Your debt-to-income ratio is one of the first numbers a lender looks at, and one of the least understood. In plain English, it compares the money you owe each month to the money you bring in. Here is what it actually measures, which debts count, and what you can do about it before you apply.
What the ratio actually is
Your debt-to-income ratio, DTI for short, is a simple comparison: your recurring monthly debt payments divided by your gross monthly income, the amount you earn before taxes. Lenders use it to answer one question: after your regular obligations, how much room is left for a house payment?
Lenders actually look at two versions of the ratio. The first covers just the housing side: the proposed mortgage payment, including principal, interest, property taxes, homeowners insurance, and any HOA dues. The second adds everything else you owe, car payments, student loans, credit cards, the whole picture. Both matter, and the second one is usually the one that decides the conversation.
Which debts count
The list is shorter than most people think. What counts:
- The proposed mortgage payment itself, with taxes, insurance, and HOA dues included.
- Car loans and leases.
- Student loans.
- Minimum payments on credit cards and other revolving accounts.
- Personal loans and other installment debts.
- Alimony, child support, and other court-ordered payments.
What does not count:
- Utilities: water, power, gas, garbage.
- Car insurance, cell phone, cable, and streaming.
- Groceries and everyday living expenses.
This surprises people. Two households can have identical take-home pay and very different ratios, not because one spends more, but because one carries more of the debts that count. That is the part you have control over.
Why lenders care
The ratio is one of the clearest signals of whether a payment will fit. A borrower with a lot of obligations relative to income is carrying more risk, and the loan gets priced and structured around that. A borrower with a comfortable ratio has more room, which usually shows up in both approval and pricing.
Here is the honest part: the exact cutoff is not a magic number you need to memorize. Different programs have different limits, and a strong credit profile or a larger down payment can change what is possible. What you can control is the shape of your own numbers.
What to do before you apply
- Pay down revolving balances. Credit cards are usually the fastest lever, because lowering the balance lowers the minimum payment that counts against you.
- Avoid new debt. A car loan or a new credit card in the months before applying changes the ratio at the exact moment you want it to look its best.
- Do not close old cards. Closing accounts can change your credit picture in ways that do not help you.
- Consider a co-borrower. Adding a spouse or partner with income can strengthen the picture, when that is the right decision for both of you.
- Think about the down payment. A larger down payment means a smaller loan, which means a smaller proposed payment, which improves the ratio on the housing side.
The point of the exercise
The ratio is a tool, not a verdict. Its job is to make sure the payment you take on is one you can carry, month after month, without squeezing the rest of your life. That is the same standard I have used for 22 years: the numbers should fit the life you actually want to live, not the maximum the math allows.
Let’s look at the numbers. Book a call with Jeff or send a message, and we will walk through your income, your debts, and what they mean for the home you want. No pressure to move faster than you are ready.