Form 8938 vs FBAR: When You File One, the Other, or Both

A Bay Area H-1B filer who misses Form 8938 for three years stacks $30,000 in §6038D failure-to-file penalties before any unreported income, plus a non-willful FBAR penalty of up to $16,117 per year (2025 figure). If you moved to Sunnyvale, Cupertino, or Mountain View on an H-1B and kept your HDFC account in Mumbai, or you grew up in Taipei and still hold the brokerage account your parents opened for you in college, or you co-founded a startup with a 3% stake in a Bangalore subsidiary, you likely owe the U.S. government two separate foreign-asset disclosures every year. Not one. Two. And almost every Bay Area filer we meet who has been DIY-ing their returns has filed only the more famous of the two, missing the other entirely.

The two forms are FinCEN Form 114 (the FBAR) and IRS Form 8938 (FATCA). They cover overlapping but distinct sets of assets, they go to different agencies, they have completely different thresholds, and the penalties for missing either are eye-watering. Filing one does not satisfy the other. The IRS published an entire comparison table just because so many filers conflate them.

This guide walks through the structural difference between the two regimes, the threshold math (with the table you actually need), what each form covers, the penalty exposure, and a worked example for a typical Bay Area H-1B engineer with foreign accounts and a small founder stake. If any of this rhymes with your situation, our international tax team handles dual-reporting compliance constantly.

Why TWO Different Forms in the First Place

The two regimes come from different statutes, written decades apart, by different parts of the federal government, to solve different problems.

The FBAR (FinCEN Form 114) is older. It comes from the Bank Secrecy Act of 1970, codified at 31 U.S.C. §5314, with penalties at 31 U.S.C. §5321. The BSA is a Treasury anti-money-laundering statute, not a tax statute at all. The FBAR is administered by the Financial Crimes Enforcement Network (FinCEN), a Treasury bureau, and the form is filed through the BSA E-Filing System. It has nothing to do with your income tax return.

Form 8938 is much newer. It was created by the Foreign Account Tax Compliance Act (FATCA), signed in 2010 and codified at IRC §6038D. FATCA is part of Title 26 (the Internal Revenue Code), and Form 8938 is filed as an attachment to your Form 1040. It is administered by the IRS, not FinCEN. The whole point of FATCA was to add a second layer of disclosure that runs through the income-tax system, because the FBAR was not catching enough offshore evasion on its own.

So the structural answer to "why two forms" is: one is an AML report to Treasury under the Bank Secrecy Act, the other is a tax-return attachment to the IRS under FATCA. Congress kept both because they cover different scopes and serve different enforcement agencies. Filing one is not a substitute for the other, and the IRS has been explicit about this for fifteen years.

Reporting Thresholds: The Table You Actually Need

The single biggest source of confusion is the threshold math. FBAR has one threshold for everyone. Form 8938 has six thresholds depending on filing status and where you live. Here is the side-by-side:

Filing Situation	FBAR Threshold	Form 8938 Threshold
Single or MFS, living in U.S.	$10,000 aggregate at any point in year	>$50,000 end of year OR >$75,000 any point
MFJ, living in U.S.	$10,000 aggregate at any point in year	>$100,000 end of year OR >$150,000 any point
Single or MFS, living abroad	$10,000 aggregate at any point in year	>$200,000 end of year OR >$300,000 any point
MFJ, living abroad	$10,000 aggregate at any point in year	>$400,000 end of year OR >$600,000 any point

Three things to notice. First, the FBAR has no filing-status differentiation: $10,000 aggregate, any point during the year, full stop. Second, Form 8938 thresholds are far higher and depend on whether you live in the U.S. or abroad. Third, the FBAR threshold is the lowest by an order of magnitude, which is why most filers who owe a Form 8938 also owe an FBAR, but plenty of FBAR filers do not meet the Form 8938 threshold. The two regimes intersect mainly at the upper end.

