The Foreign Bank Account Report (FBAR) is a form every US expat may need to file.
If you have had at least $10,000 in savings in any foreign financial accounts at any one time during the tax year, even if you do not need to file a US tax return, you may have to file an FBAR because of this obligation.
Therefore, whether you have a foreign bank account, like savings, checking, or investments, you’ll need to file the FBAR.
Additionally, you need to file if you have signatory authority over a foreign financial account (e.g., shared bank account with your spouse).