The 43% line has quietly turned into the hardest number in American homebuying, and most shoppers only learn where they stand after a lender pulls their file.
Take every monthly debt payment you owe — car loan, student loans, minimum credit card payments, personal loans — and divide it by your gross monthly income.
That percentage is your debt-to-income ratio, or DTI.
Conventional loans generally cap it at 43%, though some lenders stretch to 45% or even 50% with compensating factors like strong reserves or a big down payment.
The problem is what's inside that number right now.
Credit card minimums have climbed as balances hit record highs, and card rates above 20% mean those minimums eat a bigger slice of income than they did three years ago.
Add a car payment that jumped several thousand dollars since 2021 and a student loan payment that resumed after the pandemic pause, and plenty of households that qualified in 2021 are now on the wrong side of the line.
FHA loans allow DTIs up to roughly 43% to 50% with compensating factors, and VA loans are more flexible still.
But "allowed" and "approved" are different things.
Underwriters want to see that you can absorb a surprise — a medical bill, a layoff, a furnace that dies in January — without missing the mortgage.
The fastest lever you control is the smallest balance.
Paying off a $60 monthly minimum on a card doesn't just free up $60; it can drop your DTI by a full percentage point or more, depending on income.
Paying down a car loan until it's gone works the same way, though the payoff is slower.
Lenders recalculate once that account reports a zero balance, so timing matters if you're shopping this spring.
First, they count only the mortgage they want, not the property taxes, insurance, and HOA dues that get baked into the payment.
Second, they co-sign for a relative's car or a kid's apartment and forget that the debt still lands on their own ratio.
If your DTI is above 43% and you're not ready to pay anything down, an FHA or VA loan may be the realistic path.
If you're between 36% and 43%, you're in the zone where a slightly smaller purchase price or a slightly bigger down payment can flip the answer.
And if you're under 36%, you have room — but not unlimited room, because the payment on the house you're buying hasn't been added yet.
One more move worth checking: some lenders will exclude a debt that has ten or fewer payments remaining, or that will be paid by someone else, if you can document it.
Ask before you assume you're disqualified.
Your DTI isn't a verdict on your worth as a borrower, it's a snapshot of your monthly obligations, and snapshots can be changed.
Pay down the smallest balance first, avoid new credit for six months before applying, and ask a loan officer to run your numbers before you fall in love with a listing.
The rules feel rigid, but they're arithmetic, not fate.
Final Thoughts
A few deliberate months of payoff can move you from "no" to "approved" faster than another year of saving for a bigger down payment.