Mortgage rates have cooled from their 2023 peaks, and buyers are finally crawling back into the market.
But plenty of well-paid Americans are still getting turned down, and the culprit often isn't their credit score.
It's a number most people have never checked: their debt-to-income ratio.
Lenders add up your monthly debt payments — car loans, student loans, minimum credit card payments, personal loans — and divide that total by your gross monthly income.
If you earn $7,000 a month and owe $2,100 in payments, your DTI is 30%.
Conventional lenders generally want that number at or below 36%, though many will stretch to 43%.
Cross 50%, and you're essentially locked out of a standard mortgage.
The tricky part is that lenders count the minimum payment on every card you hold, even ones with a zero balance if a statement posts.
A $12,000 student loan on an income-driven plan might get counted at 1% of the balance — $120 a month — regardless of what you actually pay.
Those phantom figures quietly inflate your ratio before a loan officer ever looks at your file.
Your projected mortgage payment — principal, interest, taxes, and insurance — gets added to your existing debts, then measured against income.
So a buyer with a 20% DTI from a car note and credit cards can blow past 43% once a $2,400 housing payment enters the equation.
That's the moment offers start falling apart, often after a buyer has already paid for inspections.
Paying down revolving balances moves the needle fastest, because credit card minimums are typically 1% to 3% of the balance — a $10,000 card can add $200 to $300 in counted debt every month.
Paying off a car loan or refinancing student debt into a lower monthly obligation can shave points off your ratio too.
And if you're close to the line, a larger down payment lowers the loan amount, which lowers the projected payment, which lowers your DTI.
Two things worth knowing before you apply.
First, Fannie Mae and Freddie Mac back loans up to 50% DTI in some cases, but those carry tighter credit and reserve requirements — they're not a loophole for everyone.
Second, FHA loans allow roughly 43% to 50% DTI with compensating factors, but the mortgage insurance premiums raise your monthly payment, which pushes the ratio right back up.
Most lenders pull credit and recalculate DTI within days of closing, so don't finance a car, open a store card for a furniture discount, or co-sign a relative's loan between your pre-approval and your closing date.
Even a small new obligation can tip a borderline file into denial, and a denied loan at that stage can cost you the house and your earnest money.
The bottom line: your income alone doesn't buy a house — the gap between what you earn and what you owe does.
Run the numbers yourself before a lender does, ideally months before you start touring homes.
Final Thoughts
A few hundred dollars in extra monthly debt reduction can be the difference between a pre-approval letter and another rejected offer in a market that's still tight on inventory.