If you’re thinking about downsizing your home in 2026, there’s one tax rule that could quietly cost you thousands—and most empty nesters don’t even realize it until it’s too late. With home values rising and tax laws staying largely unchanged, many retirees are discovering unexpected financial consequences when they sell. What seems like a smart move—selling a larger home and moving into something smaller—can trigger tax bills or cause you to miss out on valuable credits. In some cases, overlooking a single rule could cost you up to $2,500 or more in lost savings or tax advantages. Before you list your home, here’s what every empty nester needs to understand about the downsizing tax rule.