One more wrinkle: "aggregate" for the FBAR means the sum of all foreign account high balances within the year, even if no single account ever exceeded $10,000. Three accounts at $4,000 each = $12,000 aggregate = FBAR required. The same logic applies to the Form 8938 thresholds.

What's Reportable on Each Form

The FBAR and Form 8938 cover overlapping but not identical sets of foreign assets. Form 8938 is broader.

FBAR (FinCEN Form 114) covers:

• Foreign bank accounts (checking, savings, time deposits)
• Foreign brokerage and securities accounts
• Foreign mutual funds and pooled investment vehicles
• Foreign-issued life insurance or annuities with a cash value
• Accounts where you have signature authority, even if you have no beneficial interest (this catches startup CFOs and treasurers on foreign-subsidiary accounts)

Form 8938 covers everything above PLUS:

• Foreign stocks or securities held outside of a financial account (e.g., a paper share certificate or directly registered foreign equity)
• Interests in foreign partnerships and foreign trusts
• Foreign-issued debt instruments (notes, bonds, debentures issued by non-U.S. persons)
• Certain foreign retirement and pension plans (including some employer-provided foreign pensions)
• Interests in foreign hedge funds and private equity

The full reportable-asset list for Form 8938 is in the official IRS Form 8938 instructions. The headline distinction: FBAR is foreign financial accounts; Form 8938 is foreign financial accounts plus foreign assets you hold directly. A founder with a 2% equity stake in a Bangalore corporation files Form 8938 for that stake even if there is no account holding it; the FBAR does not reach that interest at all.

The Dual-Reporting Trap

Most accounts that trigger Form 8938 also trigger the FBAR. The same HSBC India savings account that goes on your FBAR also goes on your Form 8938 if you cross the §6038D threshold. This is by design: Congress wanted two independent disclosure regimes, and intentional duplicate reporting is a feature, not a bug.

Where filers get burned is the reverse asymmetry. Many smart, conscientious filers learn about the FBAR (it gets more press), file it cleanly every year, and assume they have covered their foreign-asset reporting. They miss Form 8938 entirely because it lives inside the 1040 and a generic tax-prep flow may not ask the right questions to surface it. Or they file Form 8938 because TurboTax prompted them, and then assume the FBAR is included; it is not, because the FBAR goes to FinCEN through a different system.

The trap also runs the other way for founders. A founder with a 4% stake in a foreign corporation but no foreign cash accounts may owe Form 8938 (the equity interest counts) and may also owe Form 5471 if the foreign corporation is a controlled foreign corporation, but may not owe an FBAR at all (no account). We cover the 5471 layer in our Form 5471 explainer, and the PFIC layer (which kicks in if any foreign mutual fund or pooled vehicle is involved) in our PFIC reporting guide.

Penalty Structure Compared

Both penalty regimes are harsh. The FBAR is harsher.

FBAR penalties (31 U.S.C. §5321)

• Non-willful violation: Up to $16,117 per violation (2025 figure, inflation-adjusted annually). The Supreme Court in Bittner v. United States (2023) clarified that non-willful penalties are assessed per form, not per account, which was a meaningful taxpayer win.
• Willful violation: The greater of $172,892 or 50% of the account balance at the time of the violation (2025 figure), per account, per year (still per-account for willful conduct). A multi-year, multi-account willful failure can compound to seven figures fast.
• Criminal penalties: Up to $250,000 and/or 5 years imprisonment for willful violations; up to $500,000 and 10 years if the violation is part of another federal offense.

Form 8938 penalties (IRC §6038D)

• Failure to file: $10,000 per failure.
• Continued failure after IRS notice: Additional $10,000 per 30 days, capped at $50,000.
• Accuracy-related penalty on undisclosed income: 40% of the underpayment attributable to undisclosed foreign assets (this is double the standard 20% accuracy penalty).
• Statute of limitations extension: The IRS gets a 6-year statute (instead of 3) that extends to income items related to undisclosed foreign assets, and an open-ended statute on the omitted assets themselves until they are properly disclosed.

