The Loan Changes Owners
Assumable loans are the closest thing the housing market has to a time machine.
The idea is simple. When you assume a mortgage, you take over the seller's existing loan instead of getting a new one. Same interest rate, same remaining balance, same remaining term.
The seller walks away from the debt, you step into it, and the rate they locked in years ago becomes your rate.
Why that matters right now comes down to two numbers. The 30-year fixed mortgage averaged 6.58% for the week ending July 23, 2026 (Freddie Mac). The record low was 2.65% the week of January 7, 2021 (Rocket Mortgage).
Millions of people signed loan documents in that window and are still paying those low rates today. Nearly half of all outstanding U.S. mortgages, 49.9%, carry a rate of 4% or lower, and 19.5% sit below 3% (FHFA data via Wolf Street).
Meanwhile the long end of the bond market has gone the other direction. The 30-year Treasury yielded 5.107% today, and the 10-year sat around 4.62% after touching 4.7% on July 23, its highest reading going back to January 2025 (CNBC).
Mortgage rates track the long end, so a pre-pandemic or early-pandemic loan is a genuinely scarce asset now.
The reason most loans cannot be transferred goes back to the Garn-St Germain Depository Institutions Act of 1982, which let lenders nationwide enforce due-on-sale clauses and call a loan due when the property changes hands (12 U.S.C. 1701j-3).
Government-backed loans never carried those clauses, which is why they survived as the assumable exception.
Here is the strange part. Out of roughly 8.1 million active FHA loans representing $1.6 trillion in unpaid principal (HUD) and close to 4 million active VA loans (VA), only 5,861 FHA assumptions were completed in fiscal 2024.
That is up from 2,549 in 2021, an increase, but still less than could be expected (HUD data via Fast Company).
Realtor.com found that only about 0.4% of active listings in 2024 advertised an assumable loan at all (Realtor.com).
The supply exists. Almost nobody is asking for it.
