FBAR and FATCA Requirements for Expats: A 2026 Guide

US citizens and green card holders living abroad face two separate foreign-account disclosure regimes that often get conflated: FBAR (FinCEN Form 114) and FATCA (IRS Form 8938). They share overlapping information but sit under different statutes, have different thresholds, go to different agencies, and carry different penalties. Missing either one is expensive; missing both is a compounding problem. This guide breaks down what each form actually requires, the 2026 filing thresholds side by side, what counts as a reportable account, how the penalty regime works after the Supreme Court's Bittner decision, and the streamlined procedures available to expats who filed late or never at all.

The core reason both regimes exist is the United States' unique citizenship-based taxation system. Almost every other country taxes on residence; the US taxes its citizens and permanent residents on worldwide income no matter where they live. Foreign account reporting is the enforcement backbone for that system. Whether a US person owes any tax abroad is a separate question — the reporting obligation is independent of whether tax is due.

FBAR vs FATCA at a glance

The single most useful way to keep these straight is a side-by-side comparison of the mechanics. The specific dollar thresholds below are the widely-established figures in effect as of 2026 and should be verified against current IRS and FinCEN guidance before filing.

The threshold gap is the single most consequential difference. FBAR triggers at a very low bar — a single foreign checking account that briefly held $11,000 during the year — while Form 8938 for a couple filing jointly abroad may not trigger until aggregate assets exceed $600,000. It is common for an expat to owe an FBAR every year while owing an 8938 in only some years, or never.

Who is a "US person" for these purposes

The reporting net catches more than just citizens living in the US. A US person for FBAR and FATCA purposes generally includes US citizens (regardless of where they live), green card holders (US lawful permanent residents), individuals who meet the substantial presence test (31 days in the current year plus 183 days over a three-year weighted lookback, per the residency rules covered on the United States country page), and certain domestic entities. Accidental Americans — people born in the US who moved abroad as children, or people with a US-citizen parent who transmitted citizenship — are equally subject.

The obligation attaches to the person, not the account. A US citizen who has never lived in the US, holds only a local bank account in her country of birth, and pays all her tax there is still required to file FBARs if her account exceeds the $10,000 threshold. This is not a matter of enforcement priority; it is a matter of law.

What counts as a foreign financial account

FBAR uses a broader definition than most people realise. A foreign financial account for FinCEN 114 purposes includes:

• Bank accounts (checking, savings, time deposits) held outside the US
• Securities accounts, brokerage accounts, and mutual fund accounts
• Commodity futures or options accounts
• Insurance policies or annuities with a cash value
• Foreign pension accounts in which the taxpayer has a financial interest — with important treaty-based carve-outs for certain qualified plans
• Accounts held at a foreign branch of a US bank (still "foreign")
• Accounts over which the taxpayer has signature or other authority, even without financial interest

What is not generally an FBAR-reportable account: directly-held foreign real estate, precious metals held in a personal safe, cryptocurrency held in a self-custody wallet (the position on custodial crypto exchanges has been evolving and is worth verifying with a licensed adviser), and accounts held at a US branch of a foreign bank.

Form 8938 uses a similar but not identical list. It adds specified foreign financial assets that are not accounts: direct holdings of stock or securities issued by a non-US person, interests in a foreign entity (partnership interests, foreign corporations, foreign trusts), and financial instruments with a non-US counterparty. Notably, foreign real estate held directly is not reported on 8938 either — but shares in a foreign company that holds real estate would be.

The overlap trap: reporting the same account twice

Because the two regimes were built at different times to solve different problems, the same account frequently shows up on both forms. That is expected and correct — the IRS and FinCEN operate under separate authorities, and one filing does not substitute for the other. There is no "we already told the Treasury" defence. Duplicate reporting is the default, and taxpayers with more than a handful of foreign accounts typically maintain a shared source spreadsheet feeding both filings each year.

Signature-authority-only accounts are the classic edge case. A US-citizen CFO of a foreign subsidiary who signs on the company's local bank accounts must include those accounts on her personal FBAR even though she has no beneficial interest. Form 8938 does not require this — it is limited to assets in which the taxpayer has an ownership interest.

Foreign pensions, PFICs, and other reporting complications

Long-term expats accumulate account types that trigger reporting well beyond FBAR and 8938. Three that regularly cause problems:

Foreign pensions. Employer and personal pension accounts abroad usually qualify as foreign financial accounts for FBAR. Whether contributions and growth inside the pension are also currently taxable to the US depends on whether the country has an income tax treaty with the US that recognises the plan (the UK, Canada, Germany, Switzerland, and others do, with varying scope) and whether the taxpayer makes appropriate treaty elections. This is highly fact-specific — verify with a cross-border tax adviser.

PFICs. Most non-US mutual funds and many exchange-traded funds are classified as Passive Foreign Investment Companies under US rules. Owning one triggers Form 8621 filing, and unless a qualifying election is made, the tax treatment is punitive — an excess-distribution regime that can produce effective rates approaching the top marginal rate of 37% plus interest. This is why many US expats deliberately avoid local mutual funds and stick to individual securities or US-domiciled ETFs.

Foreign trusts and gifts. Form 3520 reports transactions with foreign trusts and receipt of large gifts or inheritances from non-US persons. Form 3520-A covers trusts of which the US person is treated as the owner. Penalties for late 3520 filings are among the harshest in the code — typically 35% of the amount transferred or received — and enforcement has been aggressive. The IRS has recently signalled some softening on inheritance-related 3520 penalties, but the underlying filing obligation stands.

