The 50-Year Mortgage Treats a Housing Shortage as a Payment Problem

Bill Pulte, director of the Federal Housing Finance Agency, called the 50-year mortgage “a complete game changer”^[1] on November 8. President Trump played it down on Fox News as “not even a big deal” that “might help a little bit.” The president has the size right. The trouble is the target. A 50-year mortgage treats a shortage of houses as a problem of monthly payments: it stretches the loan to fit a price that scarcity set, and it adds no homes. The typical first-time buyer is now 40, the oldest on record,^[2] so a 50-year loan taken out at that age would run until 90.

Take a buyer who pays September’s median existing-home price of $415,200^[3] and puts down 10%, the median for first-time buyers.^[2] Freddie Mac’s^[4] average 30-year fixed rate was 6.24% in the week of November 13. On the $373,680 loan, a 30-year mortgage costs $2,298 a month in principal and interest, and a 50-year loan at the same rate costs $2,034, a saving of $265. Lenders would charge more for money lent 20 years longer: Redfin assumes^[5] half a percentage point more, which cuts the saving to $124, and UBS expects the extra spread to “consume a significant portion of the monthly payment savings.”^[6] What changes most is equity, because early payments go mostly to interest, and on the longer loan almost entirely. Measure both loans over 11 years, the median time sellers had spent in their homes in NAR’s 2025 survey.^[2] By then the 30-year borrower has repaid 18% of the loan and the 50-year borrower, at the higher rate, 4%, which makes the longer loan nearly interest-only. With prices flat, that leaves $108,700 of equity against $56,200, nearly three-quarters of which is the original down payment.

Home equity on a $415,200 home bought with 10% down, by loan term

Allison Schrager^[7] of the Manhattan Institute makes the best case for the loan. In Fortune’s summary of her column,^[1] owners who sell early get less value, but that “may be a worthwhile tradeoff” for a buyer who needs or wants a lower payment. A buyer who expects rents to keep rising might rationally lock in a payment and accept slow equity, and nobody would be forced to take the loan. For an owner who sells after 11 years, the $477,000 of extra interest over the higher-rate loan’s full term is beside the point. I accept those points. They still leave that owner a real bill and a thin cushion. Over 11 years, the 50-year borrower pays $16,400 less but owes $52,400 more at the sale: about $36,000 of extra interest, $15,100 of which would remain even at equal rates because the balance falls so slowly. With prices flat, that borrower’s equity is then 13.5% of the home’s value, against 26.2% on the 30-year loan, so a 13.5% fall in prices would erase it before a dollar of selling costs. The Case-Shiller national price index^[8] fell 26% from 2007 to 2012 and did not regain its peak until late 2016. Dismissing the full term assumes the owner can sell on schedule, and that is a bet on the market, not a feature of the loan.

A loan can suit its borrower and still be bad housing policy, because its wider cost would fall on buyers who never take it. Borrowers who manage to a monthly payment turn a longer term into a bigger loan. In a study of 500,000 used-car loans, Bronson Argyle, Taylor Nadauld and Christopher Palmer^[9] found demand more sensitive to loan length than to the interest rate, and many borrowers spent payment savings on larger loans. In housing, extra borrowing power shows up in prices. When branching deregulation from 1994 to 2005 expanded mortgage credit, Giovanni Favara and Jean Imbs^[10] found that house prices rose, and rose less where supply was elastic, because the housing stock grew instead. Realtor.com put the country’s housing shortfall at 3.8 million homes^[11] in 2024. In that market a longer loan is what Joel Berner^[12] of Realtor.com calls “essentially a subsidy for housing demand,” and where supply cannot respond, a subsidy ends up in the price.

The better route to a smaller payment is a house that is cheaper to build, not a loan that takes longer to repay. That is work for statehouses and city halls:^[13] rules that let owners build up instead of out, apartments allowed by right on lots now reserved for detached houses, and a deadline on every permit decision. The fix has a cost. A homeowner on a street of detached houses has a real stake, from resale value to the feel of the neighborhood, in whether a five-story building rises beyond the property line. That owner deserves an answer at a zoning hearing. A 50-year mortgage skips the hearing, and as long as supply stays short, the next buyer pays for it in the price.