A Realtor.com analysis of 1.35 million loans shows that credit score, down payment and lender choice shape real borrower rates
As mortgage rates climbed to 7.28%, its highest level in nearly three years, a new Realtor.com analysis finds that the headline figure is only part of the affordability equation. The actual rate a borrower receives is determined, in large part, by choices made before and during the loan process.
The report draws on Freddie Mac's Single-Family Loan-Level Dataset, examining 1.35 million purchase loans originated from January 2023 through December 2025.
In any given month, the middle 80% of borrowers received rates spanning 93 basis points. On a $2,000 monthly principal-and-interest budget, that spread represents roughly $28,400 in home price, a range wider than most three-month movements in the headline rate over the same period.
"Mortgage-rate headlines matter, but they are not the whole story," said Jake Krimmel, senior economist at Realtor.com.
"Our report finds that borrowers' actual rates vary widely even within the same month, and that the gap between a typical outcome and a strong one can translate into tens of thousands of dollars in purchasing power. A buyer's credit profile, down payment and lender choice all help determine where they land within that range."
Michael Brenning, chief operating officer at eLend, says rapid swings in Treasury yields are forcing lenders to reprice loans multiple times a day, adding complexity to rate locks, margins, and borrower affordability.https://t.co/rjfKz690Ga
— Mortgage Professional America Magazine (@MPAMagazineUS) October 1, 2026
How credit score thresholds move the needle
Credit score had the largest independent effect on borrower rates in the study.
Moving from the mid-680s to 720 was associated with an 11-basis-point rate improvement, worth approximately $3,200 in buying power on a $2,000 monthly budget.
The full climb from below 640 to 780-plus corresponded to a 32-basis-point reduction, translating to roughly $10,100 in additional home price.
"Buyers who have time before they plan to purchase should focus on the credit-score thresholds that matter most, especially 700 and 720," Krimmel said.
"Even a move from the high 600s to 720 can improve the rate a buyer is likely to receive and expand the home budget available to them."
Why comparison shopping may be the fastest lever
For buyers who cannot wait on credit improvement, lender comparison delivers the most immediate result.
In 2025, mortgage brokers and correspondent lenders priced approximately 5 to 6 basis points below retail lenders on average, after controlling for borrower characteristics and geography.
Within the retail channel alone, the gap between a very competitive lender and a typical one reached 19 basis points, worth roughly $5,800.
Down payment strategy also plays a role, though not always as buyers expect.
Moving from between 15% and 19% down to exactly 20% produces only a 0.7-basis-point rate improvement.
The real financial benefit at that threshold is eliminating mortgage insurance, a reminder that rate is one component of total monthly housing cost, not the whole calculation.
"For buyers who are ready to move now, comparison shopping is the clearest opportunity," Krimmel said.
"A strong lender offer can be worth roughly twice as much as moving from a 690 to a 720 credit score, and it is available immediately for buyers who are able to search. Buyers should seek multiple loan estimates, compare the full terms — not just the advertised rate — and give themselves enough time to choose the lender that best fits their needs."
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