What the mortgage lock-in effect is costing community banks

More than $4 trillion in U.S. mortgages carry rates below 4 percent, most originated between 2020 and 2022. Roughly 60 percent of borrowers are in loans well below today’s prevailing rates. That concentration is sitting on community bank balance sheets and squeezing margins. Understanding the full weight of that problem starts with what is actually happening inside the institution..What’s happening on the balance sheetMany borrowers want to move but cannot afford to. Replacing a 2 to 3 percent mortgage with today's rates means a significantly higher monthly payment, and for many households, that cost makes moving financially out of reach.The ripple effect runs through the entire institution. Funding costs rise while loan yields stay flat, compressing margins. Loans that were expected to turn over are staying on the books far longer than projected. Because those borrowers are not moving, origination volume stays low. For community banks, that last point carries particular weight. The mortgage is typically where the full customer relationship begins, and when mortgage activity stalls, deposit growth, cross-sell opportunities, and new lending activity slow with it.Why the usual fixes haven’t workedMost banks have responded in one of three ways: wait for rates to drop, offer small payoff discounts of 1 to 2 percent, or price new purchase loans aggressively to generate volume.None of them address the core issue: a portfolio full of low-rate loans that are not moving. Waiting is a bet on the macro environment, not a plan. Small discounts rarely move the needle for a borrower facing a rate jump of 3 to 4 percentage points. Discounting new originations adds volume at compressed margins without touching the low-yield loans already on the books. The legacy portfolio stays exactly where it is. There is, however, a way to change that.A different approachA below-market mortgage is not just a drag on yield. There is real economic value locked inside it. The gap between what the borrower is paying and what today’s market rate would require represents a meaningful amount of money. A well-structured program can convert that value into a payoff discount that gives the borrower enough financial relief to actually move, while allowing the bank to retire the old loan and put that capital to work at current rates.Done right, the economics can work for both sides. The borrower gets help covering the cost of moving. The bank improves its portfolio mix and opens the door to a new origination. Several of these transactions have now closed, and the results are bearing out the concept. This approach can run on a bank's existing lending infrastructure, with no new systems or major integration projects required, making it accessible to community banks of any size.The customer relationship at stakeThere is a competitive dimension here that goes beyond the balance sheet. A customer who wants to relocate for work, downsize, or move closer to family is at a turning point. The bank that can offer a real path forward at that moment builds loyalty that lasts. The bank that has nothing to offer risks losing that relationship to a competitor that does.Community banks have always differentiated themselves by serving customers through major life moments, and the lock-in effect has created exactly that kind of moment for too many households. Addressing it now also prepares institutions for what comes next.Position now, regardless of what rates doThe mortgage lock-in problem is not unique. When rates rise sharply after years of low borrowing costs, homeowners stop moving and lenders are left holding low-rate loans far longer than expected. The current environment is more severe than most, but the pattern is familiar.Rates will eventually ease, and some of the pressure will lift. But the structural mismatch will still be there in the next cycle. Community banks that build the tools to manage this problem now will be in a stronger position regardless of what rates do next. Those that wait will find themselves in the same place again.Jonathan Arad is founder and CEO of Takara, a financial technology company pioneering solutions that unlock mobility and affordability in the U.S. mortgage market.