Mortgage rates have been bouncing around in the mid-6% range for months, and plenty of buyers have adjusted their budgets accordingly.
But there's a quieter number that can sink a home loan application before rates even matter: your debt-to-income ratio.
Lenders use it to answer one blunt question — after paying everyone else, can you actually afford this house?
Add up your monthly minimum payments on credit cards, car loans, student loans, and any other installment debt.
Divide that total plus your expected new mortgage payment by your gross monthly income.
That percentage is your DTI, and most conventional lenders want it at or below 43%.
Some government-backed loans allow higher, but crossing 50% is where applications tend to die.
Here's where it gets uncomfortable for a lot of households.
A $6,000 monthly income with a $400 car payment, $150 in student loans, and $200 in credit card minimums already carries $750 in debt before a mortgage enters the picture.
Adding a $1,800 house payment pushes DTI to 42.5% — technically workable, but with almost no room for error.
A single emergency vet bill or car repair can tip the whole thing over.
Even if you pay your balance in full every month, lenders generally count the minimum payment shown on your statement.
Someone carrying four cards with $75 minimums each is lugging $300 of "invisible" debt into the application, regardless of whether they actually pay it off.
Paying those balances down before applying — and keeping them down through closing — can move the needle more than shopping for a lower rate.
There's also a timing trap most buyers miss.
Lenders pull your credit again right before closing, and new debt taken on during the process can blow up an approval.
That furniture financing you opened after getting pre-approved?
So does cosigning a family member's car loan, which many people don't realize shows up on their report as a full obligation.
If your DTI is too high right now, the fix usually isn't dramatic.
Paying off a small installment loan, refinancing a car note to a lower payment, or waiting for a raise can all shift the ratio.
Some buyers add a co-borrower with steady income, which effectively raises the denominator.
Others simply target less expensive homes — a lower purchase price shrinks the mortgage payment, which is the biggest single number in the equation.
It helps to know where you stand before a lender tells you.
Pull your credit report, list every minimum payment, and run the division yourself.
Buyers who walk into pre-approval already knowing their number tend to negotiate from a stronger position and waste less time touring homes they can't finance.
The bottom line: your DTI is less about how much you earn and more about how much you've already promised to everyone else.
Getting it into shape before house hunting beats scrambling after a rejection.
Final Thoughts
In a market where rates already stretch budgets, that ratio may be the most fixable obstacle standing between you and a set of keys.