Portability went into effect on Jan. 1, 2008, and has become important given the decade-long runup in Florida property values. Before portability came along, some homeowners wouldn’t consider a move because they didn’t want to lose their low tax bills. With portability, they can take the savings with them, up to a maximum of $500,000.
https://www.floridarealtors.org/news-media/news-articles/2021/04/understanding-florid...