If you're house hunting this spring, the number that matters most isn't your credit score or your down payment.
It's your debt-to-income ratio, and lenders are quietly enforcing it more strictly than they have in years.
Here's how it works: add up every monthly debt payment — car loans, student loans, minimum credit card payments, personal loans — then divide by your gross monthly income.
Conventional lenders generally want to see it at or below 43%, though many now prefer 36% to 41% for the best terms.
The squeeze is real for buyers in expensive metros.
On a $7,000 gross monthly income, a 43% cap means total debt payments can't exceed about $3,010.
Subtract a $450 car payment and $200 in credit card minimums, and you're left with roughly $2,360 for principal, interest, taxes, and insurance — which at today's rates buys a lot less house than it did three years ago.
Mortgage delinquencies have crept up from their pandemic-era lows, and lenders are pricing in more caution.
Fannie Mae and Freddie Mac still allow DTI up to 50% in some automated approvals, but those loans often carry higher rates or require bigger reserves.
Borrowers at 45% and above are increasingly getting counteroffers instead of clear-to-close letters.
The practical fallout: some buyers are paying down cards before applying, others are adding co-borrowers to boost household income, and a few are choosing adjustable-rate mortgages specifically because they're underwritten against the lower introductory payment.
Watch out for workarounds that create new problems.
Stretching your DTI with a cosigner can get you approved, but the debt stays on both credit reports.
Lender "compensating factors" — like six months of cash reserves — can push approval through at 45%, but that money is then locked up and unavailable for the roof repair you'll inevitably need.
There's also a quieter risk: as DTI thresholds bind, more buyers turn to non-QM and bank-statement loans.
Those products exist for good reasons, but they typically come with rates one to two points higher and prepayment penalties that can cost thousands if you refinance within three years.
If you're planning to buy in the next six months, pull your credit reports now and dispute errors before a lender does it for you.
Paying down a $3,000 card balance can move your DTI by two or three percentage points, which can be the difference between the house you want and the house you settle for.
One more thing worth checking: many lenders calculate DTI using the minimum payment on your statements, not what you actually pay.
If you've been overpaying a card for years, your official debt load may look heavier than your real one. **The takeaway:** DTI is a gatekeeping number, not a moral judgment, and it's the easiest one to move with a few months of planning.
Final Thoughts
Do the math before a lender does — and be skeptical of anyone selling you a stretch approval as a smart financial move.