Could Your Mortgage Rate Move With You?

The proposed MOVE Act could make certain conventional mortgages portable. That sounds simple. The questions behind it are not.

Some homeowners are not staying because their house still fits. They are staying because their mortgage does.

A rate secured several years ago may be too valuable to leave behind, even when the home itself no longer works. The family needs another bedroom. The empty nesters would prefer less house and less maintenance. A job opportunity requires a relocation. In each case, moving may mean replacing a historically low mortgage rate with one that makes the next purchase considerably more expensive.

That tension—often called the mortgage-rate lock-in effect—has become one of the defining forces in the housing market. Now, a proposed bill in Congress is asking whether the mortgage could move with the homeowner.

What is being proposed

Introduced in the U.S. House of Representatives on August 3, 2026, the Making Ownership Viable for Everyone Act—or MOVE Act—would direct Fannie Mae and Freddie Mac to begin purchasing and securitizing certain portable conventional mortgages.

In its simplest form, a portable mortgage would allow a homeowner to sell one property and transfer the existing mortgage’s interest rate, remaining terms, and outstanding balance to a replacement property.

The mortgage would follow the borrower—not the house.

That makes portability different from an assumable mortgage. With an assumable mortgage, a qualified buyer takes over the seller’s existing loan on the original property. With a portable mortgage, the current borrower carries the financing to the next property.

Under the bill’s current language, the transfer to the new property would need to occur within 90 days of selling the home that originally secured the mortgage. If the bill became law, Fannie Mae and Freddie Mac would have 180 days to begin purchasing and securitizing qualifying loans with that feature.

Why the idea matters

Mortgage rates are not merely affecting what buyers can afford. They are influencing whether existing homeowners are willing—or financially able—to become sellers at all.

Someone who refinanced or purchased during the years of exceptionally low rates may have substantial equity and every practical reason to move. But equity alone does not erase the difference between the current payment and the cost of financing another home.

The Federal Housing Finance Agency has studied the lock-in effect and found that the widening gap between homeowners’ existing rates and prevailing market rates materially reduced household mobility and home sales. Fewer owners entering the market means fewer choices for the buyers waiting behind them.

Portable mortgages could loosen part of that gridlock. Move-up buyers could pursue additional space. Downsizers could choose a home that better fits the next chapter. Relocating homeowners could move without automatically surrendering the most favorable part of their existing financing.

And each of those moves could return another home to the market.

What the headline leaves out

The most important fact is also the easiest to overlook: the MOVE Act is proposed legislation. It is not law, and portable conventional mortgages are not suddenly available to homeowners.

The bill is also remarkably brief. It establishes a direction for Fannie Mae and Freddie Mac, but it does not answer many of the questions that would determine how useful portable mortgages might ultimately be.

The current text applies to conventional mortgages eligible for purchase and securitization by Fannie Mae or Freddie Mac. It does not create portability for every mortgage, and it does not expressly make all existing conventional loans portable. In fact, its language refers to mortgages under which the lender permits the transfer—a meaningful distinction from requiring every lender to modify every existing loan.

The bill also addresses the transfer of the existing balance. It does not promise that a homeowner could finance an entire, more expensive purchase at the old rate. If the next home costs more, the buyer may still need additional financing at then-current terms.

Other practical questions remain unresolved: Would the borrower need to qualify again? How would the replacement property be appraised and approved? How would supplemental financing be structured? What happens if the sale and purchase cannot be completed within the proposed 90-day window?

Those are not minor details. They will determine whether portability becomes a broadly useful option or a narrower product available only in certain circumstances.

What it could mean in Dallas

Dallas has no shortage of homeowners whose lives have moved forward while their housing decisions have remained on hold.

The potential relevance extends across several parts of the market: growing families reluctant to trade a low payment for more space, longtime owners considering a lower-maintenance home, and professionals weighing a relocation within or beyond Dallas.

But the local luxury market also illustrates one of the proposal’s limitations. The bill centers on qualifying conventional mortgages purchased by Fannie Mae and Freddie Mac. For 2026, the baseline conforming loan limit for a one-unit property is $832,750. Jumbo and privately held loans generally fall outside that framework as the bill is currently written.

That does not mean the legislation would be irrelevant to higher-priced Dallas homes. A property’s value and its mortgage balance are not the same thing, particularly for owners with substantial equity. It does mean that the type, balance, and ownership of the existing loan would matter as much as the price of the next home.

Portability could create more movement. It would not necessarily make Dallas housing less expensive, nor would it solve the underlying need for additional housing supply. More owners might list—but some of those same owners would also reenter the market as buyers.

The likely result would be a more fluid market, not an automatically cheaper one.

What happens next

As of September 16, 2026, H.R. 10028 has been introduced in the House and referred to the House Committee on Financial Services. It has not passed the House or Senate, and there is no guarantee that it will advance in its current form—or at all.

Still, the proposal is worth watching.

The MOVE Act matters not because portable mortgages are imminent, but because it recognizes something homeowners have already been telling us: the mortgage rate has become part of the house they are reluctant to leave.

Whether this particular bill advances or not, the question behind it is unlikely to disappear:

Should a homeowner’s financing have to start over simply because life requires a different address?

This article is for general informational purposes and reflects the status of H.R. 10028 as of September 16, 2026. It is not legal, tax, financial, or mortgage advice.