Half of U.S. Mortgages Still Below 4% as New Borrowers Face Rates Above 7%

The 30-year fixed mortgage rate stood at 7.03% in late September 2026 — up from 6.95% a week earlier, according to Freddie Mac's Primary Mortgage Market Survey — while roughly half of all existing U.S. mortgages still carry rates of 4% or lower. That gap, now wider than at any point in recent memory, is the engine behind a housing market that has effectively seized up.

About half of all mortgages still carry rates of 4 percent or lower, and nearly 80% of outstanding loans have a rate below 6%.— Michael Barr, Federal Reserve Governor

Barr made those remarks on September 23, drawing on Federal Reserve Board staff calculations from the National Mortgage Database for the second quarter of 2026. He called the phenomenon the 'lock-in effect': owners holding cheap legacy loans have little reason to sell, which thins the supply of homes for everyone else. In tight markets, he said, the effect can raise prices.

The Federal Housing Finance Agency's data, analyzed by Wolf Street, fills in the granular picture. Mortgages with rates below 3% — mostly products of the Fed's near-zero interest rate policy from 2020 to 2022 — still account for 19.2% of all outstanding mortgages as of Q2 2026. That share has fallen by just one percentage point over the past year, from 20.2% in Q2 2025. The 3%-to-3.99% band holds another 29.9% of outstanding loans, down only 20 basis points in the quarter. Together, sub-4% mortgages represent nearly half the market, and the pace at which they are disappearing has essentially stalled.

The arithmetic of switching explains why. A household with a 4% loan that moves to a 7.03% loan pays a much larger share of each monthly payment as interest on the same balance, according to newsbreak.com. The 15-year fixed rate, which stood at 5.49% a year ago, has now risen to 6.42%, according to Freddie Mac's September 24 survey — meaning even the traditionally cheaper short-term option no longer offers relief.

The ultra-low rates that created this situation were themselves a product of deliberate Federal Reserve policy. From early 2020 through Q1 2022, the Fed purchased trillions of dollars of mortgage-backed securities and Treasury securities with newly created money, and cut its policy rate to near-zero, according to Wolf Street. That pushed mortgage rates to historic lows, which drove enormous demand for homes, causing home prices to rise by about 50% in two years in many markets. It also triggered a wave of refinancing into those low-rate mortgages — the very loans homeowners are now reluctant to give up.

The consequences for the broader market are measurable. Sales of existing homes have fallen by about 25% from pre-pandemic levels and have remained at those depressed levels for four years, according to Wolf Street. The Census Bureau's Housing Vacancies and Homeownership report for Q2 2026 put the homeowner vacancy rate at 1.2% — barely changed from 1.1% a year earlier — leaving few homes available for sale at any given moment, according to newsbreak.com.

Affordability for those who do try to buy has deteriorated sharply. The Atlanta Fed's Home Ownership Affordability Monitor fell to 68 in July 2026, its lowest reading in 21 years, according to newsbreak.com. A reading below 100 means a median-income family cannot afford a median-priced home at current rates. The lock-in effect contributes to that by keeping median prices elevated even as demand softens.

68% of prospective first-time buyers said they could not afford a down payment.— Michael Barr, Federal Reserve Governor, citing the Federal Reserve's 2024 household well-being survey

For that group, the rate on a seller's existing loan is not the immediate obstacle. The obstacle is a price set by a market where few sellers list, and a rate that adds to the monthly bill regardless. Barr also noted that property taxes rise with home prices, and that homeowners insurance has risen significantly in recent years, in part because of higher rebuilding costs — costs that fall on buyers and locked-in owners alike.

On the supply side of outstanding mortgages, the share carrying rates of 6% or higher has risen to 22.5% of all mortgages outstanding — the highest since Q2 2015 — up from just 7.3% in Q2 2022, according to Wolf Street. That reflects the wave of new originations at elevated rates since the Fed began tightening. The 5%-to-5.99% band has grown to 12.0%, its highest share since Q1 2020. Adjustable-rate mortgages remain a small slice at 4.3% of all outstanding loans.

Barr's proposed remedies — zoning reform, housing tax credits, adding to the overall stock of homes — aim to reduce the weight that any individual owner's decision to stay put places on the market. He also said additional monetary policy adjustments are likely to be needed, without specifying which. What he did not offer was a timeline: the speech leaves open how many owners with sub-4% loans will hold on for a full decade, and how many homes that keeps off the market in the meantime.

Wolf Street's analysis is blunt about the near-term outlook: life events — job relocations, deaths, divorces, growing families — will continue to force some sales, but that process has come to a near-halt, 'ensuring that the housing market will remain frozen.' With 15-year mortgage rates now also above 6%, even the option that once attracted buyers willing to take higher monthly payments for long-term savings has moved out of reach for many.

Why it matters — With half of all U.S. mortgages locked in below 4% and new loans above 7%, the gap is keeping millions of homes off the market, pushing prices higher, and pricing out first-time buyers — a cycle that Fed officials say will unwind only gradually, over years.

Reported by freddiemac.com, newsbreak.com, wolfstreet.com