Mortgage rates have cooled from their 2023 peaks, and more buyers are jumping back into the market.
But there's a number that matters just as much as the rate you lock in — and a lot of Americans have no idea where theirs stands.
Lenders use it to answer one question: after you pay everyone else, how much breathing room is left for a house?
Add up your monthly debt payments — credit cards, car loans, student loans, personal loans, plus the projected new mortgage payment.
Divide that total by your gross monthly income.
If you earn $7,000 a month and your debts total $2,800, your DTI is 40%.
Many conventional lenders prefer a DTI at or below 36%, though some programs allow up to 43% and even 50% in certain cases.
Cross those lines and you may get denied, offered a smaller loan, or pushed into a pricier product.
FHA loans tend to be more forgiving, but they come with their own trade-offs.
Credit card balances have climbed past $1.2 trillion nationally, and average card APRs remain near record highs above 20%.
Auto loan payments are heavier too, with the average new-car payment hovering around $700 a month.
Every one of those obligations eats into the mortgage room you have left.
So what can you actually do before applying?
Start by pulling your free credit reports and listing every monthly payment.
Then run your own DTI before a lender does — surprises at the underwriting stage cost time and sometimes the house.
Paying down a credit card or two can move the needle fast, especially if you knock out a smaller balance entirely.
Avoid financing a new car or furniture right before you apply, even if the store offers zero percent for a year.
Lenders count the minimum payment, not the promotional rate.
If your DTI is stubbornly high, consider adding a co-borrower with steady income, or shopping for a smaller loan amount.
In expensive metros, some buyers are looking farther out or at condos instead of single-family homes to keep the payment manageable.
One number worth knowing: Fannie Mae's latest data shows the average purchase loan borrower carries a DTI in the mid-30s.
That means millions of buyers are getting approved — they just planned ahead instead of winging it.
If you're paying $1,900 a month and trying to save for a down payment, your budget is already stretched.
That's exactly why lenders want to see the full picture before handing over a 30-year commitment.
The takeaway: your rate gets the headlines, but your DTI often gets the yes or no.
Know your number before you tour a single open house.
Our take: DTI is the most overlooked number in the homebuying conversation, and treating it like a checkup instead of a surprise is the smartest move a buyer can make this season.
Final Thoughts
A little math now beats a rejection letter later.