Mortgage rates get all the headlines, but there's a quieter number that can sink your home loan application before a lender ever looks at your credit score.
It's called your debt-to-income ratio, or DTI, and it's quietly becoming one of the biggest hurdles for American buyers in 2024 and 2025.
Your DTI is the percentage of your gross monthly income that goes toward debt payments — things like your car loan, student loans, minimum credit card payments, and the mortgage you're hoping to get.
If you earn $6,000 a month and owe $1,800 in total debt payments, your DTI is 30%.
Most conventional lenders prefer a DTI at or below 36%, though some government-backed loans like FHA and VA allow ratios up to 43% or even higher with compensating factors.
Cross that line, and you can be denied — even with a sparkling credit score and a healthy down payment.
Grocery bills are still running roughly 25% above pre-pandemic levels, auto loan payments hit record highs last year, and credit card balances topped $1.2 trillion.
All of that shows up in your DTI, and it doesn't care that your rent also went up.
First, pay down revolving debt before you apply.
Credit cards hurt your DTI more than almost anything else because lenders count the minimum payment, not the balance.
Knocking out a $4,000 card balance might only free up $100 a month, but that $100 can move your ratio by a full percentage point or two — sometimes enough to flip a denial into an approval.
Second, think twice before financing a car or taking a personal loan in the six months before you house hunt.
Lenders pull your credit and recalculate your DTI at the finish line, so a new $500 monthly payment can blow up a deal you'd already qualified for.
A spouse or partner with steady income and low debt can pull your combined ratio down fast.
Just know that their debts count too — and so does their credit history.
A larger down payment, cash reserves, or a long history of on-time payments can sometimes push an approval through at 45% or 50% DTI.
One more thing: don't assume a pre-approval is final.
Lenders re-verify income, debts, and assets days before closing.
Job changes, big purchases, or a new financed couch can all derail things at the eleventh hour.
If you're years away from buying, the play is boring but effective — chip away at balances, avoid new debt, and let your income grow.
A DTI that looks hopeless at 48% today might look solid at 38% in 18 months. **Our take:** DTI is the most ignored number in the homebuying conversation, and that's a mistake.
Rates matter, but your ratio decides whether you get to the table at all.
Run the math before a lender does it for you — and if the numbers don't work yet, wait.
Final Thoughts
Rushing into a loan you can barely carry is how buyers become sellers.