What Is Debt-to-Income Ratio (and Why It Decides Your Loan)?
It's the single number that quietly decides how much home you can buy. The good news: once you understand it, you can move it.
When a lender looks at your application, they're really asking one question: can you comfortably handle a new mortgage payment on top of what you already owe? The number they use to answer that is your debt-to-income ratio, or DTI. It matters more than most buyers realize, and it's one of the few things you can actually improve before you apply.
What It Actually Measures
Your DTI compares the money going out every month for debt against the money coming in before taxes.
"Gross" means your income before taxes and deductions. If you earn $6,000 a month before taxes and your required debt payments add up to $2,250, your DTI is 37.5%. That's it. The lower the number, the more room you have for a mortgage.
The Two Numbers Lenders Look At
Housing only
Just your future mortgage payment (principal, interest, taxes, and insurance) divided by your income.
All your debt
Your mortgage plus every other monthly payment: car, student loans, credit cards, and more. This is the one that matters most.
Most loan programs care most about the back-end number, because it shows your whole picture.
A Real Example
Say you earn $6,000 a month before taxes, and you're looking at a mortgage payment of about $1,500.
How the math works
$2,250 in total monthly debt ÷ $6,000 income = 37.5%. Comfortably inside most lenders' guidelines.
What's a Good DTI?
There's no single magic cutoff, and it varies by loan program, but here's the general landscape:
- ≤ 36%Strong. You'll have the widest set of options and the easiest approval.
- 37-43%Solid. Most conventional loans live comfortably in this range.
- 44-50%Still very workable on many programs, especially with good credit or reserves.
- up to 55%Possible on certain programs with compensating factors. This is where a broker earns their keep.
What Counts (and What Doesn't)
This trips people up constantly. DTI only includes debt, not your everyday living expenses.
Counts toward DTI
- Mortgage or rent (future payment)
- Car loans and leases
- Student loans
- Credit card minimum payments
- Personal and other loans
- Child support or alimony
Does not count
- Utilities and cell phone
- Groceries and gas
- Health insurance premiums
- Streaming and subscriptions
- Savings contributions
- Day-to-day spending
How to Improve It Before You Apply
Because DTI is a ratio, you can move it from either side. A few of the fastest levers:
Pay down a balance. Knocking out a car loan or a credit card can drop your ratio noticeably overnight. Avoid new debt. Financing a car or furniture right before you apply can quietly push you over the line, so hold off until after closing. Add income. A documented raise, a side income, or a co-borrower all count. Adjust the target. A slightly lower purchase price lowers the mortgage payment, which lowers the ratio.
Not sure where your number lands?
Tell us your income and your monthly payments, and we'll run your real DTI in a few minutes, then show you exactly what it means for your price range.