Imagine you bought or refinanced your home a few years ago and locked in a mortgage rate of 3.25%.
Today, you would love to move.
Maybe you need another bedroom. Maybe the kids have moved out and you want to downsize. Maybe you have a new job, want to move closer to family, or simply want a different house.
There’s just one problem.
You don’t want to give up that 3.25% mortgage.
With today’s mortgage rates considerably higher, moving could mean replacing an incredibly inexpensive mortgage with one costing hundreds—or even thousands—of dollars more each month.
So you stay.
Millions of American homeowners are facing some version of this decision. Economists call it the mortgage rate “lock-in effect.”
But what if you didn’t have to give up your mortgage?
What if you could take it with you?
That’s the idea behind a portable mortgage—and what sounded fairly theoretical a year ago is now being seriously discussed in Washington.
What Is a Portable Mortgage?
A portable mortgage allows a homeowner to sell one property and transfer some or all of the existing mortgage—including its interest rate and other terms—to another property.
For example:
You owe $250,000 on a mortgage at 3.25%.
You sell your current home and purchase another one.
Instead of paying off that mortgage and borrowing the entire amount again at today’s rates, imagine being able to move that $250,000 mortgage—and its 3.25% rate—to your next home.
That’s portability.
It isn’t a new concept.
Canada, for example, already has mortgages that may be portable. The Canadian government describes portability as the ability to transfer an existing mortgage balance, interest rate, terms and conditions when selling one home and buying another. Eligibility and restrictions depend on the lender and mortgage contract.
But the Canadian mortgage market is very different from ours.
And that’s where this gets interesting.
This Is No Longer Just an Idea
In November 2025, Federal Housing Finance Agency Director Bill Pulte said the agency was evaluating ways for Fannie Mae and Freddie Mac to offer assumable or portable mortgages.
Congress has since taken the idea further.
In March 2026, Representative Tom Barrett introduced the Take Your Rate Act of 2026 (H.R. 7754).
The bill would require the Department of Housing and Urban Development and the Federal Housing Finance Agency to jointly study mortgage portability for federally backed mortgages.
Importantly, the proposed study asks many of the same questions the mortgage industry should be asking:
- Can this actually be administered?
- What would it do to the housing market?
- What regulations would have to change?
- How many homeowners would benefit?
- What would it cost the federal government?
- What would it mean for Fannie Mae, Freddie Mac and the mortgage-backed securities market?
- Would Congress need to change existing laws?
- Should the government first test portability through a limited demonstration program?
Then, on August 3, 2026, Representative Tom Kean Jr. introduced an even more aggressive proposal: the Making Ownership Viable for Everyone Act, or MOVE Act.
Rather than simply studying portability, the proposed legislation would direct Fannie Mae and Freddie Mac to begin purchasing and securitizing qualifying portable conventional mortgages within 180 days after enactment.
Under the proposal, a homeowner could transfer the interest rate, terms and remaining balance of the mortgage to a new property within 90 days of selling the original property.
Neither proposal means portable mortgages are available today.
They aren’t.
But the conversation has clearly moved from “Could America ever do this?” to “How would America do this?”
And that’s a significant change.
Why Is Washington Even Considering This?
Because America’s 30-year fixed-rate mortgage created an unusual problem after rates rose sharply beginning in 2022.
Millions of homeowners had already locked in extraordinarily low mortgage rates.
When rates increased, selling their homes suddenly became expensive.
Federal Housing Finance Agency research estimated that mortgage rate lock-in prevented approximately 1.33 million home sales between the second quarter of 2022 and the fourth quarter of 2023.
Federal Reserve researchers separately estimated that mortgage lock-in accounted for 44% of the decline in mortgage-borrower mobility from 2021 to 2022.
More recent research continues to find significant effects on homeowners’ willingness to move.
That’s the problem portable mortgages are attempting to solve.
But solving one problem could create several others.
Question #1: Who Pays for That 3% Mortgage?
This may be the biggest question.
The American mortgage system works in large part because mortgages are bundled into mortgage-backed securities and sold to investors.
Suppose an investor owns an investment backed by mortgages paying roughly 3%, while newly issued mortgages are paying substantially more.
Normally, as homeowners sell, refinance or pay off those mortgages, that older capital gets returned and can eventually be reinvested at current market rates.
Portability could change those assumptions.
If homeowners could repeatedly transfer older, below-market mortgages from property to property, investors could receive those lower yields longer than originally anticipated.
That could affect how investors value mortgage-backed securities.
And if investors demand additional compensation for that risk, the cost could eventually appear somewhere else in the system—including potentially in the pricing of future mortgages.
That’s one of the reasons implementing portability isn’t as simple as changing a sentence in a mortgage document.
Question #2: What Happens When Someone Buys a More Expensive Home?
This may be the most practical issue.
Let’s go back to our homeowner who owes $250,000 at 3.25%.
Suppose the next home requires a $400,000 mortgage.
What happens to the additional $150,000?
There are several possibilities.
The homeowner might keep:
$250,000 at 3.25%
and borrow:
$150,000 at the current market rate.
Another possibility would be some type of blended rate combining the old mortgage and new money.
Or perhaps the additional financing would function more like a second mortgage.
Each solution creates different questions involving underwriting, lien position, servicing, securitization and pricing.
Until actual program rules exist, nobody knows exactly how this would work.
Question #3: Would Existing 2% and 3% Mortgages Qualify?
This is the question homeowners will probably care about most.
