Mortgage rates have spent two years bouncing between frustrating and brutal, and buyers have spent just as long obsessing over them.
But lenders say the number quietly killing more applications right now isn't the rate at all.
It's your debt-to-income ratio — the share of your monthly gross income that goes toward debt payments.
Add up your minimum monthly payments: car loan, student loans, credit cards, personal loans, plus the projected mortgage payment including taxes and insurance.
Divide that total by your gross monthly income before taxes.
That percentage is your DTI, and it decides far more than most buyers realize.
Most conventional loans today will approve you up to 43%, and some programs stretch to 45% or even 50% with compensating factors like strong credit or extra cash reserves.
Cross that line and you're not negotiating a worse rate — you're getting a denial letter.
Because home prices and rates rose together.
A payment on a median-priced home now eats a much bigger slice of a typical paycheck than it did in 2019, so buyers have less room left over before they hit the ceiling.
Rising credit card balances and resumed student loan payments squeeze the same budget from the other side.
The good news: DTI is one of the few mortgage numbers you can actually move before you apply.
Paying down a credit card doesn't just shrink the balance — it cuts the minimum payment, which is what lenders count.
A $50 lower minimum can be worth tens of thousands in borrowing power.
First, don't open a new car loan or finance furniture in the months before applying; that payment follows you straight into the calculation.
Second, ask about paying down debt to get under a threshold rather than scraping together a bigger down payment.
Loan officers confirm that crossing from 44% to 42% can flip a rejection into an approval, sometimes at a better price.
One caution: lenders won't count all your income.
Side gigs, freelance work, and bonuses often need a two-year history before they count fully.
If a chunk of your pay is variable, run your DTI using only your base salary so there are no surprises.
FHA loans are more forgiving on credit scores but still cap DTI around 43% to 50% depending on the lender and your profile.
VA loans are famously flexible, but even there, underwriters want to see residual income after debts are paid.
If you're years from buying, the play is boring but effective: keep balances low, avoid new installment debt, and let your income history mature.
If you're buying this year, get pre-approved early and ask the loan officer to show you your exact DTI with and without each debt.
Rates get the headlines, but your debt load decides whether you get to the closing table at all.
Final Thoughts
Shrink the minimums, protect the income documentation, and treat that percentage like the gatekeeper it has become.