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Your debt-to-income ratio (DTI) is the percentage of your gross monthly income that goes to debt payments, and it is often the single most important number lenders look at, sometimes more than your credit score. A high DTI can get you rejected even with a 750 score, while a low DTI can help you qualify with a mediocre one. Most lenders want to see a DTI under 36%, and conventional mortgages typically cap it around 43% to 45%. Here is how to calculate and improve yours.
Key Takeaways
- DTI is your monthly debt payments divided by gross monthly income.
- Under 36% is healthy; conventional mortgages usually cap back-end DTI near 43% to 45%.
- Lenders use two versions: front-end (housing only) and back-end (all debt).
- Only two ways to lower it: raise gross income or eliminate whole debt payments.
What Is Debt-to-Income Ratio?
DTI is the share of your gross monthly income (before taxes) that goes to required minimum debt payments. The formula is total monthly debt payments divided by gross monthly income, times 100. For example, if you earn $5,000 a month and your payments are $1,200 mortgage, $350 car, $150 student loan minimum, and $80 credit card minimum, that is $1,780 total, for a DTI of 35.6%.
What Do Different DTI Levels Mean?
| DTI range | What it means | Mortgage eligibility |
|---|---|---|
| Under 36% | Healthy; most lenders are comfortable. | Easily qualifies for most mortgages |
| 36% to 43% | Acceptable but getting high. | Qualifies for most conventional loans |
| 43% to 50% | High; conventional approval gets hard. | May need FHA or special programs |
| Over 50% | Very high; most lenders decline new credit. | Typically disqualifies from a mortgage |
Calculate Your DTI
Use this calculator to find your ratio from your income and monthly debt payments:
Debt-to-Income Ratio Calculator
What Is Front-End vs Back-End DTI?
Mortgage lenders use two versions. Front-end DTI counts only housing costs (proposed mortgage payment, property taxes, homeowners insurance, HOA) divided by gross income, and most lenders want it under 28%. Back-end DTI includes all monthly debt plus the proposed housing cost, and this is the number most people mean by DTI. Conventional loans typically require back-end DTI under about 43% to 45%, while FHA loans can allow up to around 57% with compensating factors. See our guide on the credit score needed for a mortgage.
What Counts as Debt in the DTI Calculation?
Lenders include your mortgage or proposed mortgage payment, car loans, student loans, personal loans, minimum credit card payments, child support or alimony, and any other recurring obligation with a payment schedule. They do not include utilities, insurance (except as part of a mortgage), groceries, subscriptions, or general living expenses. For student loans in deferment or forbearance, lenders typically count about 0.5% to 1% of the total balance as a monthly payment even if you are not paying yet.
How Do You Lower Your DTI?
There are exactly two levers: raise gross income or cut monthly debt payments.
Increase income. A raise, second job, or side hustle improves DTI immediately. Adding $500 a month in gross income, same debts, drops the example above from 35.6% to 32.3%, which can be the line between qualifying and not.
Pay down debt strategically. Paying off a debt entirely removes its minimum from the calculation, but paying down a card balance does not lower DTI unless it cuts the minimum payment. So for DTI purposes, focus on eliminating whole accounts, starting with the one whose minimum is highest relative to its balance: a $500 balance with an $80 minimum helps DTI more per dollar than a $5,000 balance with a $100 minimum.
Avoid new debt before big applications. If you plan to apply for a mortgage in the next 6 to 12 months, take on no new debt. A car loan three months before a mortgage can add hundreds a month to your DTI and push you from qualifying to not, no matter your score. See our guide on how much credit card debt is too much.
FAQ
What is a good debt-to-income ratio?
Under 36% is healthy and comfortable for most lenders. Conventional mortgages usually cap back-end DTI around 43% to 45%, and FHA can stretch to about 57% with compensating factors.
How do I calculate my DTI?
Divide your total monthly minimum debt payments by your gross monthly income and multiply by 100. Use minimum required payments, not what you actually pay, and gross income before taxes.
Does my credit card balance affect my DTI?
Only through the minimum payment. Paying a balance down does not lower DTI unless it reduces the minimum, so eliminating whole accounts helps DTI more than shrinking balances.
Is DTI more important than credit score for a mortgage?
Often, yes. A high DTI can get you rejected even with excellent credit, while a low DTI can help you qualify with a weaker score. Lenders weigh both, but DTI determines whether you can afford the payment.
Bottom Line
DTI is your monthly debt divided by gross income, and keeping it under 36% (or at least under the ~43% conventional cap) is key to qualifying for a mortgage or loan. Calculate both your front-end and back-end ratios, eliminate whole debt payments to lower it, and avoid new debt before a major application. To go deeper, see our guides on the credit score needed for a mortgage, how much house you can afford, and how much credit card debt is too much.
This article is for educational and informational purposes only and is not financial advice. Lender DTI limits vary by loan type and program, so confirm current requirements with a licensed lender.
