Dual citizens, along with all other “United States persons”, must file a Report of Foreign Bank Accounts (FBAR) if the aggregate value of their foreign financial accounts exceeds $10,000 at any time during the year. This requirement applies to U.S. citizens, residents, green card holders, and those who must file taxes because they are substantially present in the United States. It also applies to legal entities, including corporations, partnerships, and trusts.
While other countries only tax their citizens on income earned within the country’s borders, the United States taxes its citizens—and other individuals who have a filing requirement—on all worldwide income from any source. This requirement, along with the FBAR filing requirements, can create problems for expatriates, immigrants, and anyone else with offshore bank accounts.
Expats who move abroad are still responsible for complying with U.S. tax law as long as they remain U.S. citizens. Even if you live abroad for the entire year, and none of your income would be taxable, you may still have to file a tax return. If you open a bank account in a foreign country, and the aggregate value of all of your foreign accounts exceeds $10,000 during the year, you must file an FBAR.