1. A tax bill that didn’t need to exist
Adding David is a gift of half the home, about $225,000, so Linda may need to file a federal gift tax return. If Linda later moves to assisted living and they sell for $450,000, David’s half keeps Linda’s original cost. He doesn’t live there, so he can’t use the home-sale exclusion: about $100,000 of taxable gain on his half. Had the home stayed in Linda’s name, her exclusion could have covered the entire gain.