Is a Liechtenstein cash-value life insurance policy reportable on the FBAR?

Yes, where the policy has a cash or surrender value. The IRS comparison of FBAR and Form 8938 requirements lists foreign insurance and annuity contracts with a cash value as reportable on both forms. The policy is reported at its maximum value for the year, converted to dollars. Whether the growth inside it is also taxable in the US each year depends on whether the policy qualifies as life insurance under US rules.

I reported my Luxembourg interest to HMRC. Do I still need to file an FBAR?

Yes. The FBAR is a US information report filed with FinCEN, and reporting the same income on a UK Self Assessment return does not satisfy it. A US citizen living in the UK must file FinCEN Form 114 whenever the combined maximum value of all foreign accounts, including UK ones, exceeds $10,000 at any time in the calendar year. HMRC does not receive or act on FBARs.

Can the IRS find out about my Luxembourg or Liechtenstein accounts?

You should assume so. Under FATCA, foreign financial institutions generally report accounts held by US persons to the IRS, and both Luxembourg and Liechtenstein have intergovernmental agreements with the United States. If you have signed a US person self-certification with your bank or insurer, your account details have very likely been reported, which is a strong reason to correct a missed FBAR before the IRS makes contact.

Is there a penalty for a missed FBAR under the Streamlined Foreign Offshore Procedures?

No, for eligible filers. US citizens who met the 330-day non-residency test and whose failures were non-willful can file three years of returns and six years of FBARs with Form 14653, and the IRS waives failure-to-file, accuracy, information return and FBAR penalties. The 5 percent miscellaneous offshore penalty applies only under the Streamlined Domestic Offshore Procedures, not the foreign version.

Do I need Form 8621 for Luxembourg funds held in my custody account?

Usually, yes. Luxembourg UCITS and SICAV funds are generally treated as passive foreign investment companies for US purposes, and Form 8621 is the return a US shareholder files to report PFIC holdings, distributions, disposals and elections. Each fund typically needs its own form for each year in scope. The account itself still goes on the FBAR, and the holdings may also belong on Form 8938.

Which exchange rate do I use for euro and Swiss franc balances on a late FBAR?

The FBAR instructions direct you to convert each account's maximum value using the US Treasury Reporting Rates of Exchange for the last day of the calendar year being reported, not the rate on the day of the peak. Use the same official rate for every account in a given currency for that year. Your tax return may use different, transaction-date or average rates, so the figures will rarely match exactly.

Missed FBAR: Luxembourg and Liechtenstein Accounts

A Missed FBAR on a Luxembourg or Liechtenstein account is one of the most common compliance gaps we find in the files of high-net-worth US citizens living in the United Kingdom, and it is almost always fixable. If you are a US citizen with a private-bank current account, a custody or securities account, or a cash-value life insurance policy booked in either country, and the combined value of your foreign accounts passed $10,000 at any point in a year, you were required to file FinCEN Form 114 for that year. The direct answer is this: file the missing reports electronically through FinCEN's BSA E-Filing System, and, if income from those accounts was also left off your US returns, do it inside the Streamlined Foreign Offshore Procedures, which for eligible non-willful filers living abroad carry no penalty at all.

The reason this gap is so common is structural rather than careless. Many clients opened these accounts years ago through a relationship banker in Geneva, Zurich or London, think of them as UK-managed wealth, and never realise that the booking centre, not the banker's office, is what makes the account foreign for US purposes. Others assumed that because the UK tax return already reports the income, or because the bank sends tax statements, the US side is somehow covered. It is not. The FBAR is a separate US information report, and Luxembourg and Liechtenstein institutions have been reporting US account holders to the IRS for more than a decade.

What Is an FBAR and Who Must File One?

An FBAR is the Report of Foreign Bank and Financial Accounts, FinCEN Form 114, an annual information return filed with the Financial Crimes Enforcement Network rather than with your tax return. FinCEN states at https://www.fincen.gov/report-foreign-bank-and-financial-accounts that a US person with a financial interest in, or signature authority over, foreign financial accounts must file when the aggregate value of those accounts exceeds $10,000 at any time during the calendar year. US citizenship alone makes you a US person, so living in London, Edinburgh or the Cotswolds changes nothing about the obligation.

