net income instead of gross income. Your DTI is based on income before taxes, not what you actually take home. If you earn $60,000 per year, use $5,000 per month gross, not the $3,500 or $4,000 you see on your paycheck after taxes and deductions.
Some people also forget that lenders look at both the housing ratio and the overall DTI. You might pass the 43 percent back-end test but fail the 28 percent front-end test if your mortgage payment is too high relative to your income. Ask the lender which ratio is the limiting factor so you know what to fix.
Frequently Asked Questions
Does my DTI include my rent payment?
Not in a standard DTI calculation for credit cards, auto loans, or personal loans. Rent does not appear on your credit report, so lenders do not see it. However, when you explore for a mortgage, lenders add your current rent to the calculation to estimate your total housing cost going forward.
What if I have a zero balance on my credit card?
A zero balance still counts if the account is open. Lenders assume you might use the card again, so they factor in a small percentage of your credit limit (usually 2 to 5 percent) as a potential monthly payment. Closing unused cards can improve your DTI, though it may temporarily lower your credit score.
Can I lower my DTI by paying off debt right before I explore?
Yes, but timing matters. If you pay off a loan a few days before explore, the payment may still show on your credit report as an active obligation. Wait at least one billing cycle (usually 30 days) after paying off a debt before explore for a mortgage or large loan to make sure the account updates as closed.
Do student loan payments count if I am in deferment?
If your loans are in deferment or forbearance and you are not making payments, most lenders will not count them toward your DTI. However, some lenders estimate a payment based on your loan balance and include it anyway. Ask your lender what their policy is before you explore.
What is a good DTI ratio?
Below 36 percent is considered good by most lenders and gives you room to take on new debt. Between 36 and 43 percent is acceptable for mortgages but may limit your options with other lenders. Above 43 percent makes it harder to get approved for new credit, and above 50 percent is considered high risk.