Mortgage rates get all the headlines, but the number that actually decides whether you get a house loan isn't set by the Federal Reserve.
It's the percentage buried in your own bank statements — your debt-to-income ratio.
And right now, it's quietly shutting more buyers out than any rate hike.
Lenders add up every monthly debt payment you owe — credit cards, auto loans, student loans, personal loans, plus the estimated new mortgage payment — and divide it by your gross monthly income.
If you bring in $7,000 a month and owe $2,800 across all debts, your DTI is 40%.
Most conventional loans want that number at or below 36% to 43%.
Cross the line, and the answer is often no, regardless of your credit score.
A typical new mortgage payment now runs hundreds of dollars higher than it did three years ago, and that bigger payment alone can shove a previously approvable buyer over the threshold.
Add rising credit card balances — Americans have been leaning on plastic to cover groceries and gas — and the debt side of the equation is climbing at the same time the payment side balloons.
Fannie Mae and Freddie Mac allow DTIs up to 50% in some cases, but only when compensating factors kick in: strong cash reserves, a long employment history, or a high credit score.
Freddie's automated system can greenlight that ceiling, but lenders often layer on their own stricter "overlays" anyway.
Translation: the official limit and what your loan officer will actually approve are two different numbers.
Pay down revolving balances first — credit cards count at their minimum payment, so killing a $3,000 balance can drop your DTI by a full percentage point or more.
Avoid financing a car or furniture in the six months before a home purchase.
And if you're self-employed or have variable income, expect extra scrutiny; lenders may average your last two years of earnings, which can lower the income figure they use.
FHA loans offer more room, often accepting DTIs near 43% and sometimes higher with documented compensating factors, but they come with mortgage insurance premiums that raise your monthly cost.
VA loans for veterans can stretch even further.
The trade-off is real: a higher DTI loan usually means less financial cushion if a job loss or medical bill hits.
One more trap: pre-approval isn't a guarantee.
Lenders re-pull your credit and recheck income days before closing.
Buy a truck after you're pre-approved and you can lose the house — it happens constantly.
Our take: DTI is the most underrated number in personal finance, and most buyers don't calculate it until a lender does it for them.
Run the math yourself today, before you tour a single open house.
Final Thoughts
Knowing your ratio gives you leverage to fix it on your timeline instead of scrambling after a rejection.