The IRS guidance at https://www.irs.gov/businesses/small-businesses-self-employed/report-of-foreign-bank-and-financial-accounts-fbar confirms that the FBAR is due on 15 April following the calendar year reported, with an automatic extension to 15 October that you do not need to request. It is filed only electronically through the BSA E-Filing System and is never attached to the Form 1040. Filing late, or not at all, is itself a violation.

Which Luxembourg and Liechtenstein Accounts Count as Reportable?

The FBAR does not only catch bank deposits. A reportable foreign financial account is broadly any account held with a financial institution located outside the United States, and the IRS comparison table at https://www.irs.gov/businesses/comparison-of-form-8938-and-fbar-requirements makes clear that foreign mutual funds and foreign insurance or annuity contracts with a cash value are reportable on the FBAR as well as on Form 8938. For the typical Luxembourg or Liechtenstein relationship that means several separate entries, not one.

Private-bank current and deposit accounts in euro, Swiss franc, sterling or dollars, including fiduciary or call deposits held at the same institution
Custody, securities and discretionary portfolio accounts, even where every holding is a listed bond or a US-listed share
Holdings in Luxembourg-domiciled investment funds held through a nominee or platform account in your name
Cash-value life insurance and unit-linked or capital redemption style policies issued by a Luxembourg or Liechtenstein insurer, where the policy has a surrender value
Annuity contracts with a cash value, whether or not payments have started
Joint accounts with a spouse, which each US spouse generally reports in full
Accounts owned by a company you control, and accounts where you hold signature authority for an employer or family company without owning the money

Signature authority is the trap high earners in finance fall into most often. The IRS comparison table states that signature authority is reportable on the FBAR, subject to exceptions, but not on Form 8938 unless you also hold a financial interest. If you can instruct a Luxembourg custodian to move money out of a family holding company account, or you are an authorised signatory on an employer's treasury account in Vaduz, the account may belong on your FBAR even though not a cent of it is yours. We review each mandate letter against the exceptions before deciding.

How Does the $10,000 Aggregate Threshold Work Across Several Accounts?

The $10,000 test is applied to the total of the maximum values of all your foreign accounts in the year, not to any single account. Five accounts each peaking at $3,000 trigger a filing. For the clients we see with Luxembourg and Liechtenstein relationships the threshold is usually exceeded many times over, but the arithmetic still matters, because once you are over the line every foreign account must be listed, including the small UK current account and the dormant dollar account you forgot about. Your UK accounts are foreign accounts for US purposes too.

Each account is reported at its maximum value during the calendar year, which is the highest balance at any point, not the year-end figure. For a securities account a reasonable approximation from periodic statements is generally accepted, but for an account that received a large incoming transfer and paid it out a week later, the peak must be captured even though no statement ever shows it as a closing balance.

How Do You Convert Euro and Swiss Franc Balances to Dollars?

Luxembourg accounts are typically denominated in euro and Liechtenstein accounts in Swiss francs, often with additional currency sub-accounts. The FBAR instructions direct filers to convert each maximum value using the Treasury Reporting Rates of Exchange for the last day of the calendar year, rather than the rate on the day the peak occurred or a commercial bank rate. Those rates are published by the US Treasury, which describes them as the government's authoritative exchange rates for converting foreign currency amounts, at https://fiscaldata.treasury.gov/datasets/treasury-reporting-rates-exchange/treasury-reporting-rates-of-exchange. Your tax return uses different conversion rules, so the FBAR and return figures will rarely match exactly.

Do You Also Need Form 8938, and How Does It Overlap With the FBAR?

