FBAR vs FATCA: Why You Probably Need to File Both

US taxpayers with foreign financial accounts face two separate reporting regimes that often overlap but are never interchangeable: the FBAR (FinCEN 114) under the Bank Secrecy Act, and FATCA (Form 8938) under IRC §6038D. Compliance with one does not satisfy the other. Each has its own thresholds, its own form, its own filing destination, its own penalties, and its own scope of assets. Here’s how to tell them apart and why you almost certainly need both if you have significant foreign account balances.

TL;DR side-by-side

Use the FBAR Threshold Calculator to identify which calendar years you triggered the FBAR requirement, and the FATCA Form 8938 Calculator to confirm whether Form 8938 is also required based on your filing status and residency.

Key differences

Account scope

The asset scope differs in ways that catch people off guard in both directions.

FBAR covers any “foreign financial account” — broadly defined as an account held at a financial institution located outside the US. This includes:

• Foreign bank accounts (checking, savings, fixed deposits)
• Foreign brokerage accounts holding securities
• Foreign mutual fund accounts
• Foreign pension and retirement accounts
• Certain life insurance policies with cash surrender value held at foreign insurers
• Any account over which a US person has signature authority, even without ownership

The signature authority rule is important: a US executive who is a signatory on a foreign subsidiary’s bank account — with no personal financial interest in that account — triggers FBAR. Most multinationals don’t inform their US-person employees that routine corporate treasury signing authority creates personal FBAR obligations.

FBAR does not cover direct ownership of foreign securities held through a US brokerage account, or direct ownership of foreign real estate.

FATCA (Form 8938) covers “specified foreign financial assets” — a broader definition in some respects:

• All foreign financial accounts (broadly overlapping with FBAR)
• Foreign-issued stocks and securities held directly or through foreign accounts
• Interests in foreign partnerships, foreign LLCs, and foreign trusts
• Foreign private equity and hedge fund investments
• Certain foreign-issued life insurance contracts with cash value

FATCA does not cover:

• Foreign real estate held directly (though real estate held through a foreign entity may be reportable)
• Physical precious metals or collectibles held for personal use
• Accounts held at US branches of foreign banks (the account is a US account for FBAR/FATCA purposes)
• Foreign financial assets you report on a timely filed Form 3520, 5471, 8621 or certain other listed forms (no duplicate reporting on Form 8938)

Joint accounts

The filing mechanics differ for married couples:

• FBAR: each spouse who has signature authority or a financial interest in a foreign account files separately. A married couple with a joint foreign account technically both trigger FBAR. However, Form 114a (Record of Authorization to Electronically File FBARs) allows a spouse to file on behalf of the other, provided all of the accounts are jointly owned by the spouses
• FATCA: married filing jointly (MFJ) filers have higher thresholds that apply to their combined foreign financial assets. If you file MFJ and your combined foreign assets don’t reach $100k year-end / $150k peak (domestic) or $400k year-end / $600k peak (abroad), neither spouse files Form 8938

Signature authority vs. beneficial ownership

This is the most practical difference for US persons at corporations:

• FBAR: signature authority alone — without any ownership interest — triggers the filing obligation. No financial benefit, no ownership stake, no income — just the ability to move money from the account
• FATCA (Form 8938): requires beneficial ownership or direct holdings. Mere signature authority without an ownership interest does not trigger Form 8938

A US-person CFO who has signing rights over a foreign subsidiary’s operating account owes FBAR but not Form 8938. Filing Form 8938 in this case isn’t penalized (it’s simply unnecessary), but failing to file FBAR is a civil — and potentially criminal — violation.

Why filing one doesn’t substitute for the other

The two regimes are administered by different agencies (FinCEN for FBAR; the IRS for Form 8938), share different data streams, and have genuinely different legal bases. The IRS receives information reported on Form 8938 and cross-references it with FBAR data received from FinCEN. A taxpayer who files one but not the other when both are required creates a detectable discrepancy.

Common situations where only one applies:

• FBAR required, Form 8938 not required: Taxpayer has $15,000 in a foreign bank account (FBAR threshold crossed); the same taxpayer files single, lives in the US, and the balance is below the $50k year-end / $75k peak Form 8938 threshold
• Form 8938 required, FBAR not required (rare): Taxpayer holds a $300,000 interest in a foreign limited partnership with no associated bank account; this is a FATCA-specified foreign financial asset but not a “foreign financial account” for FBAR purposes
• Both required (most common for expats with significant balances): Taxpayer has $80,000 in a foreign bank account and lives abroad — both the $10k FBAR threshold and the $200k/$300k FATCA thresholds are relevant (whether Form 8938 is also required depends on whether the abroad or the domestic thresholds apply)

The IRS has publicly stated that Form 8938 was not designed to replace FBAR and that both are separately enforceable obligations.

