The most common penalty for Americans abroad is the failure-to-file penalty, which is 5% of unpaid taxes per month, up to 25% of what you owe. But for most expats, the bigger risk is not income tax penalties. It is the FBAR penalty: up to $16,536 per report for non-willful failure to report foreign bank accounts, even if you owe $0 in taxes.
The good news: every penalty on this list is avoidable. Most Americans abroad owe no federal taxes after applying the FEIE and the Foreign Tax Credit. And if you are behind on filing, the IRS offers penalty-free catch-up programs specifically for expats.
How Does the Failure-to-File Penalty Work for Expats?
The IRS charges 5% of your unpaid tax balance for each month (or partial month) your return is late, up to a maximum of 25%. If you owe $0 after applying the FEIE or Foreign Tax Credit, the failure-to-file penalty is $0, because 5% of $0 is $0.
However, you must file to claim these benefits. The FEIE does not apply automatically. If you never file, the IRS has no record that you qualify, and they may assess taxes based on your gross income without any exclusions.
- The automatic expat extension: Americans living abroad receive a 2-month extension to June 15 (no form required). You can extend further to October 15 by filing Form 4868. These extensions apply to filing, not payment. If you owe taxes, interest begins accruing on April 15, regardless.
- Why you should file even if you owe $0: Filing establishes your compliance history, starts the statute of limitations clock (the IRS generally has three years to audit a filed return, but no limit on unfiled returns), and preserves your ability to claim refunds and credits.
What Are the FBAR Penalties?
The FBAR is the penalty that catches the most expats off guard. It is a separate filing from your tax return, due April 15 with an automatic extension to October 15, and it is required if the combined value of all your foreign financial accounts exceeds $10,000 at any point during the year.
Willful penalty: The greater of $165,353 or 50% of the highest account balance. Willful violations can also carry criminal penalties, including fines up to $500,000 and up to 10 years in prison.
Non-willful penalty: Up to $16,536 per FBAR report per year. The Supreme Court’s 2023 Bittner v. United States decision confirmed that non-willful penalties apply per report, not per account. This is a significant distinction: if you have 10 foreign accounts and miss one FBAR, the maximum non-willful penalty is $16,536 for that year’s report, not $165,360.
