Mortgage rates get the headlines, but there's a less famous number doing just as much damage to homebuyers right now: your debt-to-income ratio.
Lenders use it to decide how much they'll let you borrow, and in a world of $400 car payments and $1,200 credit card balances, that math is getting ugly fast.
Add up every monthly debt payment — car loans, student loans, minimum credit card payments, personal loans — and divide it by your gross monthly income.
If you earn $6,000 a month and owe $1,800 in payments, your DTI is 30%.
Most conventional lenders want that number at or below 36%, with total housing costs capped around 28%.
The problem is what's happened to the denominators and numerators since 2021.
Grocery bills are up roughly 20% from four years ago, rent has climbed in most metros, and the average new car payment now sits above $700.
Those costs don't show up directly in DTI, but they eat the cash you'd need for a down payment and closing costs.
Meanwhile, credit card APRs are hovering near record highs, so any balance you carry makes your minimum payment look heavier on paper.
The result: a household that felt comfortably middle class in 2019 can now get rejected for a mortgage it would have easily qualified for.
Lenders haven't gotten stricter — the math just moved against you.
There's a second squeeze most buyers miss.
When the Federal Reserve holds rates high to fight inflation, it doesn't just make mortgages expensive.
It also pushes up rates on auto loans and credit cards, which raises your minimum payments, which raises your DTI.
So the same Fed policy that's supposed to cool prices can quietly knock you out of the housing market entirely.
A few practical moves: Pay down revolving debt first.
Credit cards hurt your DTI the most per dollar owed because minimum payments are calculated as a percentage of the balance.
Wiping out a $3,000 card can drop your DTI by a full point or two.
Financing a car or furniture six months before a mortgage application is one of the most common self-inflicted wounds.
Lenders can include side gigs, bonuses, and overtime if there's a two-year history.
Freelancers and 1099 workers often undersell themselves here.
Some FHA loans allow up to 43%, and certain programs stretch to 50% with compensating factors like cash reserves.
Even if your total DTI passes, lenders still look at housing costs alone.
A 45% total DTI with a 40% housing share will get flagged.
The bigger picture is that DTI has become a household budgeting tool whether you're buying a home or not.
If yours is creeping past 36%, you're not just less mortgageable — you're more exposed to any hiccup, from a layoff to a surprise medical bill.
One honest take: your DTI is a snapshot, not a verdict.
It can be improved in months, not years, by attacking the right debts in the right order.
Final Thoughts
But waiting for rates to fall won't fix it — the ratio follows you regardless of what the Fed does next.