Both penalty regimes apply on top of any actual tax owed on unreported foreign income. The structure is deliberately punitive because Congress wants disclosure even from filers who would owe no additional tax.

Filing Mechanics: Where, How, When

FBAR (FinCEN Form 114):

• E-filed through the BSA E-Filing System at FinCEN. No paper filing option for individuals.
• Due April 15, with an automatic extension to October 15. The extension is automatic; you do not request it.
• Not attached to your 1040. Completely separate filing.
• Records (account statements, balances) must be kept for 5 years after the filing date.

Form 8938:

• Filed as an attachment to your Form 1040. If you e-file your 1040, Form 8938 flows through with it.
• Due with your 1040: April 15, extendable to October 15 with a standard Form 4868 extension request.
• Records must be kept as long as the return remains open to assessment (longer than usual due to the §6038D statute extension).

If you live in California and file both, you are looking at one filing with FinCEN and a separate attachment with your IRS return, with overlapping but not identical information. Most tax software will populate Form 8938 from your interview answers; almost none of it files the FBAR for you, because the FBAR goes through a different system. Plan for two filings, not one.

Worked Example: A Bay Area H-1B Engineer

Priya is a software engineer at a Mountain View company, on H-1B, married filing jointly, with her spouse on H-4 EAD. She arrived in 2020 and kept her Indian financial life intact. As of December 31, 2025:

• HSBC India savings: $80,000 high balance during the year
• HDFC India NRO account: $30,000 high balance
• Indian PPF (Public Provident Fund): $25,000
• 2% equity stake in a Bangalore startup she co-founded with her brother: estimated FMV $200,000

FBAR analysis: Total foreign financial account aggregate = $80K + $30K + $25K = $135K, well over the $10K threshold. FBAR required. She reports the HSBC, HDFC, and PPF accounts on FinCEN Form 114. The 2% Bangalore stake is not an "account" and does not go on the FBAR.

Form 8938 analysis: She is MFJ, living in the U.S. The relevant threshold is $100,000 end of year OR $150,000 at any point. Her financial account assets plus her equity interest in the foreign corporation easily exceed $150K at points during the year. Form 8938 required. She reports the same three accounts AS WELL AS her 2% equity stake in the Bangalore corporation.

Form 5471 analysis: A 2% stake by itself does not trigger 5471 (the thresholds generally start at 10% direct or constructive ownership). But if her brother is a related party and the brother-sister attribution rules push her constructive ownership over the threshold, she may also owe Form 5471 for the Bangalore corp. This is exactly the kind of cross-border family structure where DIY tax software gets it wrong. Our 5471 guide walks through the attribution math.

For Priya, ignoring any one of the three filings (FBAR, 8938, 5471) carries six-figure penalty exposure. Filing all three correctly is straightforward with the right professional help and avoidable any other way.

What Goes Wrong Without a CPA

The most common dual-reporting mistake we see at intake: an H-1B engineer in Sunnyvale or Mountain View files the FBAR (FinCEN gets the press) and assumes Form 8938 is "the same thing in the 1040." Three years later we find $30,000 in §6038D failure-to-file penalties, the 40% accuracy-related penalty on any unreported income, and an open SOL on the omitted assets. Clients who try to handle this in TurboTax routinely miss the equity-stake reporting on Form 8938 (TurboTax asks about accounts; it does not ask about a 3% Bangalore Pvt Ltd interest), the brother-sister constructive ownership rules that pull Form 5471 into play, and the PFIC §1291 trap for foreign mutual funds. DIY tax software handles the FBAR import. It does not flag the Streamlined Domestic Offshore Procedures path that converts the worst-case penalty exposure to a one-time 5%. Those are the items where engagement pays for itself many times over.

What to Do If You Have Missed Filings in Prior Years

If you have foreign accounts or assets and you have never filed an FBAR or Form 8938, do not start filing them late and hope nobody notices. The IRS and FinCEN treat unprompted late filings without a structured submission as full-penalty exposures. Instead, use the IRS's Streamlined Filing Compliance Procedures.

