Moving abroad adds three required US forms, and missing just one costs $10,000. Not one of these forms bills you for tax. The Report of Foreign Bank and Financial Accounts (FBAR) is due when your total foreign account balances pass $10,000 at any time in the year, even if the account earns zero interest [1].

The big picture:

Leaving the US changes where you pay tax. It also opens a second set of rules driven by balances and ownership.

Three distinct lines run side by side: the account form watches your total bank balances [1]. The asset statement tracks what a person living abroad holds [3]. The company form reports any foreign business you own [4].

These rules ignore profit: an account that crosses $10,000 for a single day still falls inside the rule. The Internal Revenue Service (IRS) says plainly that an account earning zero income must still be reported [1]. That duty runs on a different clock from the tax bill.

What strikes me is where the real risk sits. A family can map out two countries’ tax rules to the dollar. It can still trip a penalty line that never asks about income.

By the numbers

  • $10,000 — Account trigger: The account form is due when combined foreign accounts pass $10,000 at any time in the calendar year [1]. The Financial Crimes Enforcement Network (FinCEN), which receives the form, states the same line [2].
  • $200,000 — Asset statement line: A taxpayer living abroad files Form 8938 once foreign assets pass $200,000 on the last day of the year, or $300,000 at any time [3]. A joint return raises those limits to $400,000 and $600,000 [3].
  • $10,000 — Company penalty: A foreign business left off the forms costs $10,000 for each yearly record [4]. After the IRS mails a notice and 90 days pass, the charge grows by $10,000 for each 30-day period, up to $50,000 [5][6].
  • 50 percent — Willful ceiling: A deliberate miss on the account form lifts the maximum fine to the greater of $100,000 or half the account balance [7]. The table for penalties assessed on or after January 17, 2025 puts that cap at $165,353 [8].

What I’d watch:

The filing dates and notice clocks matter just as much as the dollar limits. I have been watching how these three filings stack against each other.

  • The automatic extension: The account form is due April 15 for the prior year. An automatic extension runs to October 15 with no paperwork needed [1].
  • The 90-day notice: The added charge on a missed asset or company report starts only after the IRS mails a notice [5][6]. That wait runs 90 days. It then adds $10,000 for each 30-day period, capped at $50,000 [6].
  • Two penalty ceilings: The law caps an accidental miss on the account form at $10,000 [7]. But the yearly rate table puts that same ceiling at $16,536 for penalties assessed on or after January 17, 2025 [8].
  • The stacking years: A foreign business left off the forms for three years brings charges for each of those years [4][6]. The penalty applies to every single annual record period [6].

The catch:

My read is that these amounts are caps and yearly charges, not automatic bills that arrive in the mail. The honest limits of the rule are easy to miss. A year with no tax owed is still a year with three filings [1][3][4].

The asset statement and the company report carry fixed penalty amounts [5][6]. The account form’s $10,000 limit moves with an indexed table. The two never line up [7][8].

Filing one form also does not fix a failure to file another [5][6].

The penalty is written for the year that was missed, so a late filing does not clear the year it skipped [5][6].

The part I keep circling is how the biggest bills get built. Our desk tracked one case where an employer let an engineer work from Spain for seven months. The Spanish tax agency ruled the employer had a taxable presence there.

The bill that followed carried $110,000 in penalties and social security contributions. That figure is our field note, not a published fact. It makes the core point: the number that hurts comes from a compliance event, not a tax rate.

At a glance

  • The Big Shift: Moving abroad adds three required US forms based entirely on dollar amounts and ownership, rather than tax owed.
  • Why It Matters: Fines apply per form and per year, meaning a missed asset or company report costs $10,000, while accidental account form misses risk up to $16,536.
  • What I’d Watch: How the filing dates and the notice clocks run against those dollar lines.
  • The automatic extension: The account form is due April 15 but automatically extends to October 15 with no paperwork.
  • The 90-day notice: Added charges begin only after the IRS mails a notice and 90 days pass, adding $10,000 per month up to $50,000.
  • The indexed ceiling: The accidental account maximum is $10,000 by law, but $16,536 under the table applied to penalties assessed on or after January 17, 2025.
  • The Catch: These set amounts are caps and yearly charges, filing one form does not cover another, and the largest bills often stem from compliance events rather than actual tax rates.

Related reading

Sources

[1] IRS, Report of Foreign Bank and Financial Accounts (FBAR) — https://www.irs.gov/businesses/small-businesses-self-employed/report-of-foreign-bank-and-financial-accounts-fbar (retrieved 2026-10-15) [2] FinCEN, Report Foreign Bank and Financial Accounts — https://www.fincen.gov/report-foreign-bank-and-financial-accounts (retrieved 2026-10-15) [3] IRS, Do I need to file Form 8938 (Statement of Specified Foreign Financial Assets) — https://www.irs.gov/businesses/corporations/do-i-need-to-file-form-8938-statement-of-specified-foreign-financial-assets (retrieved 2026-10-15) [4] IRS, Instructions for Form 5471 (Information Return of U.S. Persons With Respect to Certain Foreign Corporations) — https://www.irs.gov/instructions/i5471 (retrieved 2026-10-15) [5] 26 U.S.C. § 6038D, Reporting of specified foreign financial assets — https://www.law.cornell.edu/uscode/text/26/6038D (retrieved 2026-10-15) [6] 26 U.S.C. § 6038, Information with respect to certain foreign corporations and partnerships — https://www.law.cornell.edu/uscode/text/26/6038 (retrieved 2026-10-15) [7] 31 U.S.C. § 5321, Civil penalties — https://www.law.cornell.edu/uscode/text/31/5321 (retrieved 2026-10-15) [8] 31 CFR 1010.821, Penalty adjustment and table — https://www.ecfr.gov/current/title-31/subtitle-B/chapter-X/part-1010/subpart-G/section-1010.821 (retrieved 2026-10-15)