The penalty regime

FBAR penalties are structurally different from most tax penalties because they sit under the Bank Secrecy Act, not the Internal Revenue Code. There are two tiers:

Non-willful violations. The statutory ceiling is approximately $10,000 per violation, indexed for inflation. In Bittner v. United States (2023), the Supreme Court held that the non-willful penalty applies per unfiled report, not per unreported account. For a taxpayer with 25 unreported accounts across five years, that is the difference between a maximum non-willful exposure in the tens of thousands versus millions of dollars. The decision meaningfully reduced downside for taxpayers with many small accounts.

Willful violations. The ceiling is the greater of approximately $100,000 (indexed) or 50% of the account balance at the time of the violation, per year. Willfulness is a factual question — reckless disregard can suffice — and the government has won willful-penalty cases against taxpayers who checked "no" on the Schedule B foreign-account question while holding substantial offshore assets. In the most severe cases, willful FBAR violations are also a criminal offence carrying up to five years' imprisonment.

Form 8938 penalties start at $10,000 for failure to file, escalate up to an additional $50,000 for continued failure after IRS notice, and stack with a 40% accuracy-related penalty on any understatement of tax attributable to undisclosed foreign assets. The statute of limitations for a return with an unfiled 8938 remains open indefinitely for the omitted asset — arguably the most consequential collateral effect.

Streamlined Filing Compliance Procedures for late filers

Most expats who discover they have missed FBARs and/or 8938s over multiple years do not go into full Voluntary Disclosure Practice (which is criminal-facing and expensive). They use the Streamlined Filing Compliance Procedures, an IRS program specifically designed for non-willful non-compliance. There are two tracks:

Streamlined Foreign Offshore Procedures (SFOP). Available to US persons who meet a non-residency requirement — generally, in at least one of the last three years for which the tax return due date has passed, the taxpayer did not have a US abode and was physically outside the US for at least 330 days. SFOP requires filing (or amending) three years of returns, six years of FBARs, and a signed non-willfulness certification. The penalty is zero. Any tax due plus interest is owed, but there is no miscellaneous offshore penalty and no FBAR penalty.

Streamlined Domestic Offshore Procedures (SDOP). For US-resident taxpayers who cannot meet the physical-presence test. Same three years of returns and six years of FBARs, but with a 5% miscellaneous offshore penalty assessed on the highest year-end aggregate value of the unreported foreign financial assets over the covered period.

The non-willfulness certification is the critical piece. If the IRS later determines the conduct was willful, streamlined protection is lost and the government can pursue full willful penalties on the underlying facts. Anyone using streamlined should have counsel evaluate the certification before signing.

There is also a Delinquent FBAR Submission Procedure for taxpayers who have properly reported and paid tax on all account income but simply missed the FBAR itself. Filed with a statement of reasonable cause, FinCEN will not automatically impose penalties. This is a narrower path than streamlined but has zero cost in the right facts.

Practical filing calendar for 2026

US expats juggle several deadlines each year. The commonly-applicable dates as of 2026 are:

• 15 April 2026: Statutory due date for the 2025 Form 1040 and FBAR (though FBAR has an automatic extension to 15 October — no form required)
• 15 June 2026: Automatic two-month extension for US persons living abroad to file Form 1040 (interest still accrues on any tax due from 15 April)
• 15 October 2026: Extended deadline for both Form 1040 (via Form 4868) and FBAR
• 15 December 2026: Discretionary further extension for expats, by written request

Form 8938 is not separately filed — it is an attachment to Form 1040 and follows the return's due date, including extensions.

Interaction with the Foreign Earned Income Exclusion and Foreign Tax Credit

A common misconception is that if the Foreign Earned Income Exclusion or Foreign Tax Credit zeroes out US tax liability, the reporting obligations disappear. They do not. The FEIE, set at $132,900 for 2026, and the FTC affect how much tax is owed — not whether returns and information forms must be filed. A US citizen with $80,000 of wages fully excluded under FEIE still files a 1040 and, if the account thresholds are met, an FBAR and Form 8938. The FEIE claim itself is made on the return that reporting forms attach to.

When reporting obligations end

FBAR and FATCA obligations end when a person ceases to be a US person for tax purposes. For green card holders, that generally means formally abandoning the green card via Form I-407 and, where applicable, filing a final Form 1040 and potentially Form 8854 as a covered expatriate. For citizens, it means renouncing US citizenship — a process with its own exit tax under Section 877A for individuals meeting the covered-expatriate tests (broadly: net worth over $2 million, average annual net income tax over an inflation-indexed threshold, or failure to certify five years of prior tax compliance). The exit-tax mechanics are discussed on the general exit taxes guide. Until formal expatriation is complete, reporting continues — including for the year of expatriation itself.

Common questions this guide does not answer

Every real-world compliance situation has facts that push it outside general guidance. Situations that particularly benefit from a licensed cross-border tax adviser include: dual-citizen minors with foreign accounts opened by parents; jointly-held accounts with non-US spouses; foreign self-employed pension contributions; foreign incorporated business ownership triggering CFC / GILTI analysis; and any situation where a Streamlined certification is contemplated. This guide is informational only and is not tax or legal advice — the FBAR and FATCA rules interact with treaties, entity classification elections, and case law in ways that require professional judgement.

Where to go next

For the underlying US tax framework — bracket structure, worldwide-income treatment, and treaty positions — see the United States country page. For exclusion vs credit mechanics, the FEIE vs Foreign Tax Credit comparison walks through the numbers. Expats considering a formal exit should read the renouncing US citizenship guide and the exit taxes explainer. For a broader look at moving abroad while staying US-tax-compliant, see US Citizens Moving Abroad in 2026, and use Compare to line up destination countries side by side. General questions are collected in the FAQ.