I think I figured out the source of my conclusion. As noted above, to apply the Foreign Income Exclusion under the physical presence test for 2024, the 330 days can include days in 2025. However, when looking at the monetary thresholds that trigger reporting Foreign Financial Assets on Form 8938 -- to be considered living outside the US (and thus subject to much higher monetary reporting thresholds) you could either be a bona fide resident OR have lived overseas for 330 full days during any 12 consecutive months THAT END IN THE TAX YEAR BEING REPORTED. So it could be possible that in 2024 you meet the 330 day requirement for the Foreign Income Exclusion counting days in 2025, but you would be subject to a lower reporting threshold on your Foreign Financial assets because your 330 days didn't end in 2024. Is this correct? So slightly different applications of the 330 day rule for the different purposes. I didn't catch that difference at first.
