FBAR Filing 2026: The $165K Mistake You Don't Want to Make

Imagine getting a letter from FinCEN about a bank account you forgot you had six years ago. A savings account in Germany you opened when you thought you might stay longer. You moved back to the US, then moved abroad again, and the account just… sat there. A few thousand euros collecting dust. The letter informs you that failing to file an FBAR on that account makes you subject to a penalty of either $165,353 or 50% of the highest balance in that account — whichever is greater. For a dormant savings account. For a form you didn’t know existed.

This happens to real people. It happened to a friend of mine who’d spent five years working in Switzerland and had a PostFinance account he’d simply stopped using. The balance was modest. The potential penalty was not.

The FBAR — Foreign Bank Account Report — is one of the most consequential disclosure requirements the US government imposes on its citizens abroad, and one of the least understood. Let’s fix that.

What FBAR Is and Who Must File

The FBAR (officially FinCEN Form 114) is a disclosure report filed with the Financial Crimes Enforcement Network, a bureau of the Treasury Department. It has nothing to do with your income tax return. It reports nothing about your tax liability. It simply tells the government that you, a US person, have a financial interest in or signature authority over foreign financial accounts.

Any US person — citizen, green card holder, or resident alien — who has foreign financial accounts totaling more than $10,000 in aggregate at any point during the calendar year must file an FBAR. That’s it. You’re not reporting income. You’re not paying tax. You’re just telling FinCEN the account exists.

US persons with filing obligations include:

• US citizens living abroad (obviously)
• US citizens living in the US with foreign accounts
• Permanent residents (green card holders) worldwide
• Anyone treated as a US resident for tax purposes

“US persons” also includes certain US-formed entities: corporations, partnerships, LLCs, and trusts with foreign accounts.

The $10,000 Threshold — And the Misconception That Bites People

Here is where many people get tripped up, and it’s worth being precise: the $10,000 threshold is aggregate, not per account. You don’t get to divide your balances across multiple accounts to stay under the limit.

If you have three foreign accounts — one with $4,000, one with €3,500, and one with CHF 4,000 — the threshold calculation uses the maximum aggregate value during the year (converting everything to US dollars). If the combined peak value at any single point during the year exceeded $10,000, you have an FBAR filing obligation.

This catches people who think they’re too small to matter. You might have a small checking account for day-to-day expenses, a savings account, and a brokerage account — all modest individually, all requiring disclosure collectively.

The threshold also applies to accounts where you have signature authority even if you have no financial interest. CFOs who can sign on corporate foreign accounts, for example, may have personal FBAR obligations for accounts they don’t own.

Willful vs. Non-Willful: The Penalty Distinction That Matters Most

The penalty structure for FBAR non-compliance is binary, and understanding the distinction between willful and non-willful violations is the most important thing you can take away from this article.

Non-willful violations: If you simply didn’t know about the FBAR requirement and failed to file, the penalty is up to $16,536 per report (as of 2026). Note the critical word: per report, not per account. This changed significantly after the Supreme Court’s 2023 ruling in Bittner v. United States, which held that the penalty applies to each annual filing, not to each foreign account. Before that ruling, the government argued you owed a penalty for every foreign account you failed to disclose on every FBAR you should have filed. After Bittner, it’s per report, per year. For someone with three accounts and five years of missed filings, the difference between “per account” ($247,500+) and “per report” ($82,680) is substantial.

Willful violations: If you knew about the requirement and chose not to comply — or were “willfully blind” to it — the penalty jumps to $165,353 or 50% of the highest balance in the unreported account, whichever is greater. These aren’t mutually exclusive either: willful violations can also carry criminal penalties.

“Willful” doesn’t require a signed confession. Courts have found willfulness based on circumstantial evidence: checking a box on your tax return that says you have no foreign accounts when you do, receiving bank statements for foreign accounts while not filing, or having an accountant who told you to file an FBAR and not doing it.

