Mortgage Rate Lock-In Effect: What It Means If You Want to Move

If you bought or refinanced a home when mortgage rates were much lower, moving today can come with an uncomfortable tradeoff: giving up a favorable mortgage and taking on a new loan at a much higher rate. That’s the “mortgage rate lock-in effect,” and it continues to influence homeowners’ decisions about whether to sell. Nearly half (49.9%) of outstanding U.S. mortgages had rates of 4% or less in the first quarter of 2026, according to Realtor.com’s analysis of Federal Housing Finance Agency data. By comparison, the average 30-year fixed mortgage rate was 6.95% as of Sept. 17. If you’d like to move but are reluctant to give up your current rate, gaining a better understanding of the numbers behind lock-in can help you weigh the cost of staying against your reasons for selling. Start Making Offers Without Waiting to Sell Your Home Through our Buy Before You Sell program, HomeLight can help you unlock a portion of your equity upfront to put toward your next home. You can then make a strong offer on your next home with no home sale contingency. What is the mortgage rate lock-in effect? The mortgage rate lock-in effect happens when a homeowner has a mortgage rate significantly below cu...