How long can a U.S. citizen live abroad? A U.S. citizen can live abroad indefinitely without losing their citizenship. However, certain actions or prolonged absences may lead to suspicions about their intent to retain U.S. citizenship.
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Generally, you can remain outside of the United States for up to 1 year (365 days) without jeopardizing your green card status. However, if you plan to stay outside of the United States for an extended period of time, you may need to take additional precautions to maintain your green card status.
Thus, the penalty is the possibility of denied or delayed entry into the US, as well as the associated costs (e.g. missing connecting flights or meetings).