Mortgage lenders have quietly shifted the goalposts, and the number that decides whether you get a house may not be the one you've spent years polishing.
It's your debt-to-income ratio, or DTI, and for a growing share of buyers it's the single biggest obstacle between a pre-approval letter and a set of keys.
Add up every monthly debt payment — car loan, student loans, minimum credit card payments, personal loans, plus the mortgage you're hoping to get.
Divide that by your gross monthly income before taxes.
If the result lands above roughly 43%, many lenders start backing away, and some loan programs cap it even lower.
The reason this stings right now is timing.
Credit card balances have climbed past $1.2 trillion nationally, auto loan payments have swollen with higher prices and rates, and student loan payments restarted for millions of borrowers.
Meanwhile, home prices and mortgage rates have stayed stubbornly high, so the projected payment on a median-priced home eats a far bigger slice of a paycheck than it did five years ago.
A household earning $6,000 a month with a $400 car payment, $250 in student loans, and $200 in card minimums is already carrying $850 in debt.
Add a $1,900 mortgage payment and the DTI hits about 46% — over the line for many conventional loans, even with a spotless credit score.
Lenders tighten DTI limits partly to reduce their own default exposure, and mortgage insurance companies and investors in mortgage-backed securities sleep better when loans stay conservative.
The trade-off is that perfectly responsible borrowers with high incomes but big car notes or student debt get filtered out anyway.
There's also a quieter incentive at work.
When buyers get priced out by DTI math, they don't vanish — they rent.
That pushes rents up, which pushes inflation readings up, which keeps the Federal Reserve cautious about cutting rates.
The whole loop makes affordability worse for everyone who doesn't already own a home.
Paying down revolving debt helps most, because card minimums are calculated on balances, so a smaller balance cuts your monthly obligation fast.
Paying off a car loan with a year left can drop your DTI by several points overnight.
Some buyers add a co-borrower, use a larger down payment to shrink the loan, or shop lenders who offer portfolio loans with looser DTI caps in exchange for higher rates.
Companies advertising "DTI repair" services are mostly charging for things you can do yourself in an afternoon with a spreadsheet and a phone call to your loan officer.
And be careful about stretching to the maximum allowed ratio — qualifying for a payment is not the same as comfortably affording one, especially with property taxes, insurance, and maintenance waiting on the other side of closing.
One more thing worth watching: as more buyers hit DTI walls, adjustable-rate mortgages and buydown deals tend to get marketed harder.
Those can work, but they shift risk onto you later.
Read the reset terms before signing anything.
The honest takeaway is that in this market, your debt load talks louder than your credit history.
Trimming monthly obligations before you house-hunt is boring, unglamorous, and probably the highest-return financial move available to most buyers right now.
Final Thoughts
The lenders aren't going to loosen up soon, so the leverage you actually control is on your side of the balance sheet.