Can You Port a Mortgage to a New Home in the US?
Homeowners who’ve lived abroad or read about mortgage products in other countries sometimes ask whether a favorable loan can simply move with them to a new house. In the US, the answer generally involves starting over.
The short answer
Mortgage porting, where a loan’s rate and terms transfer to a new property when a borrower moves, is a feature offered by lenders in some other countries but is not a standard product in the US mortgage market. US mortgages are typically tied to the specific property that secures them, so buying a new home almost always means either paying off the old loan and originating a new one, or, in narrower circumstances, formally assuming a loan that’s already attached to the property being purchased.
Why US mortgages are structured around the property
A mortgage is a loan secured by a specific piece of real estate — the property itself is the collateral, and the lien is recorded against that property’s title, not against the borrower generally. When a home is sold, the lien on that property typically has to be satisfied, which is why the payoff process results in a release of lien. There’s no standard mechanism in US lending to detach a rate and term from one property and reattach it to another, since the whole structure is built around the security interest in the original home.
What US homeowners actually do instead
- Pay off and originate a new loan. The most common path is selling the current home, paying off its mortgage, and applying for a new mortgage on the next property, priced according to market conditions and underwriting standards at that time.
- Consider assuming an existing loan. In limited cases, a buyer purchasing a home with a qualifying assumable mortgage already in place can take over that specific loan’s existing terms, but this only works for the loan already attached to that property, not one being carried over from elsewhere.
- Look into a rate lock extension or bridge product. Some lenders offer short-term tools like a bridge loan to help manage timing between selling one home and buying the next, though these solve a cash-flow problem rather than transferring an old rate.
Why the confusion comes up
Mortgage porting is genuinely common in some countries, which is part of why the idea circulates even among US homeowners. The underlying financial systems differ enough, though, that a feature standard in one market simply doesn’t have a direct equivalent in another. It’s a reasonable question to ask, but the practical answer for someone moving within the US is that the existing loan generally doesn’t travel with them.
What to weigh
Since a new mortgage in the US is priced at the time it’s originated, someone moving from a lower-rate loan into a new one may end up with different terms than they’re used to, for better or worse depending on market conditions at the time. Comparing the total cost of paying off and refinancing versus exploring an assumable option, if one happens to be available on the target property, is a reasonable way to think through the tradeoffs rather than assuming either path is automatically better.
The takeaway
Porting isn’t part of how US mortgages work, so a move to a new home almost always means a fresh loan application, even if the previous mortgage had appealing terms. Understanding this upfront can help set realistic expectations when planning a move, rather than assuming a favorable rate will simply carry forward.