Very often, yes. Form 8938, the Statement of Specified Foreign Financial Assets, is filed with your income tax return and reports many of the same accounts. For a US taxpayer living abroad the IRS comparison table sets the threshold at more than $200,000 on the last day of the tax year or more than $300,000 at any time during the year for unmarried filers and married individuals filing separately, and at more than $400,000 on the last day of the year or more than $600,000 at any time for married couples filing jointly. A Luxembourg private-bank relationship of any real size exceeds those levels.

Filing one form never satisfies the other. The FBAR goes to FinCEN; Form 8938 goes to the IRS with the return. The penalties are separate too: the IRS table lists a Form 8938 penalty of up to $10,000 for failure to disclose, with an additional $10,000 for each 30 days of non-filing after IRS notice, up to a potential maximum of $60,000. In a catch-up, every year in which Form 8938 was required must be corrected on the returns as well, which is why a missed FBAR is so often the visible symptom of a wider information-return gap.

Are Luxembourg Funds PFICs That Need Form 8621?

In most cases, yes. Luxembourg is one of the largest fund domiciles in the world, and the euro and sterling share classes recommended by European private banks are frequently Luxembourg UCITS or SICAV vehicles. For US purposes a non-US pooled investment fund is ordinarily a passive foreign investment company. The IRS explains at https://www.irs.gov/forms-pubs/about-form-8621 that Form 8621 is the information return a US person who is a direct or indirect shareholder of a passive foreign investment company uses to report distributions, dispositions, elections and annual holdings.

This matters in a missed FBAR file because the PFIC problem usually travels with it. A custody account full of Luxembourg funds has to be reported on the FBAR at its maximum value, the funds themselves may need to be listed on Form 8938, and each fund generally requires its own Form 8621 with the return for each year in scope. Without a qualified electing fund statement from the fund, which European managers rarely provide, the default excess distribution regime can turn ordinary-looking gains into heavily taxed income with an interest charge. Working out the right method for each fund, year by year, is usually the largest single element of preparation in these engagements.

Cash-value insurance policies booked in Luxembourg or Liechtenstein raise a related question. A policy that is reportable on the FBAR may or may not qualify as life insurance under US rules, and if it does not, the investment growth inside it can be taxable in the United States as it accrues, sometimes with PFIC exposure on the underlying funds. We analyse the policy terms before deciding how to report the income, rather than assuming the wrapper defers anything for US purposes.

Does the IRS Already Know About Your Luxembourg and Liechtenstein Accounts?

You should assume it does. Under the Foreign Account Tax Compliance Act, the IRS explains at https://www.irs.gov/businesses/corporations/foreign-account-tax-compliance-act-fatca, foreign financial institutions are generally required to report on the foreign assets held by their US account holders or face withholding on certain payments. Both Luxembourg and Liechtenstein have signed intergovernmental agreements with the United States, and private banks and insurers in both countries routinely ask clients to confirm US status and provide a US taxpayer identification number. If you signed a US person self-certification when onboarding or refreshing your file, the institution has almost certainly been reporting your account to the IRS each year.

That has two consequences for a late filer. First, it raises the stakes of doing nothing, because the IRS can match institution reports against the absence of an FBAR or Form 8938. Second, it supports the argument for acting now, while you can still describe yourself as someone the IRS has not contacted. The IRS states plainly that if it has not contacted you about a late FBAR and you are not under civil or criminal investigation, you should file late FBARs as soon as possible to keep potential penalties to a minimum.

What Are the Penalties for a Missed FBAR, Non-Willful and Willful?

FBAR penalties are civil monetary penalties under the Bank Secrecy Act, and the IRS notes at https://www.irs.gov/businesses/comparison-of-form-8938-and-fbar-requirements that they are adjusted annually for inflation and that criminal penalties may also apply. Rather than quote a figure that changes each year, it is more useful to understand the two categories, because which one you fall into decides almost everything about your options.

