Mortgage rates get the headlines, but there's a quieter number that can kill your home loan application before rates even matter: your debt-to-income ratio.
And with credit card balances near record highs and grocery bills still stubbornly elevated, that number is creeping up for millions of households.
Lenders add up your minimum monthly debt payments — credit cards, car loans, student loans, personal loans — and divide that by your gross monthly income.
If you bring in $6,000 a month and owe $300 on a car and $250 in minimum card payments, your DTI is about 9%.
The trouble starts when that percentage climbs.
Most conventional loans want your DTI at or below 43%, though some lenders stretch to 50% with compensating factors like hefty savings.
FHA loans often allow up to 43% to 50% depending on the lender and your credit profile.
Cross those lines and you're not just paying more — you may be denied outright, no matter how good your credit score looks.
Why this stings right now: the same inflation that pushed up your rent and groceries also pushed up your credit card balances.
The Federal Reserve's rate hikes made carrying that debt far more expensive, so minimum payments on variable-rate cards have grown.
A payment that was $75 two years ago might now be $110 — and that increase alone can shove a borderline DTI over the edge.
Say you earn $5,500 a month gross, and you're eyeing a $1,600 mortgage payment including taxes and insurance.
That's roughly 29% of your income, which sounds fine.
But add a $450 car payment, $200 in student loans, and $175 in card minimums — now your total DTI is about 44%.
That's the danger zone where lenders start asking hard questions or simply pass.
There's also a sneaky problem with how DTI treats your debts.
Lenders usually count the minimum payment on credit cards, not your actual balance.
Sounds generous, until you realize many issuers have been raising minimums.
And if you're carrying a $12,000 balance, even a 2% minimum is $240 a month — real money that eats your borrowing room.
Buying groceries on a card and paying it off monthly doesn't hurt your DTI, since lenders typically ignore balances paid in full.
But if you're revolving even part of that balance, it counts against you every single month.
Same story with "buy now, pay later" plans, which increasingly show up in underwriting.
Paying down revolving balances before you apply does double duty — it lowers your DTI and often lifts your credit score.
Avoid financing a car right before house hunting.
And if a raise or side income is coming, wait for it to show up on pay stubs before submitting your application, since lenders generally want to see it documented.
One more thing: don't open new credit cards mid-application.
A fresh account adds a minimum payment to your DTI and dings your credit.
Even a store card for 10% off can cost you far more in the long run.
If your DTI is already high, ask lenders about FHA or VA options, which can be more flexible.
A co-signer or a larger down payment can also help offset a shakier ratio.
Just know that every lender draws its own line, and getting a pre-approval doesn't mean you're safe — underwriting takes a second, harder look.
The takeaway is uncomfortable but useful: in this market, your mortgage chances are less about the rate you see advertised and more about the debt you're already carrying.
Knock down those balances now, and you'll have more room to buy later.
Our take: DTI is the most ignored number in personal finance until it slams a door shut.
Final Thoughts
Treat every minimum payment as a mortgage obstacle in disguise, and pay down revolving debt before you shop — not after.