If you've been house hunting this spring, you've probably noticed something strange: the house you can afford isn't the house the bank thinks you can afford.
That gap usually comes down to one number most buyers have never calculated — your debt-to-income ratio.
Mortgage rates have hovered near 7% for months, and home prices in many metros are still climbing.
When rates rise, lenders get pickier, and your DTI becomes the first box they check.
It's the share of your gross monthly income that goes toward debt payments.
Add up your minimum credit card payments, car loan, student loans, personal loans, and your estimated new mortgage payment.
Divide that total by your monthly pre-tax income.
Lenders generally want that number at or below 36% to 43% for a conventional loan.
Cross 43% and you're often pushed into stricter programs or denied outright.
FHA loans can stretch higher, sometimes into the low 50s, but you'll pay for it in fees and a higher rate.
Here's the part that's tripping people up in 2024 and 2025.
The same inflation that made groceries and rent painful also inflated credit card balances.
The Federal Reserve held rates high to fight that inflation, which pushed card APRs above 20% on average.
Higher minimum payments on bigger balances quietly wreck DTI calculations.
A household earning $6,500 a month with a $450 car payment, $300 in student loans, and $250 in card minimums already sits at roughly 15% DTI before a mortgage is even added.
A $1,800 housing payment pushes them to about 43% — right at the edge.
Paying down revolving balances does double duty: it lowers your minimum payments and improves your credit score.
Even knocking a $5,000 card balance down to $1,000 can shave real percentage points off your ratio.
Lenders pull your credit and verify income late in the process, sometimes days before closing.
Financing a car or opening a store card during escrow can blow up a deal that was already approved.
And don't assume a raise solves everything.
Raises help, but if you're carrying a car loan, a personal loan, and four credit cards, the math can still fail.
Lenders look at the whole picture, not just your salary.
One more thing worth knowing: DTI rules aren't one-size-fits-all.
Credit unions and portfolio lenders sometimes keep loans in-house and apply more flexible standards.
Online calculators give you a rough estimate, but only a loan officer can tell you what a specific program will accept.
If buying is on your radar this year, run your own numbers first.
Knowing your ratio before a lender does gives you time to fix it — and time is the one thing you can't buy back once you're under contract.
Our take: DTI isn't a punishment, it's a budgeting mirror.
If the number looks ugly, that's useful information, not a verdict.
Final Thoughts
Spend a few months shrinking balances and the door tends to open wider than you'd expect.