Non-willful violations: conduct due to negligence, inadvertence, mistake or a good-faith misunderstanding of the law. The maximum penalty is an inflation-adjusted dollar amount, and the Supreme Court held in 2023, in Bittner v. United States, that it applies per annual report rather than per account, which sharply limits exposure for someone with many accounts
Reasonable cause: no penalty is imposed for a non-willful violation where there was reasonable cause and the balance was properly reported, so the facts behind the failure matter
Willful violations: a knowing or reckless failure to file. The maximum is the greater of a larger inflation-adjusted dollar amount or 50 percent of the account balance at the time of the violation, per account, per year, which can exceed the value of the account over several years
Criminal exposure: reserved for the most serious willful conduct, and the reason anyone whose facts look willful needs a different route from the one described below

Whether conduct was willful is a question of fact. Account-number-only arrangements, instructions to hold mail at the bank, refusing to sign FATCA self-certifications or moving funds when a bank asked about US status are the kind of facts that point toward willfulness. A US citizen who opened a Luxembourg account on a banker's recommendation, reported the income to HMRC and simply did not know about a US form has a very different story. We document the history carefully before recommending a route.

How Do You Fix a Missed FBAR Through BSA E-Filing?

Every route ends in the same place: each missing FinCEN Form 114 is filed electronically through FinCEN's BSA E-Filing System, one report per calendar year, listing every reportable account. Each late report asks you to select a reason for filing late. The IRS withdrew its separate Delinquent FBAR Submission Procedures page around July 2026, so it should not be treated as a live, named route. What remains is the general instruction to file late FBARs with an explanation of why they are late, and the Streamlined Filing Compliance Procedures.

Which of those fits depends on the tax returns. If every dollar of interest, dividends and gains from the Luxembourg and Liechtenstein accounts was already reported on your Forms 1040, all required information returns were filed, and the only failure was the FBAR itself, filing the late reports with a clear, accurate statement of reasonable cause is often appropriate. If income was omitted, Form 8938 or Form 8621 was missed, or the PFIC rules were not applied, the returns need correcting too, and for a UK resident that usually means the Streamlined Foreign Offshore Procedures.

Can the Streamlined Foreign Offshore Procedures Clear a Missed FBAR With No Penalty?

For eligible taxpayers, yes. The IRS sets out the procedures for US taxpayers residing outside the United States at https://www.irs.gov/individuals/international-taxpayers/us-taxpayers-residing-outside-the-united-states. A US citizen qualifies on residence if, in any one of the most recent three years for which the due date has passed, they did not have a US abode and were physically outside the United States for at least 330 full days. Most long-term UK residents meet that easily. The failures must also have resulted from non-willful conduct, which the IRS describes as conduct due to negligence, inadvertence or mistake, or conduct that is the result of a good-faith misunderstanding of the requirements of the law.

File delinquent or amended returns for the most recent three years with a passed due date, with all required information returns, such as Forms 8938, 8621 and 5471 where they apply
File delinquent FBARs for the most recent six years with a passed FBAR due date through BSA E-Filing, selecting Other as the reason for late filing and entering Streamlined Filing Compliance Procedures in the explanation
Pay the full tax and interest due on the corrected returns with the submission
Complete and sign Form 14653, the certification of non-willful conduct, with a specific factual narrative rather than boilerplate
Write Streamlined Foreign Offshore in red at the top of each return and information return, and post the paper package to the dedicated address the IRS lists, as electronic submission is not accepted

The IRS states that taxpayers who complete the foreign procedures correctly will not be subject to failure-to-file, failure-to-pay or accuracy-related penalties on the submitted returns, and that information return and FBAR penalties are waived as well. There is no 5 percent miscellaneous offshore penalty in the foreign procedures; that charge belongs only to the Streamlined Domestic Offshore Procedures, used by taxpayers who do not meet the non-residency test. Penalties already assessed for the years in scope are not abated, and the protection falls away if a later examination finds the underlying conduct was fraudulent or the FBAR violation willful, which is why the Form 14653 narrative has to be accurate and complete.