My opinion on this: the willful penalty — $165,353 for a single missed filing on an account you knew existed — is genuinely disproportionate. The government’s stated aim is catching tax evasion, but FBAR itself doesn’t even collect tax. You could have paid every dollar of tax owed on your foreign accounts, reported every cent of income, and still face a six-figure penalty for forgetting to file a disclosure form. That said, the IRS has discretion in how aggressively it pursues cases, and willful penalties this severe tend to be reserved for egregious situations — large balances, deliberate concealment. The law gives them the authority; enforcement is another matter.

What Counts as a Reportable Foreign Financial Account

The definition is broader than most people expect:

• Bank accounts (checking, savings, time deposits)
• Securities accounts at foreign financial institutions
• Commodity futures or options accounts
• Insurance policies with cash value (certain types)
• Mutual fund and similar pooled investment accounts
• Foreign pension plans (whether government or private)
• Accounts in which you have signature authority (even without financial interest)

What’s not reportable: directly held foreign real estate (the real estate itself, not an account held at a foreign institution that holds real estate), precious metals held personally, and foreign stock or securities held directly (not in an account at a foreign institution).

The Deadline and How to Actually File

The FBAR deadline is April 15, the same as the US income tax return. Unlike the tax return, which requires you to request an extension, the FBAR extension is automatic. If you miss April 15, you automatically get until October 15 — no form to file, no extension request needed.

Critically: the FBAR is not filed with your tax return. It’s not sent to the IRS. It’s filed electronically through the BSA E-Filing System maintained by FinCEN at bsaefiling.fincen.treas.gov. The form is FinCEN Form 114, not a tax form. Many people assume their tax preparer handles this automatically. Some do. Many don’t. Ask explicitly.

You can file directly through the FinCEN website at no charge. If you use a tax professional, confirm they’re also handling your FBAR — it’s a separate engagement in many firms, and a separate fee.

The Post-Bittner Reality for Past Non-Filers

If you’ve been living abroad and not filing FBARs, the Bittner ruling genuinely changes your calculus. Before the decision, the risk of going back and voluntarily disclosing years of missed FBARs was daunting because the government could (and sometimes did) assert per-account penalties that added up to amounts larger than the balances in the accounts themselves.

Post-Bittner, the maximum non-willful penalty for five years of missed filings is $82,680 ($16,536 x 5 reports) — regardless of how many accounts you had. That’s still not trivial, but it’s a materially different risk profile than what existed before 2023.

For non-willful non-filers who want to get into compliance, the IRS Streamlined Filing Compliance Procedures offer a path forward with reduced penalties. If you’re in this situation, this is the program worth researching — I’d suggest starting with the FBAR side and working back to your full compliance picture.

If you were born abroad but hold US citizenship and didn’t know about FBAR — you may be in the accidental American category, where the compliance burden and the available remedies have some additional nuance.

The Practical Question: Do You Actually Need a Tax Lawyer?

For straightforward situations — a single foreign checking account, no unusual transactions, you simply forgot to file — the FBAR itself is not complex. You can file FinCEN 114 yourself through the BSA E-Filing System without professional help.

Where professional help becomes worth the cost:

• Multiple years of missed filings
• Accounts with significant balances
• Any situation where willfulness might be argued
• Complex account structures (foreign pensions, offshore trusts, corporate accounts)
• If you’ve received any correspondence from the IRS or FinCEN

And if you’re thinking about giving up US citizenship to escape the compliance burden entirely, read Exit Tax Explained before you decide — because the exit tax calculation requires being current on all FBAR filings anyway.

The Bottom Line

FBAR is a disclosure form, not a tax. It won’t cost you money to file it properly, and it won’t trigger an audit of your tax return. What it can cost you — significantly — is failing to file it when you’re required to.

The aggregate threshold is $10,000. The deadline is April 15 with an automatic extension to October 15. The form is FinCEN 114, filed at the BSA E-Filing System, not with the IRS. The willful penalty is $165,353 or 50% of the balance. The non-willful penalty, after Bittner, is $16,536 per annual report — still worth avoiding, but less catastrophic than it once was.

Check your accounts. Check the aggregate. File the form. It takes about fifteen minutes for a straightforward case.