Hipster left the US four years ago with a backpack, a laptop, and a plan that changed twice before he finished unpacking. Along the way he opened a local bank account (nobody takes American checks), co-founded a small company (the visa rules made it the easy route), and fell for someone who isn't American. None of it felt like a tax event. It felt like Tuesday.
Then an American friend abroad messaged: "Did you file your FBAR yet?" Hipster assumed it was a typo for FUBAR. After reading the penalty section, he decided that was close enough.
Here's what nobody tells Americans before they move: the US taxes citizens and residents on worldwide income, wherever they live. Separately, it wants to know where their money sits. That's the Report of Foreign Bank and Financial Accounts, or FBAR, filed as FinCEN Form 114. It isn't a tax form. It reports no income and creates no tax. It's a disclosure to the Treasury's Financial Crimes Enforcement Network (FinCEN), though the IRS enforces it.
The duty comes from the Bank Secrecy Act (31 U.S.C. § 5314) and 31 CFR § 1010.350: a US person with a financial interest in, or signature or other authority over, a foreign financial account must report it. The filing instructions set the line: file if the combined value of your foreign accounts exceeds $10,000 at any time during the calendar year.
Three phrases do the heavy lifting, and the rest of the book unpacks them: combined (accounts are added together, not tested one by one), at any time (one big day counts, even if the account was empty by December 31), and signature authority (you don't have to own a cent).