Worked Example: A London Resident With Three Foreign Relationships

The following is an illustration with invented figures, not a real client, and the exchange rates are assumptions chosen for round numbers. Michael is a US citizen who has lived in London for twelve years and works in private equity. He holds a euro custody account in Luxembourg with a peak value of EUR 2.4 million, invested mostly in Luxembourg-domiciled bond and equity funds; a Swiss franc deposit account in Liechtenstein peaking at CHF 600,000; and a Liechtenstein unit-linked policy with a surrender value of CHF 900,000. He has filed US returns every year, reporting his UK salary and carried interest and claiming foreign tax credits, but his preparer never asked about the accounts and he has never filed an FBAR.

Assuming year-end Treasury rates of 1.10 dollars per euro and 1.20 dollars per Swiss franc for the illustration, the custody account converts to about $2.64 million, the deposit account to about $720,000 and the policy to about $1.08 million, together with his UK current and savings accounts. He has been over the FBAR threshold every year and, as an unmarried filer living abroad, over the Form 8938 threshold as well. The fund holdings mean Form 8621 was required for each fund. His returns omitted the deposit interest and the fund income entirely, so this is not an FBAR-only problem.

Michael was outside the United States for far more than 330 days in each of the last three years and had no US abode. He reported the same income to HMRC, signed his banks' US self-certifications when asked and kept every statement, all of which support non-willfulness. The route is the Streamlined Foreign Offshore Procedures: three years of amended Forms 1040 with Forms 8938 and 8621 and any additional foreign tax credit, six years of FBARs through BSA E-Filing, payment of the resulting tax and interest, and a detailed Form 14653. Under those procedures no FBAR, information-return or accuracy penalty is due. His real cost is the US tax on the omitted income, much of it offset by UK tax already paid on the same income, plus the PFIC computations.

What Records Should You Request From Luxembourg and Liechtenstein Institutions?

A six-year FBAR catch-up and a three-year amended return set are only as good as the documents behind them. The FBAR rules also carry their own record-keeping duty, so the records you gather for the catch-up become the records you keep. Foreign private banks can take several weeks to produce historical statements, particularly for closed accounts, so we ask clients to request them on day one.

Annual and monthly statements for every account, for at least the six FBAR years in scope, showing account number, currency and balances
Confirmation of the maximum value in each year, or the statement data needed to estimate it, for custody accounts as well as deposits
Annual tax reports or income summaries showing interest, dividends, realised gains and withholding by year
Transaction histories for each Luxembourg fund holding, with purchase dates, costs, distributions and disposals for the Form 8621 computations
Policy schedules, annual valuations and surrender value statements for any cash-value insurance or annuity contract, plus the policy terms
Mandate and signatory documents for any account where you hold signature authority without ownership
Copies of the FATCA self-certifications you signed, which help date when the institution knew you were a US person
Your UK Self Assessment returns for the same years, to reconcile the income and support foreign tax credits

What About the UK Side of a Missed FBAR?

The FBAR is a purely US obligation; HMRC neither receives it nor penalises its absence. But a Luxembourg or Liechtenstein account held by a UK resident is also visible to HMRC, because both countries exchange account information with the UK under the Common Reporting Standard. A remediation project is a good moment to confirm that the same interest, fund income and gains have been correctly returned on your UK Self Assessment, including the UK treatment of offshore funds and any policy gains. If something was missed on the UK side, HMRC has its own disclosure routes for offshore income, which run separately from the IRS process.

Missed FBAR Checklist: What to Do Next

A Missed FBAR on Luxembourg and Liechtenstein accounts is serious but, for a non-willful UK resident, rarely catastrophic. The sequence we follow is consistent: map every foreign account and signatory mandate, gather six years of statements, convert maximum values at Treasury year-end rates, test the returns for omitted income and missing Forms 8938 and 8621, decide between a reasonable-cause late filing and the Streamlined Foreign Offshore Procedures, and then file the FBARs and returns together so the IRS receives a complete, coherent picture. Acting before the IRS makes contact preserves the most favourable options, and with FATCA reporting already flowing from both countries, waiting rarely improves the position.