There are two tracks. The Streamlined Domestic Offshore Procedures are for U.S. residents who can certify in writing that their failure to file was non-willful. The penalty is reduced to a one-time 5% miscellaneous offshore penalty on the highest aggregate balance of unreported assets, in exchange for filing three years of amended 1040s plus six years of FBARs. The Streamlined Foreign Offshore Procedures are for U.S. taxpayers living abroad and waive the penalty entirely.

The non-willfulness certification has to be detailed and credible. The IRS routinely rejects bare-bones certifications that just say "I didn't know." A real certification walks through what you did know, what you did not know, what advice you sought, and why your conduct fits the legal standard for non-willful. This is one of the highest-stakes documents an international taxpayer ever signs, and we strongly recommend professional preparation. Our international tax team handles streamlined submissions regularly.

FAQ

Do I need to file an FBAR if my foreign accounts were closed mid-year?

Yes. The FBAR threshold is "$10,000 aggregate at any point during the year." If your accounts crossed that line in March and you closed them in June, you still file an FBAR for that calendar year, reporting the high balances during the months the accounts existed.

Does a foreign 401(k)-equivalent require Form 8938?

Generally yes. Foreign retirement and pension accounts are listed as specified foreign financial assets under §6038D and the Form 8938 instructions. A Canadian RRSP, a U.K. SIPP, an Indian PPF, an Australian superannuation account, and a Hong Kong MPF all typically need to go on Form 8938 once you cross the threshold. Some treaty-based reporting exemptions exist, but the default rule is: it goes on the form. The FBAR generally also picks these up if they are held in a "financial institution" account.

What about a foreign-issued credit card?

A credit card with a balance you owe is not a financial asset to you; it is a liability. Standard foreign credit cards do not go on either form. However, a foreign debit card linked to a foreign bank account is a different story: the underlying bank account is reportable, even if the card is what you actually use.

I have signature authority on my employer's foreign subsidiary account but no personal interest. Do I file?

For FBAR purposes, yes, generally. Signature authority over a foreign financial account triggers FBAR reporting even without beneficial ownership. There are limited exceptions for officers and employees of certain U.S. publicly traded companies, but the default rule is that signature authority creates FBAR exposure. For Form 8938, signature authority alone (without beneficial interest) generally does NOT trigger filing.

If I file FATCA-reported information through Form 8938, does that satisfy the FBAR?

No. These are two separate filings administered by two different agencies (IRS for 8938, FinCEN for FBAR). Filing one does not satisfy the other. The IRS's own comparison table states this explicitly. You must file both if you cross both thresholds.

What's the deadline if I get a 1040 extension to October 15?

Both forms then become due October 15. The FBAR is automatically extended to October 15 without any action on your part; Form 8938 follows your 1040 extension, so if you filed Form 4868 you have until October 15 as well. The deadlines align, which is one of the few easy things about dual reporting.

When to Talk to Us

Dual foreign-asset reporting is a high-stakes, easy-to-miss compliance area, especially for the Bay Area's international workforce. If you are on H-1B with accounts back home, a dual citizen, a founder with a non-U.S. subsidiary, or a U.S. resident with any meaningful foreign holdings, the right answer is rarely "skip it" and never "file just one."

At Silicon Valley Tax, we handle FBAR and Form 8938 compliance every season for engineers, founders, and investors across Mountain View, Sunnyvale, Cupertino, Palo Alto, and the rest of the South Bay. We also handle the related forms that often come along for the ride: 5471 for foreign-corporation interests, 8621 for PFICs, 3520 for foreign trusts and gifts. If you suspect you have a gap in prior-year filings, we walk clients through streamlined submissions on a flat-fee basis. Visit our Mountain View tax accountant page or our international tax services page for more detail on how we work.

Schedule a free consultation and we will map out exactly which forms apply to your situation, what the threshold math looks like for your filing status, and whether you have any past-year exposure that should be cleaned up before the IRS asks.