What is a Debt-to-Income (DTI) Ratio?
Your Debt-to-Income (DTI) ratio is a personal finance measure that compares your monthly debt payment to your monthly gross income. Your gross income is your pay before taxes and other deductions are taken out. Your debt-to-income ratio is the percentage of your gross monthly income that goes to paying your monthly debt payments.
Lenders, such as banks and credit unions, use this ratio as one of the primary indicators to determine your borrowing risk. A low DTI indicates that you have a good balance between debt and income, making you a safer candidate for a new loan or mortgage.
DTI = (Total Monthly Debt / Gross Monthly Income) × 100
Front-End vs. Back-End DTI Ratios
When applying for a mortgage, lenders typically look at two different DTI calculations to get a complete picture of your finances.
Front-End Ratio
Also known as the housing ratio. This calculation only looks at how much of your gross income goes toward housing costs.
- Mortgage Principal & Interest
- Property Taxes
- Homeowners Insurance
- HOA Dues
Lender Preference: Generally 28% or lower.
Back-End Ratio
Also known as the total debt ratio. This is what our calculator above uses. It includes all housing costs PLUS all other recurring minimum debt obligations.
- Credit card minimums
- Auto loans
- Student loans
- Personal loans & Child Support
Lender Preference: Generally 36% or lower.
What is a Good DTI for a Mortgage?
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Under 36%Excellent / Good
This is the ideal range for most lenders. A DTI of 35% or less shows you have manageable debt and plenty of disposable income to handle a new mortgage payment or financial emergencies.
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36% - 43%Moderate / Acceptable
Many lenders will still approve conventional mortgages and FHA loans in this range. However, pushing past 43% (the "Qualified Mortgage" limit) makes borrowing significantly harder. Lenders may require a higher credit score or larger down payment.
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44% - 50%+High Risk / Red Flag
If nearly half of your income is dedicated to paying off debt, lenders view you as a high-risk borrower. You will likely struggle to get approved for new lines of credit. Your priority should be aggressively paying down existing debt before seeking new loans.
Frequently Asked Questions (FAQ)
Do I include basic living expenses in my DTI?
No. Your debt-to-income ratio strictly looks at debt. You should not include variable living expenses such as groceries, utility bills (electricity, water), health insurance premiums, internet/cable bills, or transportation costs (gas). Only include legally binding debt contracts.
Which credit card amount do I use for DTI?
For credit cards, lenders only look at the minimum monthly payment due, not your total balance. Even if you pay your balance in full every month, the lender calculates your DTI based on the minimum required payment reported on your credit file.
How can I lower my Debt-to-Income ratio?
Mathematically, there are only two ways to lower your DTI: decrease your debt or increase your income. Strategies include paying off a small loan entirely (the snowball method), avoiding taking on any new credit, increasing your hours at work, or picking up a side hustle.
Does DTI impact my credit score?
Surprisingly, no. Your Debt-to-Income ratio is not reported to credit bureaus and does not directly impact your FICO credit score. However, a high DTI usually correlates with a high "credit utilization ratio" (how much of your available credit you are using), which does heavily impact your credit score.