Something changed in the mortgage market this year, and it has nothing to do with the headline interest rate everyone keeps refreshing.
Lenders have quietly gotten pickier about debt-to-income ratio — the share of your monthly gross income that goes toward debt payments — and it's sinking applications that would have sailed through in 2021.
If you earn $7,000 a month before taxes and your proposed mortgage payment plus car loan, student loans, minimum credit card payments, and any personal loans total $3,150, your DTI is 45%.
That used to be workable at many lenders.
Now it's often the ceiling, and some loan programs want you under 43% or even 36%.
The reason is simple: when home prices and rates both climbed, lenders decided they didn't want to be the ones holding the bag if a borrower gets stretched.
A higher DTI means less cushion when a car dies, a medical bill lands, or a job changes.
Underwriters are paid to imagine your worst month, and lately they've been imagining harder.
What's tripping people up isn't usually the mortgage itself.
A $450 car payment, a $200 student loan payment, and $150 in minimum credit card payments adds $800 to your monthly debt load before the mortgage even enters the picture.
On a $90,000 household income, that's already 10.7% of your gross income gone.
There's a catch that surprises a lot of buyers: lenders use your minimum credit card payment, not what you actually pay.
If you charge $4,000 a month on a rewards card and pay it off in full, your credit report may still show a minimum payment of $100 or more.
That phantom payment counts against your DTI even though you never carry a balance.
Self-employed buyers and anyone with variable income get hit hardest.
Underwriters typically average your last two years of tax returns, and if you took big deductions, your "income" on paper can look far smaller than what actually hits your bank account.
A freelancer grossing $120,000 but showing $70,000 after write-offs is shopping in a completely different price range than they expected.
Paying down revolving balances helps twice, because it lowers both the minimum payment and the credit utilization that affects your score.
Avoiding new car loans, furniture financing, and "buy now, pay later" plans during the mortgage process matters more than most buyers realize — those installment plans can show up on credit reports.
And getting pre-approved before you fall in love with a house saves you from finding out about a DTI problem at the worst possible moment.
One more thing worth questioning: the 28/36 rule your parents quoted is closer to folklore than law.
Lenders vary widely, and government-backed loans sometimes allow DTIs above 45% with compensating factors like reserves or a strong credit score.
The real answer is "it depends on the lender," which is frustrating but honest.
It's also worth asking who benefits from tighter DTI standards.
Banks get lower default risk, which is genuinely good for the financial system.
But it also means fewer qualified buyers chasing the same inventory, which doesn't do much for prices and does push more people toward adjustable-rate products or longer terms to qualify.
Our take: DTI is the most underrated number in homebuying, and most Americans learn theirs only after a lender says no.
Final Thoughts
Check it yourself before you shop, and treat every new loan as something that could cost you the house.