Penalty exposure (2025 inflation-adjusted figures)

FBAR civil penalties

Non-willful FBAR violations carry a penalty of up to $16,536 per violation per year (the $10,000 statutory maximum as adjusted for inflation under 31 CFR 1010.821). The Supreme Court’s 2023 decision in Bittner v. United States resolved a circuit split by ruling that the penalty accrues per report (i.e., per year) rather than per account. A taxpayer with 5 unreported foreign accounts in a single year owes one non-willful penalty up to $16,536 for that year, not five. This was a significant taxpayer victory for multi-account cases.

Willful FBAR violations carry the greater of $165,353 (the $100,000 statutory maximum as adjusted for inflation) or 50% of the highest aggregate balance of unreported accounts during the violation period. For a taxpayer with $500,000 in undisclosed foreign accounts, the willful penalty can reach $250,000 per year.

Criminal penalties for willful violations: a fine of up to $250,000, up to 5 years imprisonment, or both (31 USC §5322(a)); up to $500,000 and 10 years if the violation occurs while violating another US law or as part of a pattern of illegal activity involving more than $100,000 in a 12-month period (31 USC §5322(b)).

The reasonable cause exception is narrow for FBAR purposes. The IRS and courts apply a high standard — relying on incorrect advice from a US (non-cross-border) accountant rarely qualifies. Proving reasonable cause typically requires contemporaneous documentation of the advice received.

FATCA (Form 8938) penalties

Initial failure to file Form 8938: $10,000 penalty per form per year.

Continuing failure after IRS notice: if the failure continues for more than 90 days after the IRS mails notice, $10,000 for each 30-day period (or fraction) after that 90-day period, up to a maximum of $50,000 in continuing penalties (IRC §6038D(d)).

Accuracy-related penalty on underreported foreign income: 40% of the underpayment attributable to undisclosed foreign financial assets — double the standard 20% accuracy penalty for domestic underreporting.

Statute of limitations: 6 years, not 3. For Form 8938 omissions, the IRS has an extended window to assess tax. If the omission involves more than $5,000 of foreign income, the 6-year SOL applies to the entire return, not just the omitted portion.

Common scenarios

Scenario 1: First year living abroad (most common mistake)

A single taxpayer moves to the UK in March of a given year and files as a US resident for that year. By year-end, their UK current account holds £65,000 (~$82,000).

• FBAR: the aggregate exceeded $10,000 at some point during the year → FBAR required
• FATCA: the higher “abroad” thresholds apply only if the taxpayer was a bona fide resident of a foreign country for an uninterrupted period that includes the entire tax year, or was present in foreign countries at least 330 full days during a 12-month period ending in the tax year. A March arrival usually meets neither test for that year, so the domestic thresholds ($50,000 year-end / $75,000 any time for a single filer) apply. At $82,000 → Form 8938 is required in this year
• Common mistake: assuming the FATCA threshold not being crossed means FBAR isn’t required either. Wrong. FBAR threshold is $10,000. Both analyses are separate.

Scenario 2: US-based corporate signatory

A US-resident CFO has signing authority over four foreign subsidiary bank accounts totaling $2 million. She has no personal financial interest in any account.

• FBAR: signature authority over foreign financial accounts with aggregate > $10,000 → FBAR required (one FBAR covering all four accounts, reporting only the accounts over which she has signature authority)
• Form 8938: no beneficial ownership or direct financial interest → Form 8938 not required
• Common mistake: either (a) not filing FBAR because “it’s a company account, not mine” — wrong, the obligation is based on signature authority; or (b) filing Form 8938 for the same accounts — unnecessary

Scenario 3: Expat couple with high balances

A married couple living in Germany with €350,000 ($385,000) in a joint German bank account.

• FBAR: aggregate > $10,000 → each spouse files FBAR (or uses Form 114a to designate one to file for both)
• FATCA: MFJ, abroad — thresholds are $400,000 year-end / $600,000 peak. At $385,000 year-end → Form 8938 not required (below threshold) unless balances peaked above $600,000 during the year
• Key point: FBAR is required; Form 8938 depends on the peak balance during the year, not just the year-end figure

Authority

• 31 USC §5314 (FBAR statute): https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title31-section5314
• 31 CFR §1010.350 (FBAR regulations): https://www.ecfr.gov/current/title-31/subtitle-B/chapter-X
• IRC §6038D (FATCA reporting requirement): https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title26-section6038D
• Form 8938 instructions: https://www.irs.gov/pub/irs-pdf/i8938.pdf
• FinCEN 114 Reference Guide: https://bsaefiling.fincen.gov/resources/FinCENFBARHelp.pdf
• Bittner v. United States (2023) — Supreme Court ruling on per-report vs per-account FBAR penalty
• Last verified: 2026-04-30