Would portability apply only to mortgages originated after a new program begins?
Or could someone who obtained a 2.75% mortgage in 2021 suddenly make that mortgage portable?
Those are two very different programs.
Making existing mortgages portable would potentially provide an enormous benefit to millions of homeowners—but it could also substantially change the economics of mortgages that investors purchased years ago under completely different assumptions.
That makes retroactive portability considerably more complicated.
Question #4: Would You Still Have to Qualify?
Probably—but we don’t know what those rules would ultimately look like.
Your mortgage may be moving with you, but the collateral securing that mortgage is changing completely.
There is a new house.
A new appraisal.
Different property taxes.
Different homeowners insurance.
Possibly a different loan-to-value ratio.
Your income, employment, credit and debts may also have changed since you obtained the original mortgage.
Someone will have to determine whether the borrower and the new property still meet the required guidelines.
Portability doesn’t necessarily eliminate underwriting.
It changes what is being underwritten.
Question #5: What Happens to Home Prices?
This is where I think the conversation gets particularly interesting.
At first glance, portable mortgages sound like an obvious way to increase housing inventory.
Homeowners who feel trapped by their low mortgage rates might finally put their homes on the market.
More sellers means more homes available for buyers.
That’s good.
But remember something important:
Most of those sellers become buyers.
Unlock 500,000 homeowners from their existing homes and you haven’t necessarily created 500,000 additional homes.
You may have created hundreds of thousands of additional sellers—and hundreds of thousands of additional buyers.
Research on mortgage lock-in suggests that removing the effect could increase mobility and transactions significantly. But the ultimate effect on prices would depend on local inventory, new construction, the types of homes people are leaving and the types of homes they want to purchase.
In some markets, additional inventory could help buyers.
In others, the additional purchasing power created by low portable rates could increase competition and push prices higher.
So portable mortgages may help mobility considerably more than they help affordability.
Those aren’t necessarily the same thing.
And Then There Are the Details Nobody Talks About
Think back to the last mortgage closing you attended.
Remember the stack of documents?
Your mortgage is secured by a particular property. There are title requirements, appraisal requirements, insurance requirements, servicing agreements, investor requirements, disclosures and dozens of other legal and financial considerations.
Now remove one house from the transaction and replace it with another while attempting to preserve the original mortgage.
What happens if the original lender no longer exists?
What happens if the loan has been sold several times?
What if the current servicer is different?
What if the new property is in another state?
What if the borrower moves from a single-family home to a condominium?
What if the borrower needs significantly more—or less—money?
What happens to mortgage insurance?
What happens when the existing loan is FHA, VA or USDA?
And perhaps most importantly:
Who absorbs the financial cost of preserving a 3% mortgage when the market is demanding 6% or 7%?
Those aren’t reasons the idea can’t work.
They’re reasons this needs to be carefully designed before it does.
So, Are Portable Mortgages Coming?
Maybe.
But we’re not there yet.
As of August 2026, portable mortgages are not a broadly available feature of the traditional U.S. mortgage market.
What has changed is the seriousness of the discussion.
FHFA has publicly explored the concept. Congress now has legislation calling for a formal study, and another newly introduced bill would go substantially further by directing Fannie Mae and Freddie Mac to purchase and securitize portable mortgages.
That doesn’t guarantee anything becomes law.
But it does make this an issue worth watching.
What I Would Be Doing If I Were a Real Estate Agent
I wouldn’t wait for Congress to decide what happens.
I would start building a list today.
Go through your past clients and identify homeowners who would probably move if they didn’t have to surrender their existing mortgage rate.
Ask them one simple question:
“If you could take your current mortgage rate with you to your next house, would you consider moving?”
Some will say no.
But I suspect quite a few will say:
“Absolutely.”
Keep that list.
Because if some version of mortgage portability eventually becomes reality, those homeowners could become one of the most valuable groups of future buyers and sellers in your database.
You’ve still identified homeowners who want to move and discovered the single biggest obstacle preventing them from doing it.
That’s valuable information either way.
Dave Henry NMLS# 272168
Sources & Further Reading
Take Your Rate Act of 2026 (H.R. 7754) — Proposed legislation requiring HUD and FHFA to study the feasibility and potential consequences of portable federally backed mortgages. https://www.govtrack.us/congress/bills/119/hr7754
Making Ownership Viable for Everyone (MOVE) Act — Introduced August 3, 2026; would direct Fannie Mae and Freddie Mac to begin purchasing and securitizing qualifying portable conventional mortgages. https://www.congress.gov/bill/119th-congress/house-bill/10028/text
Federal Housing Finance Agency — The Lock-In Effect of Rising Mortgage Rates — Research examining how low existing mortgage rates have affected housing supply, mobility and home prices. https://www.fhfa.gov/research/papers/wp2403
Federal Reserve — Locked In: Mobility, Market Tightness, and House Prices — Research examining the relationship between mortgage rate lock-in, homeowner mobility and housing-market conditions. https://www.federalreserve.gov/econres/feds/locked-in-rate-hikes-housing-markets-and-mobility.htm
National Bureau of Economic Research — Unlocking Mortgage Lock-In — May 2026 research examining how mortgage lock-in affects housing supply, demand, mobility, prices and rents. https://www.nber.org/papers/w35237
Financial Consumer Agency of Canada — Portable Mortgages — Explanation of how mortgage portability currently works in Canada.
This article is for educational purposes and discusses proposed legislation and potential mortgage programs. Program availability, eligibility and guidelines are subject to change.
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