What Your Debt-to-Income Ratio Is and Why It Matters
Your debt-to-income ratio is the percentage of your gross monthly income that goes toward debt payments. It is calculated by adding up all your monthly debt payments and dividing by your gross monthly income, then multiplying by 100. Lenders use this number to decide whether to approve you for a mortgage, car loan, credit card, or personal loan — it tells them how much of your paycheck is already spoken for.
A lower ratio means you have more breathing room in your budget and are less risky to lend to. Most lenders want to see a ratio below 43 percent, though some mortgage lenders will go up to 50 percent if your credit score is strong. If your ratio is above 50 percent, you may find it difficult to borrow money at all, or you may be offered worse terms.
Understanding your own ratio before you explore for credit gives you a realistic picture of what you can afford and what lenders are likely to say yes to. It also shows you where your money is going and whether paying down debt could open up borrowing options.
Key Takeaways
- Debt-to-income ratio is your total monthly debt payments divided by your gross monthly income, expressed as a percentage.
- You must include all recurring monthly debt: mortgage or rent, car loans, student loans, credit card minimums, and personal loans.
- Use your gross income before taxes, not your take-home pay, and use the same month for both the numerator and denominator.
- Most lenders prefer a ratio below 43 percent, though mortgage lenders sometimes accept up to 50 percent.
- Paying down debt or increasing income will lower your ratio and improve your chances of loan approval.
Gather Your Monthly Debt Payments
Start by listing every debt payment you make each month. This includes your mortgage or rent (if you rent, include the full rent amount), car loans, student loans, credit card minimum payments, personal loans, medical debt payments, and any other installment loans. Do not include utilities, groceries, insurance premiums, or other living expenses — only debt.
If you pay a debt quarterly or annually, convert it to a monthly figure. For example, if you pay a car insurance premium of $600 twice a year, that is $100 per month. If you have a credit card with a $5,000 balance and a 2 percent minimum payment, that is $100 per month.
Write down the actual payment amount you are making right now, not what you could pay or what you owe in total. If you are in forbearance on a student loan and making no payments, use zero for that month. Once you have every payment listed, add them all together to get your total monthly debt payments.
Find Your Gross Monthly Income
Gross income is what you earn before taxes, Social Security, health insurance, or any other deductions come out. 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 — because you work commission, tips, seasonal work, or freelance — use an average. Look at the past 12 months of income, add it up, and divide by 12. This gives lenders a realistic picture of what you typically earn.
If you have multiple income sources, add them all together. Include your salary, side income, rental income, Social Security, disability payments, alimony, or child support you receive. Do not include money from loans, gifts, or one-time payments. Use only income you can reasonably expect to receive every month.
Do the Math: The Formula and an Example
The formula is straightforward:
(Total Monthly Debt Payments ÷ Gross Monthly Income) × 100 = Debt-to-Income Ratio
Here is a worked example. Suppose your gross monthly income is $5,000. Your monthly debt payments are:
- Mortgage: $1,200
- Car loan: $350
- Student loan: $200
- Credit card minimum: $75
- Personal loan: $150
Total debt payments: $1,200 + $350 + $200 + $75 + $150 = $1,975
Debt-to-income ratio: ($1,975 ÷ $5,000) × 100 = 39.5 percent
In this example, 39.5 percent of gross income goes to debt, which is below the 43 percent threshold most lenders use. This person would likely be approved for additional credit, though the actual decision depends on credit score, employment history, and the lender's own rules.
What Counts and What Does Not
Include any payment you are legally obligated to make each month. This covers mortgages, rent, car loans, student loans, credit card minimums, personal loans, medical debt payments, alimony, child support, and lines of credit. If you co-signed a loan, include it even if someone else makes the payment — you are still liable.
Do not include utilities, phone bills, groceries, gas, insurance premiums, medical copays, or childcare. These are living expenses, not debt. Do not include money you owe but are not currently paying — only active monthly payments count. Do not include the full credit card balance, only the minimum payment you are required to make.
Some lenders ask for a housing ratio as well, which is just your mortgage or rent divided by gross income. This is usually kept below 28 percent. If you are explore for a mortgage, the lender will calculate both your housing ratio and your full debt-to-income ratio.
How Lenders Use Your Ratio
When you explore for a loan, the lender pulls your credit report and calculates your debt-to-income ratio using the debts they can see. They also ask you to report your income. If your ratio is below 43 percent and your credit score is decent, approval is likely. If your ratio is between 43 and 50 percent, approval depends on your credit score, down payment, employment history, and the type of loan.
Above 50 percent, most lenders will decline you or offer much worse terms. Some lenders have stricter limits — for example, some mortgage lenders cap it at 36 percent, while others go to 50 percent. The limit also varies by loan type: mortgage lenders are often more flexible than credit card issuers.
Your ratio can change month to month if your income fluctuates or if you pay down debt. Paying off a car loan or credit card will lower your ratio when ready. Getting a raise or taking a second job will also lower it. If you are planning to explore for a large loan, paying down debt first can make the difference between approval and rejection.
Steps to Lower Your Ratio
The fastest way to lower your ratio is to pay down debt. Every dollar you pay toward a loan reduces your monthly payment and your ratio. Focus on the smallest balances first if you want quick wins, or the highest interest rates first if you want to save money long-term. Either way, the effect on your ratio is the same.
Increasing your income also lowers your ratio without requiring you to pay off debt. A raise, a bonus, a second job, or rental income all count. Even a small increase in gross income can move your ratio below a lender's threshold. If you are self-employed, documenting higher income through tax returns takes time, so plan ahead if you are expecting a raise.
Avoid taking on new debt while you are trying to lower your ratio. A new car loan or credit card will raise your ratio when ready. If you must borrow, do it after you have been approved for the loan you are seeking.
Frequently Asked Questions
Should I use my take-home pay or gross income?
Always use gross income — what you earn before taxes and deductions. Lenders use this because it is verifiable on tax returns and pay stubs. Using take-home pay would artificially lower your ratio and give you a false picture of what you can actually borrow.
Does my spouse's income count if we are married?
If you are explore for a loan together, both incomes count and both debts count. If you are explore alone, only your income and debts matter, even if you are married. Some lenders will consider a spouse's income if you are on the same account, so ask the lender what they need.
What if I have a zero balance on my credit card?
If you have a credit card with a zero balance, most lenders still count a minimum payment — usually 2 to 5 percent of the credit limit. So a card with a $10,000 limit counts as a $200 to $500 monthly payment even if you owe nothing. This is why closing unused cards can sometimes lower your ratio.
Does rent count as a debt payment?
Yes. If you rent, your full monthly rent is included in your debt-to-income ratio. This is why renters often have higher ratios than homeowners with the same income — rent is treated the same as a mortgage payment.
Can I lower my ratio by paying off debt right before I explore for a loan?
Yes, and it is a smart move. Paying off a credit card or car loan in the weeks before you explore will lower your ratio and improve your chances of approval. The lender will see the lower payment amount on your credit report. Just do not close the account when ready after paying it off, because closing accounts can temporarily hurt your credit score.